阅读说明：本技术 一种电瓷绝缘子及其制备方法 (Electric porcelain insulator and preparation method thereof ) 是由 欧阳方友 于 2019-12-10 设计创作，主要内容包括：本发明公开了一种电瓷绝缘子,包括以下重量份的原料：改性陶瓷55-65份、叶腊石20-30份、黏土10-20份、活性二氧化硅4-10份、硅灰石2-5份；改性陶瓷的制备方法为将陶瓷先采用质子辐照处理,然后加入到球磨机中进行研磨,先以100-200r/min的转速进行研磨10min。本发明的陶瓷采用改性的方法将其与叶腊石、黏土等组合,叶腊石具有高的耐温性能,而活性二氧化硅在煅烧等条件下具有活化能力,提高原料间的组合效果,硅灰石具有针状结构,能够穿插到材料中,从而完善材料的韧性、耐冲击、耐高温等性能。(The invention discloses an electric porcelain insulator which comprises the following raw materials in parts by weight: 55-65 parts of modified ceramic, 20-30 parts of pyrophyllite, 10-20 parts of clay, 4-10 parts of active silicon dioxide and 2-5 parts of wollastonite; the preparation method of the modified ceramic comprises the steps of firstly carrying out proton irradiation treatment on the ceramic, then adding the treated ceramic into a ball mill for grinding, and firstly grinding for 10min at the rotating speed of 100-200 r/min. The ceramic is combined with pyrophyllite, clay and the like by a modification method, the pyrophyllite has high temperature resistance, the active silica has activation capacity under the conditions of calcination and the like, the combination effect among raw materials is improved, and wollastonite has a needle-shaped structure and can be inserted into the material, so that the properties of toughness, impact resistance, high temperature resistance and the like of the material are improved.)

1. The electric porcelain insulator is characterized by comprising the following raw materials in parts by weight:

55-65 parts of modified ceramic, 20-30 parts of pyrophyllite, 10-20 parts of clay, 4-10 parts of active silicon dioxide and 2-5 parts of wollastonite; the preparation method of the modified ceramic comprises the steps of firstly carrying out proton irradiation treatment on the ceramic, then adding the treated ceramic into a ball mill for grinding, grinding for 10min at the rotating speed of 100-200r/min, then adding a rubber modifier, grinding for 30-40min at the rotating speed of 200-600r/min, sending the obtained grinding slurry into a stainless steel autoclave for sealing, then carrying out reaction for 15-17h at the temperature of 120-130 ℃, then cooling to room temperature, centrifuging the solution for 15-25min at the rotating speed of 6000-8000r/min, sending the obtained slurry into a calcining furnace for calcining for 10-20min at the calcining temperature of 200-300 ℃ to obtain the modified ceramic.

2. The electric porcelain insulator according to claim 1, wherein the electric porcelain insulator comprises the following raw materials in percentage by weight:

57-62 parts of modified ceramic, 23-28 parts of pyrophyllite, 14-17 parts of clay, 5-8 parts of active silicon dioxide and 3-4 parts of wollastonite.

3. The electric porcelain insulator according to claim 1, wherein the electric porcelain insulator comprises the following raw materials in percentage by weight:

60 parts of modified ceramic, 25 parts of pyrophyllite, 15 parts of clay, 7 parts of active silicon dioxide and 3.5 parts of wollastonite.

4. The electrical porcelain insulator according to claim 1, wherein the energy of protons upon irradiation is 140-150keV, and the number of protons incident at each energy is 8-10 x 10 ³And (4) respectively.

5. The insulator according to claim 4, wherein the energy of the protons upon irradiation is 145keV, and the number of protons incident at each energy is 9 x 10 ³And (4) respectively.

6. The electric porcelain insulator according to claim 1, wherein the rubber modifier is prepared by adding phenyl silicone rubber to an acetone solvent, and then using ⁶⁰Co _rIrradiating with a radiation source at 200-Irradiating with w power for 20-30min, irradiating with 1000Kw power for 15min, adding modified Arecae semen, adding silane coupling agent KH560, stirring at 200-.

7. The electric porcelain insulator according to claim 6, wherein the modified betel nut is prepared by mashing betel nuts, draining, drying in an oven at 55-65 ℃ for 40-50min, and then irradiating with plasma at 500-1000W for 10-20 min.

8. The electrical porcelain insulator according to claim 1, wherein the clay is a combination of one or more of montmorillonite, illite, and kaolinite.

9. A method for manufacturing an electric porcelain insulator according to any one of claims 1 to 8, comprising the steps of:

step one, weighing the following raw materials in parts by weight:

and step two, sequentially adding the raw materials into a high-speed stirrer, stirring at the rotating speed of 550-.

10. The method as claimed in claim 9, wherein the hot press sintering temperature is 300-600 ℃, the sintering pressure is 10-30MPa, and the sintering time is 30-40 min.

Technical Field

The invention relates to the technical field of electric porcelain insulators, in particular to an electric porcelain insulator and a preparation method thereof.

Background

The insulator is a special insulating control, can play an important role in an overhead transmission line, and plays two basic roles in the overhead transmission line, namely supporting a wire and preventing current from flowing back to the ground, and is usually made of glass or ceramic in order to increase the creepage distance. In practical application, the porcelain insulator has advantages in weather resistance, mechanical strength, cost and the like, so that the porcelain insulator is widely applied. Porcelain insulators are classified into various types, and can be classified into pillar (post) insulators, suspension insulators, pin insulators, butterfly insulators and tensioning insulators according to structures.

Most of electric porcelain insulators used on the traditional electric locomotive are compounded by rubber and resin, the composite material has poor high-temperature-resistant obvious effect, most of the prior electric porcelain insulators are insulators formed by compounding ceramics and ores, for example, Chinese patent document publication No. CN108101526A discloses an electric porcelain insulator and a preparation method thereof, and the electric porcelain insulator comprises the following raw materials in parts by mass: 40-60 parts of ceramic powder, 20-30 parts of mullite powder, 3-8 parts of mineralizer, 8-15 parts of dispersant, 0.5-1 part of forming agent and 2-12 parts of rare earth dopant; the preparation method of the electric porcelain insulator comprises the following steps: wet mixing: putting the ceramic powder, the mullite powder, the mineralizer and the rare earth dopant into a mixer for mixing uniformly to obtain a mixed material; drying; the high temperature resistance of the electric porcelain insulator is obviously improved, but the toughness and the impact resistance are deteriorated, and the coordination of the toughness and the impact resistance is the main direction of the research of the invention on the improvement of the high temperature performance by blending rubber, resin materials, ceramics and other materials.

Disclosure of Invention

The invention aims to provide an electric porcelain insulator and a preparation method thereof, which aim to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

an electric porcelain insulator comprises the following raw materials in parts by weight:

55-65 parts of modified ceramic, 20-30 parts of pyrophyllite, 10-20 parts of clay, 4-10 parts of active silicon dioxide and 2-5 parts of wollastonite; the preparation method of the modified ceramic comprises the steps of firstly carrying out proton irradiation treatment on the ceramic, then adding the treated ceramic into a ball mill for grinding, grinding for 10min at the rotating speed of 100-200r/min, then adding a rubber modifier, grinding for 30-40min at the rotating speed of 200-600r/min, sending the obtained grinding slurry into a stainless steel autoclave for sealing, then carrying out reaction for 15-17h at the temperature of 120-130 ℃, then cooling to room temperature, centrifuging the solution for 15-25min at the rotating speed of 6000-8000r/min, sending the obtained slurry into a calcining furnace for calcining for 10-20min at the calcining temperature of 200-300 ℃ to obtain the modified ceramic.

Preferably, the electric porcelain insulator comprises the following raw materials in percentage by weight:

57-62 parts of modified ceramic, 23-28 parts of pyrophyllite, 14-17 parts of clay, 5-8 parts of active silicon dioxide and 3-4 parts of wollastonite.

Preferably, the electric porcelain insulator comprises the following raw materials in percentage by weight:

60 parts of modified ceramic, 25 parts of pyrophyllite, 15 parts of clay, 7 parts of active silicon dioxide and 3.5 parts of wollastonite.

Preferably, the energy of the proton upon the proton irradiation is 140-150keV, and the number of the incident protons at each energy is 8-10 × 10 ³And (4) respectively.

Preferably, the energy of the proton when the proton is irradiated is 145keV, and the number of incident protons at each energy is 9 × 10 ³And (4) respectively.

Preferably, the rubber modifier in the preparation method of the modified ceramic is prepared by adding phenyl silicone rubber into an acetone solvent and then adopting ⁶⁰Co _rIrradiating by a radiation source, namely irradiating for 20-30min at the power of 200-500Kw, then irradiating for 15min at the power of 1000Kw, ending the irradiation, adding the modified betel nut, then adding the silane coupling agent KH560, stirring for 20-30min at the rotating speed of 200-1000r/min, finally adding the nano metal aluminum, and continuously stirring for 40-50min to obtain the rubber modifier.

Preferably, the preparation method of the modified betel nut comprises the steps of firstly mashing the betel nut, then draining, placing in an oven for drying for 40-50min, wherein the drying temperature is 55-65 ℃, and then adopting plasma for irradiation for 10-20min, and the irradiation power is 500-1000W.

Preferably, the clay is one or more of montmorillonite, illite and kaolinite.

The invention also provides a method for preparing the electric porcelain insulator, which comprises the following steps:

step one, weighing the following raw materials in parts by weight:

and step two, sequentially adding the raw materials into a high-speed stirrer, stirring at the rotating speed of 550-.

Preferably, the temperature of the hot-pressing sintering is 300-.

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

(1) the ceramic is combined with pyrophyllite, clay and the like by a modification method, the pyrophyllite has high temperature resistance, the active silica has activation capacity under the conditions of calcination and the like, the combination effect among raw materials is improved, and wollastonite has a needle-shaped structure and can be inserted into the material, so that the properties of toughness, impact resistance, high temperature resistance and the like of the material are improved.

(2) The proton irradiation treatment is firstly adopted for ceramic, so that the matrix structure is loosened, the modification treatment is convenient, the rubber modifier added in the grinding process adopts the phenyl silicone rubber as the matrix, the phenyl silicone rubber can continuously permeate into the loosened ceramic structure in the grinding process, so that the toughness and the impact strength of the ceramic matrix are improved, the modified betel nut can play a grinding assisting effect, a large amount of fibers in the betel nut are inserted into the ceramic to destroy the microstructure of the ceramic, so that the modification effect of the phenyl silicone rubber is improved, and finally, the surface structure of the ceramic is perfected by calcining, so that the overall performance of the ceramic is improved.

(3) The impact resistance improvement rate of the embodiment 3 of the invention is 35.9%, and the temperature resistance improvement rate is 29.9%, while the impact resistance improvement rate of the comparative example 2 is 24.3%, and the temperature resistance improvement rate is 25.1%, so that the impact resistance and the temperature resistance of the invention are obviously improved, and the impact resistance and the temperature resistance can be coordinately improved.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to specific embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.