阅读说明：本技术 通体干压瓷质电磁炉加热面板材料及其制备方法 (Whole body dry-pressed porcelain heating panel material for induction cooker and preparation method thereof ) 是由 刘江义 黄建平 于 2019-11-04 设计创作，主要内容包括：本发明涉及通体干压瓷质电磁炉加热面板材料及其制备方法。按重量份：坯料：锂辉石30～60份；堇青石0～20份；焦宝石0～20份；煅烧高岭土0～20份；高岭土10～30份；熔融石英0～20份；碱土金属矿物0～4份；色料0.5～6份；面板色料:锂辉石15～30份；氧化铝20～30份；矿化剂0～5份；过渡金属的氧化物30～60份；面板釉料:锂辉石0～60份；透锂长石0～70份；煅烧氧化锌0～10份；碳酸钡0～10份；方解石0～10份；熔融石英15～35份；高岭土4～10份；熔块0～25份；色料0.5～6份；面板色料按呈色要求分别加入面板坯料和面板釉料,加入量0.5～6％,面板釉料施于面板坯料,形成层状结构。(The invention relates to a heating panel material of a full-body dry-pressed porcelain induction cooker and a preparation method thereof. According to the parts by weight: blank material: 30-60 parts of spodumene; 0-20 parts of cordierite; 0-20 parts of flint clay; 0-20 parts of calcined kaolin; 10-30 parts of kaolin; 0-20 parts of fused quartz; 0-4 parts of alkaline earth metal minerals; 0.5-6 parts of a pigment; 15-30 parts of a panel pigment, namely spodumene; 20-30 parts of aluminum oxide; 0-5 parts of a mineralizer; 30-60 parts of transition metal oxide; panel glaze, namely spodumene 0-60 parts; 0-70 parts of petalite; calcining 0-10 parts of zinc oxide; 0-10 parts of barium carbonate; 0-10 parts of calcite; 15-35 parts of fused quartz; 4-10 parts of kaolin; 0-25 parts of frit; 0.5-6 parts of a pigment; the panel pigment is added into the panel blank and the panel glaze respectively according to the color generation requirement, the addition amount is 0.5-6%, and the panel glaze is applied to the panel blank to form a laminated structure.)

1. A heating panel material of a full-body dry-pressed porcelain induction cooker, which is characterized in that,

the panel blank comprises the following components in parts by weight:

30-60 parts of spodumene, 0-20 parts of cordierite and 0-20 parts of flint clay

0-20 parts of calcined kaolin, 10-30 parts of kaolin and 0-20 parts of fused quartz

0-4 parts of alkaline earth metal mineral and 0.5-6 parts of pigment;

the panel pigment comprises the following components in parts by weight:

15-30 parts of spodumene, 20-30 parts of alumina or silicon dioxide carrier

0-5 parts of a mineralizer, 30-60 parts of an oxide or carbonate of a transition metal;

the panel glaze comprises the following components in parts by weight:

0-60 parts of spodumene, 0-70 parts of petalite and 0-10 parts of calcined zinc oxide

0-10 parts of barium carbonate, 0-10 parts of calcite (or limestone) and 15-35 parts of fused quartz

4-10 parts of kaolin, 0-25 parts of frit and 0.5-6 parts of pigment;

the panel pigment is added into the panel blank and the panel glaze respectively according to the color generation requirement, the addition amount is 0-6%, and the panel glaze is applied to the panel blank to form a laminated structure.

2. The heating panel material of the whole body dry pressing porcelain induction cooker according to claim 1, wherein after the panel blank, the panel pigment and the panel glaze are calcined into porcelain, the coefficient of linear thermal foot expansion is less than or equal to 2.5X 10^ -6/° C, the panel is vitrified, and the water absorption is less than or equal to 0.5%; glazing amount: 100 grams per square meter to 150 grams per square meter (dry weight); the sintering temperature is 1240 ℃ to 1270 ℃, and the heat preservation is more than 1.5 hours.

3. The heating panel material of the whole body dry pressing porcelain induction cooker according to claim 1,

the panel pigment comprises the following chemical components in parts by weight:

LiAl[Si₂O₆]20 parts of Co₃O₄30 parts of Cr₂O₃30 portions of

Li0₂1.4 parts of Al₂O₃20 parts of NiO 2 parts

CuO 2 parts Fe₂O₃30 parts of.

4. The heating panel material of the whole body dry pressing porcelain induction cooker according to claim 1,

the panel pigment comprises the following chemical components in parts by weight:

Si0₂12.8 parts of Co₃O₄18 parts of Cr₂O₃30 portions of

Li0₂1.4 parts of Al₂O₃25.3 parts of NiO 2 parts

CuO 2 parts of Fe₂O₃30.3 parts.

5. The heating panel material of the whole body dry pressing porcelain induction cooker according to claim 1, wherein the panel pigment comprises the following chemical components in parts by weight:

6. a heating panel material of a full-body dry-pressed porcelain induction cooker, which is characterized in that,

the chemical composition of the panel blank is selected from one of the following components:

⑴ the chemical components of the panel blank comprise the following components in parts by weight:

Li₂o2-4 parts of K₂O+Na₂O<1 part of CaO<1 part of

0.3 to 3 parts of MgO by weight of Al₂O₃22-28 parts of Si₂65 to 70 portions of O

0.5-6 parts of a pigment;

⑵ the chemical components of the panel blank comprise the following components in parts by weight:

Li₂o2-4 parts of K₂O+Na₂O<1 part of CaO<1 part of

0.3 to 3 parts of MgO by weight of Al₂O₃22-28 parts of Si₂65 to 70 portions of O

0.5-6 parts of a pigment;

the panel pigment chemical composition is selected from one of the following components:

⑴ the panel pigment comprises the following components in parts by weight:

Al₂O₃20～30 RO+RO₂+R₂O₃+R₃O₄＝30～60(R：Fe、Co、Ni、Cu、Zn、Cr、Mn)

Li₂O 1～2 SiO₂9.5～17；

⑵ the panel pigment comprises the following components in parts by weight:

LiAl[Si₂O₆]20 parts of Co₃O₄30 parts of Cr₂O₃30 portions of

Li0₂1.4 parts of Al₂O₃20 parts of NiO 2 parts

CuO 2 parts of Fe₂O₃30 parts of (1);

⑶ the panel pigment comprises the following components in parts by weight:

Si0₂12.8 parts of Co₃O₄18 parts of Cr₂O₃30 portions of

Li0₂1.4 parts of Al₂O₃25.3 parts of NiO 2 parts

CuO 2 parts of Fe₂O₃30.3 parts;

the panel glaze comprises the following chemical components in parts by weight:

Li₂o2.5-4.2 parts of K₂O+Na₂O<3 parts of CaO and MgO, 0.5-7 parts

0-10 parts of ZnO (zinc oxide) BaCO_3:0 to 10 parts of Al₂O₃12 to 20 portions of

SiO₂60-72 parts of pigment 0.5-6 parts；

The panel pigment is added into the panel blank and the panel glaze respectively according to the color generation requirement, the addition amount is 0.5-6%, and the panel glaze is applied to the panel blank to form a laminated structure.

7. A preparation method of a heating panel material of a full-body dry-pressed porcelain induction cooker is characterized by comprising the following steps:

⑴ preparing raw materials, including preparing blank, glaze and pigment;

⑵ dry pressing the blank, the water content of the powder is less than or equal to 6%;

⑶, drying the blank in a drying kiln until the moisture content of the blank is less than or equal to 0.5%;

⑷ biscuit firing at 980-1030 deg.C;

⑸, glazing by adopting a glaze spraying or glaze pouring mode, wherein the specific gravity of the glaze spraying is 1.5 +/-0.2, the glaze pouring is also adopted, the flow rate is controlled to be 24-34 seconds at a low specific gravity of 1.6 +/-0.2, and the field adjustment is carried out by hydroxymethyl cellulose sol;

⑹ baking, placing the product under high temperature cloth, and placing on high temperature refractory plate to bake in kiln;

⑺, edging the product by an edging machine, unifying specification and edging and chamfering;

⑻ heat resistance detection, no crack when dry burning for more than 8 minutes at 20-500 ℃;

⑼ baking the qualified porcelain, pattern and trademark paper at 750-800 deg.C;

⑽ baking, inspecting appearance, and packaging.

8. The method for preparing a heating panel material of a full body dry pressing porcelain induction cooker according to claim 7, wherein the step ⑴ of preparing the blank further comprises the following steps:

(1.11) adding a coloring material and a binding agent into the blank, wherein the binding agent is selected from polysaccharide starch and/or a high polymer material similar to polyvinyl acetate;

(1.12) ball-milling the ingredients until the fineness of 325 and the screen residue are less than or equal to 1 percent;

(1.13) pulverizing, wherein 40-100 meshes of powder particles are more than or equal to 95%;

(1.14) ageing for more than or equal to 24 hours for later use.

9. The method for preparing a heating panel material of a full body dry pressing porcelain induction cooker according to claim 6, wherein the preparation of the glaze material in step ⑴ further comprises the following steps:

(1.21) preparing materials, wherein the panel glaze consists of the following components in parts by weight:

0-60 parts of spodumene, 0-70 parts of petalite and 0-10 parts of calcined zinc oxide

0-10 parts of barium carbonate, 0-10 parts of calcite (or limestone) and 15-35 parts of fused quartz

4-10 parts of kaolin, 0-25 parts of frit and 0.5-6 parts of pigment;

the panel glaze comprises the following chemical components in parts by weight:

Li₂o2.5-4.2 parts of K₂O+Na₂O<3 parts of CaO and MgO, 0.5-7 parts

0-10 parts of ZnO (zinc oxide) BaCO_3:0 to 10 parts of Al₂O₃12 to 20 portions of

Si₂60-72 parts of O and 0.5-6 parts of pigment

(1.22) ball milling: material preparation: ball stones: water 1: 1.75-2: 0.5;

(1.23) detecting the fineness of 325 sieve taking 0.1-0.3%, the flow rate aperture is 4mm 60-80S/100 ml, and the specific gravity is more than or equal to 1.75 g/ml;

(1.24) sieving with a 120-mesh sieve for later use.

10. The method for preparing a heating panel material of a full body dry pressing porcelain induction cooker according to claim 7, wherein the step ⑴ of preparing the pigment further comprises the following steps:

(1.31) preparing materials, wherein the panel pigment consists of the following components in parts by weight:

15-30 parts of spodumene, 20-30 parts of alumina or silicon dioxide carrier

0-5 parts of a mineralizer, 30-60 parts of an oxide or carbonate of a transition metal;

the black material chemical composition of the panel is selected from one of the following components:

⑴ the panel black pigment comprises the following chemical components in parts by weight:

Al₂O₃20～30 RO+RO₂+R₂O₃+R₃O₄＝30～60(R：Fe、Co、Ni、Cu、Zn、Cr、Mn)

Li₂O 1～2 SiO₂9.5～17；

⑵ the panel black pigment comprises the following chemical components in parts by weight:

LiAl[Si₂O₆]20 parts of Co₃O₄30 parts of Cr₂O₃30 portions of

Li0₂1.4 parts of Al₂O₃20 parts of NiO 2 parts

CuO 2 parts of Fe₂O₃30 parts of (1);

⑶ the panel black pigment comprises the following chemical components in parts by weight:

Si0₂12.8 parts of Co₃O₄18 parts of Cr₂O₃30 portions of

Li0₂1.4 parts of Al₂O₃25.3 parts of NiO 2 parts

CuO 2 parts of Fe₂O₃30.3 parts;

(1.32) Dry blending: feeding materials according to the formula by using a mixer, mixing and grinding for 1 hour, and discharging and sieving by using a 80-mesh sieve;

(1.33) calcination: the calcination temperature is 1250-1280 ℃, and the heat preservation time is more than or equal to 1 hour;

(1.34) dry grinding and sieving with a 325-mesh sieve;

and (1.35) standby.

Technical Field

The invention relates to the technical field of new materials, in particular to a heating panel material of a full-body dry-pressed porcelain induction cooker and a preparation method thereof.

Background

The heating panel material of the induction cooker has high heat resistance and favorable penetration performance of electromagnetic waves. A glass-ceramic plate or a high water absorption refractory ceramic plate is generally used. The former is expensive for high quality and the appearance of the product is only monotonous black. The latter is rough in material, low in product strength and easy to damage.

Disclosure of Invention

The invention aims to provide a whole body dry pressing porcelain induction cooker heating panel material which selects various low expansion raw materials, performs a large amount of formula optimization experiments to obtain a porcelain material with low expansion suitable for being heated and used by an induction cooker, synchronously uses dry pressing to manufacture a whole body or a pattern, can be glazed and can polish or polish the glaze, and a preparation method thereof.

The technical scheme of the invention is that the heating panel material of the full-body dry-pressed porcelain electromagnetic oven is characterized in that the panel blank comprises the following components in parts by weight:

30-60 parts of spodumene, 0-20 parts of cordierite and 0-20 parts of flint clay

0-20 parts of calcined kaolin, 10-30 parts of kaolin and 0-20 parts of fused quartz

0-4 parts of alkaline earth metal mineral and 0.5-6 parts of pigment;

the panel pigment comprises the following components in parts by weight:

15-30 parts of spodumene, 20-30 parts of alumina or silicon dioxide carrier

0-5 parts of a mineralizer, 30-60 parts of an oxide or carbonate of a transition metal;

the panel glaze comprises the following components in parts by weight:

0-60 parts of spodumene, 0-70 parts of petalite and 0-10 parts of calcined zinc oxide

0-10 parts of barium carbonate, 0-10 parts of calcite (or limestone) and 15-35 parts of fused quartz

4-10 parts of kaolin, 0-25 parts of frit and 0.5-6 parts of pigment;

the panel pigment is added into the panel blank and the panel glaze respectively according to the color generation requirement, the addition amount is 0-6%, and the panel glaze is applied to the panel blank to form a laminated structure.

Preferably, the method comprises the following steps: after the panel blank, the panel pigment and the panel glaze are calcined into porcelain, the linear thermal foot expansion coefficient is less than or equal to 2.5X 10^ 6/° C, the panel is vitrified, and the water absorption is less than or equal to 0.5 percent; glazing amount: 100 grams per square meter to 150 grams per square meter (dry weight); the sintering temperature is 1240 ℃ to 1270 ℃, and the heat preservation is more than 1.5 hours.

Preferably, the method comprises the following steps: the panel pigment comprises the following chemical components in parts by weight:

LiAl[Si₂O₆]20 parts of Co₃O₄30 parts of Cr₂O₃30 portions of

Li0₂1.4 parts of Al₂O₃20 parts of NiO 2 parts

CuO 2 parts of Fe₂O₃30 parts of.

Preferably, the method comprises the following steps: the panel pigment comprises the following chemical components in parts by weight:

Si0₂12.8 parts of Co₃O₄18 parts of Cr₂O₃30 portions of

Li0₂1.4 parts of Al₂O₃25.3 parts of NiO 2 parts

CuO 2 parts of Fe₂O₃30.3 parts.

Preferably, the method comprises the following steps: the panel pigment comprises the following chemical components in parts by weight:

Al₂O₃20～30 RO+RO₂+R₂O₃+R₃O₄＝30～60(R：Fe、Co、Ni、Cu、Zn、Cr、Mn)

Li₂O 1～2 SiO₂9.5～17。

the other technical proposal of the invention is that the heating panel material of the whole body dry-pressed porcelain induction cooker is characterized in that,

the chemical composition of the panel blank is selected from one of the following components:

⑴ the chemical components of the panel blank comprise the following components in parts by weight:

Li₂o2-4 parts of K₂O+Na₂O<1 part of CaO<1 part of

0.3-3 parts of MgO by weight of Al₂O₃22-28 parts of Si₂65 to 70 portions of O

0.5-6 parts of a pigment;

⑵ the chemical components of the panel blank comprise the following components in parts by weight:

Li₂o2-4 parts of K₂O+Na₂O<1 part of CaO<1 part of

0.3 to 3 parts of MgO by weight of Al₂O₃22-28 parts of Si₂65 to 70 portions of O

0.5-6 parts of a pigment;

the panel pigment chemical composition is selected from one of the following components:

⑴ the panel pigment comprises the following components in parts by weight:

Al₂O₃20～30 RO+RO₂+R₂O₃+R₃O₄＝30～60(R：Fe、Co、Ni、Cu、Zn、Cr、Mn)

Li₂O 1～2 SiO₂9.5～17；

⑵ the panel pigment comprises the following components in parts by weight:

LiAl[Si₂O₆]20 parts of Co₃O₄30 parts of Cr₂O₃30 portions of

Li0₂1.4 parts of Al₂O₃20 parts of NiO 2 parts

CuO 2 parts of Fe₂O₃30 parts of (1);

⑶ the panel pigment comprises the following components in parts by weight:

Si0₂12.8 parts of Co₃O₄18 parts of Cr₂O₃30 portions of

Li0₂1.4 parts of Al₂O₃25.3 parts of NiO 2 parts

CuO 2 parts of Fe₂O₃30.3 parts;

the panel glaze comprises the following chemical components in parts by weight:

Li₂o2.5-4.2 parts of K₂O+Na₂O<3 parts of CaO and MgO, 0.5-7 parts

0-10 parts of ZnO (zinc oxide) BaCO₃0 to 10 parts of Al₂O₃12 to 20 portions of

SiO₂60-72 parts of pigment 0.5-6 parts;

the panel pigment is added into the panel blank and the panel glaze respectively according to the color generation requirement, the addition amount is 0.5-6%, and the panel glaze is applied to the panel blank to form a laminated structure.

Preferably, the method comprises the following steps: the panel pigment further comprises the following chemical components in parts by weight

Al₂O₃20～30 RO+RO₂+R₂O₃+R₃O₄＝30～60(R：Fe、Co、Ni、Cu、Zn、Cr、Mn)

Li₂O 1～2 SiO₂9.5～17。

The invention also discloses a preparation method of the heating panel material of the whole body dry-pressed porcelain induction cooker, which is characterized by comprising the following steps:

⑴ preparing raw materials, including preparing blank, glaze and pigment;

⑵ dry pressing the blank, the water content of the powder is less than or equal to 6%;

⑶, drying the blank in a drying kiln until the moisture content of the blank is less than or equal to 0.5%;

⑷ biscuit firing at 980-1030 deg.C;

⑸, glazing by adopting a glaze spraying or glaze pouring mode, wherein the specific gravity of the glaze spraying is 1.5 +/-0.2, the glaze pouring is also adopted, the flow rate is controlled to be 24-34 seconds at a low specific gravity of 1.6 +/-0.2, and the field adjustment is carried out by hydroxymethyl cellulose sol;

⑹ baking, placing the product under high temperature cloth, and placing on high temperature refractory plate to bake in kiln;

⑺, edging the product by an edging machine, unifying specification and edging and chamfering;

⑻ heat resistance detection, no crack when dry burning for more than 8 minutes at 20-500 ℃;

⑼ baking the qualified porcelain, pattern and trademark paper at 750-800 deg.C;

⑽ baking, inspecting appearance, and packaging.

Preferably, the preparation of the billet in step ⑴ further comprises the steps of:

(1.11) adding a coloring material and a binding agent into the blank, wherein the binding agent is selected from polysaccharide starch and/or a high polymer material similar to polyvinyl acetate;

(1.12) ball-milling the ingredients until the fineness of 325 and the screen residue are less than or equal to 1 percent;

(1.13) pulverizing, wherein 40-100 meshes of powder particles are more than or equal to 95%;

(1.14) ageing for more than or equal to 24 hours for later use.

Preferably, the preparation of the glaze in step ⑴ further comprises the following steps:

(1.21) preparing materials, wherein the panel glaze consists of the following components in parts by weight:

0-60 parts of spodumene, 0-70 parts of petalite and 0-10 parts of calcined zinc oxide

0-10 parts of barium carbonate, 0-10 parts of calcite (or limestone) and 15-35 parts of fused quartz

4-10 parts of kaolin, 0-25 parts of frit and 0.5-6 parts of pigment;

the panel glaze comprises the following chemical components in parts by weight:

Li₂o2.5-4.2 parts of K₂O+Na₂O<3 parts of CaO and MgO, 0.5-7 parts

0-10 parts of ZnO (zinc oxide) BaCO₃0 to 10 parts of Al₂O₃12 to 20 portions of

Si₂60-72 parts of O and 0.5-6 parts of pigment

(1.22) ball milling: material preparation: ball stones: water 1: 1.75-2: 0.5;

(1.23) detecting the fineness of 325 sieve taking 0.1-0.3%, the flow rate aperture is 4mm 60-80S/100 ml, and the specific gravity is more than or equal to 1.75 g/ml;

(1.24) sieving with a 120-mesh sieve for later use.

Preferably, the step ⑴ of preparing the colorant further comprises the steps of:

(1.31) preparing materials, wherein the panel pigment consists of the following components in parts by weight:

15-30 parts of spodumene, 20-30 parts of alumina or silicon dioxide carrier

0-5 parts of a mineralizer, 30-60 parts of an oxide or carbonate of a transition metal;

the black material chemical composition of the panel is selected from one of the following components:

⑴ the panel black pigment comprises the following chemical components in parts by weight:

Al₂O₃20～30 RO+RO₂+R₂O₃+R₃O₄＝30～60(R：Fe、Co、Ni、Cu、Zn、Cr、Mn)

Li₂O 1～2 SiO₂9.5～17；

⑵ the panel black pigment comprises the following chemical components in parts by weight:

LiAl[Si₂O₆]20 parts of Co₃O₄30 parts of Cr₂O₃30 portions of

Li0₂1.4 parts of Al₂O₃20 parts of NiO 2 parts

CuO 2 parts of Fe₂O₃30 parts of (1);

⑶ the panel black pigment comprises the following chemical components in parts by weight:

Si0₂12.8 parts of Co₃O₄18 parts of Cr₂O₃30 portions of

Li0₂1.4 parts of Al₂O₃25.3 parts of NiO 2 parts

CuO 2 parts of Fe₂O₃30.3 parts;

(1.32) Dry blending: feeding materials according to the formula by using a mixer, mixing and grinding for 1 hour, and discharging and sieving by using a 80-mesh sieve;

(1.33) calcination: the calcination temperature is 1250-1280 ℃, and the heat preservation time is more than or equal to 1 hour;

(1.34) dry grinding and sieving with a 325-mesh sieve;

and (1.35) standby.

Compared with the prior art, the invention has the beneficial effects that:

⑴ the formula of the heating panel (or the formula of glaze and pigment) of the whole body dry pressing porcelain induction cooker can produce a durable induction cooker heating panel which has good electromagnetic wave penetrating performance, is suitable for different powers of induction cookers, can resist the requirements of rapid cooling and rapid heating at normal temperature of-800 ℃ and can not crack at normal temperature of-500 ℃.

⑵ the heating panel material of the whole body dry pressing porcelain electromagnetic oven provided by the invention uses panel ingredients synchronously, and the panel glaze material and panel pigment can produce whole body, pattern blank, spot blank, and polishing, colored glaze decoration, glazing decoration, polishing decoration, etc. of various blanks, which are combined with the outer shell of the electromagnetic oven to form various special commodities.

⑶ the heating panel material of the whole body dry pressing porcelain induction cooker has the flexural strength more than or equal to 30MPa, the Mohs hardness more than or equal to 4 grade, the stain resistance 5 grade and the acid and alkali resistance GLA grade.

⑷ the process requirement range of the glazing amount of the whole body dry pressing porcelain electromagnetic oven heating panel material provided by the invention is 100 g/square meter to 150 g/square meter (dry weight), and the glaze quality, appearance and thermal stability of the product are ensured in the range.

⑸ the invention provides a heating panel material of a whole body dry pressing porcelain electromagnetic oven, the highest temperature range of the firing is 1240-1270 ℃, the high temperature is kept for more than 1.5 hours, the heating panel material is cooled from the highest temperature to 1100 ℃ for not less than 45 minutes, and the sufficient amount of low thermal expansion solid solution precipitation and the porcelainized water absorption rate of the panel ceramic microstructure are ensured to be less than or equal to 0.5 percent.

⑹ the invention can be used to enhance the forming ability of the green body, which is different from the common wall brick by the combination of clay and water to ensure the forming ability of the green body.

Detailed Description

The invention will be further described in detail with reference to the following examples:

the heating panel material of the whole dry-pressed porcelain induction cooker comprises the following components in parts by weight:

spodumene 30 parts cordierite 15 parts calcined kaolin 6 parts

30 parts of kaolin, 15 parts of fused quartz and 5 parts of petalite

4 parts of a pigment;

the panel blank comprises the following chemical components in parts by weight:

Li₂o2.43 parts of K₂O+Na₂O<0.54 part of CaO<0.11 portion

MgO 2.05 parts Al₂O₃27.5 parts of Si₂O63.23 parts

Fe₂O₃0.45 TiO₂0.27 part of black pigment and 4 percent of

The panel glaze comprises the following components in parts by weight:

47 parts of spodumene, 5 parts of petalite and 3 parts of barium carbonate

Calcite 7 parts of fused quartz 28 parts of kaolin 4 parts

6 parts of a black pigment;

the panel glaze comprises the following chemical components in parts by weight:

Li₂o4.04 parts of K₂O+Na₂O<0.1 part of CaO + MgO 4 parts

BaCO₃2.2 parts of Al₂O₃16.2 parts of SiO₂70.4 portions

Adding 6 parts of black pigment;

the panel black pigment comprises the following chemical components in parts by weight:

Si0₂12.8 parts of Co₃O₄18 parts of Cr₂O₃30 portions of

Li0₂1.4 parts of Al₂O₃25.3 parts of NiO 2 parts

CuO 2 parts of Fe₂O₃30.3 parts.

In another embodiment, the panel black pigment comprises the following chemical components in parts by weight:

the panel black pigment is added into the panel blank and the panel glaze respectively according to the formula proportion requirement, and the panel glaze is applied to the panel blank to form a laminated structure.

In the embodiment, after the panel blank, the panel pigment and the panel glaze are calcined into the porcelain, the linear thermal foot expansion coefficient is less than or equal to 2.5X 10^ -6/° C, the panel is vitrified, and the water absorption is less than or equal to 0.5%.

In this example, the amount of glazing: 18g to 20g per block, and the glaze spraying specific gravity is 1.5 g/ml.

In the embodiment, the firing temperature is 1260-1270 ℃, and the high-temperature heat preservation is carried out for more than 1.5 hours.

The preparation method of the heating panel material of the whole body dry-pressed porcelain induction cooker comprises the following steps:

⑴ preparing raw materials, including preparing blank, glaze and pigment;

⑵ dry pressing the blank, the water content of the powder is less than or equal to 6%;

⑶ drying, drying the blank in a drying kiln until the water content is less than or equal to 0.5%;

⑷ biscuit firing, wherein the biscuit firing is carried out after drying, and the biscuit firing temperature is 1020 +/-5 ℃;

⑸ glazing by spraying glaze;

⑹ calcining by placing the lower high-temperature cloth (mainly made of alumina refractory) on a high-temperature refractory plate in a kiln;

⑺, edging the product by an edging machine, unifying specification and edging and chamfering;

⑻ heat resistance detection, no crack when dry burning for more than 8 minutes at 20-500 ℃;

⑼ baking decoration, namely baking the qualified synthetic porcelain, the pasted pattern and the trademark stained paper at the temperature of 750-800 ℃;

⑽ baking, inspecting appearance, and packaging.

The preparation of the blank in the step ⑴ further comprises the following procedures:

(1.11) adding a coloring material and a bonding agent into the blank, wherein the bonding agent is selected from polysaccharide starch and high polymer materials similar to polyvinyl acetate ethanol, and the adding amount is 0.5%;

(1.12) ball-milling the ingredients until the fineness of 325 and the screen residue are less than or equal to 1 percent;

(1.13) pulverizing, wherein the powder particles are 40-100 meshes and are more than or equal to 95% long;

(1.14) ageing for more than 24 hours for later use;

the preparation of the glaze in step ⑴ further comprises the following steps:

(1.21) preparing materials, wherein the panel glaze consists of the following components in parts by weight:

47 parts of spodumene, 5 parts of petalite and 3 parts of barium carbonate

Calcite 7 parts of fused quartz 28 parts of kaolin 4 parts

6 parts of a black pigment;

the panel glaze comprises the following chemical components in parts by weight:

Li₂o4.04 parts of K₂O+Na₂O<0.1 part of CaO + MgO 4 parts

BaCO₃2.2 parts of Al₂O₃16.2 parts of SiO₂70.4 portions

Adding 6 parts of black pigment;

(1.22) ball milling: material preparation: ball stones: water 1: 2: 0.5

(1.23) detection fineness: 0.1-0.3% of 325-mesh screen residue, a flow rate aperture of 4mm of 60-80S/100 ml and a specific gravity of 1.75 g/ml;

(1.24) sieving by a 120-mesh sieve for later use;

wherein the step ⑴ of preparing the colorant further comprises the following steps:

(1.31) preparing materials, wherein the panel black pigment comprises the following components in parts by weight:

spodumene 20 parts alumina 20 parts

2 parts of mineralizer, 2 parts of transition metal oxide or carbonate;

the panel black pigment comprises the following chemical components in parts by weight:

LiAl[Si₂O₆]20 parts of Co₃O₄30 parts of Cr₂O₃30 portions of

Li0₂1.4 parts of Al₂O₃20 parts of NiO 2 parts

CuO 2 parts of Fe₂O₃30 parts of (1);

in another embodiment, the chemical components of the panel color material comprise the following components in parts by weight:

(1.32) Dry blending: feeding materials according to the formula by using a mixer, mixing and grinding for 1 hour, and discharging and sieving by using a 80-mesh sieve;

(1.33) calcination: calcining at 1280 ℃ for more than or equal to 1 hour;

(1.34) dry grinding: the fineness of the powder is all 325 meshes;

and (1.34) standby.

The above-mentioned embodiments are only preferred embodiments of the present invention, and all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.