阅读说明：本技术 一种晶瓷玻璃餐具热处理工艺 (Heat treatment process for crystal porcelain glass tableware ) 是由 张小苏 于 2018-06-26 设计创作，主要内容包括：一种晶瓷玻璃餐具热处理工艺,其配方的重量百分比组成为：SiO<Sub>2</Sub>：51.5～64％、P<Sub>2</Sub>O<Sub>5</Sub>：6.8～11％、Li<Sub>2</Sub>O：3～5.2％、MgO：0.5～2.2％、ZnO：0.4～2.1％、CaO：0.2～2.5％、BaO：0.5～4.5％、SrO：0.2～3％、Sb<Sub>2</Sub>O<Sub>3</Sub>：0.6～2％、Al<Sub>2</Sub>O<Sub>3</Sub>、TiO<Sub>2</Sub>和ZrO<Sub>2</Sub>,所述Al<Sub>2</Sub>O<Sub>3</Sub>和SiO<Sub>2</Sub>的重量百分比之和为75～84％,所述TiO<Sub>2</Sub>和ZrO<Sub>2</Sub>的重量百分比之和为3.5～5％。由于本发明对玻璃餐具热处理的温度和时间进行精确控制,有效地去除了玻璃餐具中的热应力和残余应力,提高了玻璃餐具的力学强度、抗冷热性能和抗冲击能力,有效地解决了玻璃餐具发生自行爆裂的现象。(A heat treatment process for crystal porcelain glass tableware comprises the following components in percentage by weight: SiO 2 2 ：51.5～64％、P 2 O 5 ：6.8～11％、Li 2 O：3～5.2％、MgO：0.5～2.2％、ZnO：0.4～2.1％、CaO：0.2～2.5％、BaO：0.5～4.5％、SrO：0.2～3％、Sb 2 O 3 ：0.6～2％、Al 2 O 3 、TiO 2 And ZrO 2 Said Al 2 O 3 And SiO 2 The sum of the weight percentages of the components is 75-84%, and the TiO is 2 And ZrO 2 The sum of the weight percentages of the components is 3.5-5%. The invention accurately controls the temperature and time of the heat treatment of the glass tableware, effectively removes the thermal stress and residual stress in the glass tableware, improves the mechanical strength, cold and hot resistance and impact resistance of the glass tableware, and effectively solves the phenomenon of self-bursting of the glass tableware.)

1. A heat treatment process for crystal porcelain glass tableware comprises the following components in percentage by weight: SiO 2₂：51.5～64％、P₂O₅：6.8～11％、Li₂O：3～5.2％、MgO：0.5～2.2％、ZnO：0.4～2.1％、CaO：0.2～2.5％、BaO：0.5～4.5％、SrO：0.2～3％、Sb₂O₃：0.6～2％、Al₂O₃、TiO₂And ZrO₂Said Al₂O₃And SiO₂The sum of the weight percentages of the components is 75-84%, and the TiO is₂And ZrO₂The sum of the weight percentages of the components is 3.5-5%.

2. The invention accurately controls the temperature and time of the heat treatment of the glass tableware, effectively removes the thermal stress and residual stress in the glass tableware, improves the mechanical strength, cold and hot resistance and impact resistance of the glass tableware, and effectively solves the phenomenon of self-bursting of the glass tableware.

Technical Field

The invention belongs to the technical field of glassware, and particularly relates to a heat treatment process for crystal porcelain glass tableware.

Background

Glass is a poor conductor of heat and, when heated or cooled, will undergo drastic and uneven temperature variations, creating considerable temperature differences within the glass. The prior tempered glass ware production process mostly adopts a tempering process taking air as a cooling medium, so that the heated glass ware is chilled in a short time by a large amount of air, thereby completing the tempering process. Japanese patent laid-open Nos. 2005-89272 and 2005-231994 disclose two kinds of low expansion coefficient glass ceramics, which do not contain SrO in the chemical composition, and the crystallization tendency and the ease of forming are not clear. The existing heat treatment method for the microcrystalline glass with the low expansion coefficient is mainly a two-step method, and the method is mainly used for carrying out heat treatment on thin plates or small pieces of glass which require rapid heat treatment and is difficult to carry out heat treatment on glass tableware.

Disclosure of Invention

The invention aims to provide a heat treatment process for crystal porcelain glass tableware, which ensures that the surface stress of the glass tableware is uniform, and the curvature, the fragment and the tempering degree meet the requirements. The technical scheme is as follows:

(1) a toughened crystal porcelain glass tableware comprises the following components in percentage by weight: SiO 2₂：51.5～64％、P₂O₅：6.8～11％、Li₂O：3～5.2％、MgO：0.5～2.2％、ZnO：0.4～2.1％、CaO：0.2～2.5％、BaO：0.5～4.5％、SrO：0.2～3％、Sb₂O₃：0.6～2％、Al₂O₃、TiO₂And ZrO₂Said Al₂O₃And SiO₂The sum of the weight percentages of the components is 75-84%, and the TiO is₂And ZrO₂The sum of the weight percentages of the components is 3.5-5%;

(2) calculating oxides, carbonates and enough nitrates adopted by the batch according to the weight percentage, accurately weighing and uniformly mixing to obtain a glass batch; adding the batch materials into a glass smelting furnace heated to 1540-1580 ℃, fully stirring for many times in the melting process, heating to 1580-1600 ℃, clarifying, homogenizing and cooling, pouring molten glass into a mold, and cooling to room temperature through rough annealing;

(3) placing the product in a heat treatment furnace for heat treatment: keeping the temperature of the crystal ceramic tableware in a furnace at 520-650 ℃ for 0.5-2 h to ensure that the glass casting is uniform in temperature and stress is eliminated; then raising the temperature to 720-780 ℃ at a speed of less than or equal to 5 ℃/min, preserving the temperature for 0.5-4 h, and carrying out nucleation treatment; then raising the temperature to 820-850 ℃ at a speed of less than or equal to 5 ℃/min, and preserving the temperature for 0.5-2 h to carry out primary crystallization treatment; then heating to 900-920 ℃ at a speed of 15-20 ℃/min, preserving heat for 0.5-1 h, and carrying out second crystallization treatment; then cooling to 520-650 ℃ at a speed of 15-20 ℃/min, and preserving heat for 0.5-2 h; then cooling to below 100 ℃ at a speed of 15-20 ℃/min and discharging.

The invention can control the temperature and time of heat treatment of glass tableware accurately, effectively remove the thermal stress and residual stress in glass tableware, improve the mechanical strength, cold and hot resistance and impact resistance of glass tableware, and effectively solve the self-bursting phenomenon of glass tableware.

Detailed Description

The present invention will be described in detail with reference to the following embodiments:

(1) a toughened crystal porcelain glass tableware comprises the following components in percentage by weight: SiO 2₂：62％、P₂O₅：8％、Li₂O4.5％、MgO：1.2％、ZnO：1.5％、CaO：0.8％、BaO：3％、SrO2％、Sb₂O₃：0.8％、Al₂O₃、TiO₂And ZrO₂Said Al₂O₃And SiO₂The sum of the weight percentages of the components is 80 percent, and the TiO₂And ZrO₂The sum of the weight percentages of (A) and (B) is 4%;

(2) calculating oxides, carbonates and enough nitrates adopted by the batch according to the weight percentage, accurately weighing and uniformly mixing to obtain a glass batch; adding the batch materials into a glass smelting furnace heated to 1560 ℃, fully stirring for many times in the melting process, heating to 1600 ℃ for clarification, pouring molten glass into a mold after homogenizing and cooling, and cooling to room temperature through rough annealing;

(3) placing the product in a heat treatment furnace for heat treatment: keeping the temperature of the crystal porcelain tableware in a 580 ℃ furnace for 1h to ensure that the temperature of a glass casting is equalized and stress is eliminated, then heating up at 5 ℃/min to 750 ℃, keeping the temperature for 1h, carrying out nucleation treatment, heating up at 5 ℃/min to 830 ℃, keeping the temperature for 1h, carrying out first crystallization treatment, heating up at 15 ℃/min to 900 ℃, keeping the temperature for 1h, carrying out second crystallization treatment, cooling at 15 ℃/min after crystallization treatment, keeping the temperature at 580 ℃ for 0.5h, then rapidly cooling to below 100 ℃ at 20 ℃/min, and taking out of the furnace to obtain the toughened crystal porcelain glass tableware.