Method for preparing thick-film dielectric glass powder

A technology of glass powder and medium, which is applied in the field of preparation of thick-film dielectric glass powder, can solve the problems of increasing the viscosity of silicate glass, increasing the temperature of glass melting, and unfavorable large-scale promotion, so as to reduce inclusions and reduce melting Temperature, the effect of promotion

Active Publication Date: 2013-12-04
青田县南方玻纤原料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The heterogeneous nucleating agent commonly used in CAS glass-ceramics is TiO 2 , ZrO 2 , Cr2O 3 and CaF 2 , using an appropriate amount of TiO 2 , ZrO 2 Composite crystal nucleating agent can reduce the nucleation and crystallization temperature of CAS-based glass-ceramics, and can promote crystallization to obtain better insulation performance, but due to Zr 4+ The ionic radius is larger, the ionic strength is lower, and it can significantly increase the viscosity of silicate glass and increase the glass melting temperature. At present, the melting temperature of the CAS system is mostly above 1450 ° C, and the melting time is longer (Generally about 2 hours), the high melting temperature not only brings about high energy consumption, but also has very strict requirements on refractory materials and crucibles, so the cost of the medium slurry prepared by this method is relatively high. Not conducive to large-scale promotion
[0004] Existing studies have shown that using slag, fly ash, talc powder and feldspar as raw materials to prepare CAS-based glass-ceramics can significantly reduce the melting temperature and production cost, but most of these materials contain more alkali metals and iron. Impurities, resulting in poor electrical insulation properties

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  • Method for preparing thick-film dielectric glass powder
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  • Method for preparing thick-film dielectric glass powder

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Experimental program
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Effect test

Embodiment 1

[0027] The preparation method of this thick-film dielectric glass powder is carried out according to the following steps:

[0028] The first step is to select raw materials, and the raw materials are selected according to the following components and parts by weight: 20 parts of pyrophyllite, 30 parts of limestone, 1 part of boric acid, 3 parts of titanium dioxide, 3 parts of zirconium dioxide, 2 parts of cobalt trioxide, industrial oxidation Aluminum 5 parts;

[0029] The second step is mixing and preheating. The raw materials selected in the first step are fully mixed and put into a planetary ball mill for ball milling. When the mixed raw materials are in a fine powder state, take them out and put them in a graphite crucible, and then put the graphite crucible into the working Preheat in a muffle furnace with a temperature of 230°C for 40 minutes. After the preheating is complete, put the raw material mixture into a high-temperature resistance furnace. The high-temperature r...

Embodiment 2

[0037] The preparation method of this thick-film dielectric glass powder is carried out according to the following steps:

[0038] The first step is to select raw materials, and the raw materials are selected according to the following components and weight percentages: 25 parts of pyrophyllite, 40 parts of limestone, 2 parts of boric acid, 3 parts of titanium dioxide, 3 parts of zirconium dioxide, 1 part of cobalt trioxide, industrial 6 parts of aluminum oxide;

[0039] The second step is mixing and preheating. The raw materials selected in the first step are fully mixed and put into a planetary ball mill for ball milling. When the mixed raw materials are in a fine powder state, take them out and put them in a graphite crucible, and then put the graphite crucible into the working Preheat in a muffle furnace with a temperature of 260°C for 40 minutes. After the preheating is completed, put the raw material mixture into a high-temperature resistance furnace. The high-temperatur...

Embodiment 3

[0047] The preparation method of this thick-film dielectric glass powder is carried out according to the following steps:

[0048] The first step is to select raw materials, and the raw materials are selected according to the following components and weight percentages: 30 parts of pyrophyllite, 50 parts of limestone, 1 part of boric acid, 2 parts of titanium dioxide, 2 parts of zirconium dioxide, 3 parts of cobalt trioxide, industrial 7 parts of aluminum oxide;

[0049] The second step is mixing and preheating. The raw materials selected in the first step are fully mixed and put into a planetary ball mill for ball milling. When the mixed raw materials are in a fine powder state, take them out and put them in a graphite crucible, and then put the graphite crucible into the working Preheat in a muffle furnace with a temperature of 300°C for 40 minutes. After the preheating is completed, put the raw material mixture into a high-temperature resistance furnace. The high-temperatur...

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Abstract

The invention relates to a method for preparing thick-film dielectric glass powder. The method comprises the following steps: adopting pyrophyllite and limestone as main raw materials, adding small amounts of boric acid, titanium dioxide, zirconium dioxide, cobalt sesquioxide and industrial alumina, and then performing mixing, high-temperature smelting, water quenching and grinding to prepare the thick-film dielectric glass powder. The method for preparing the thick-film dielectric glass powder has the benefits that the thick-film dielectric glass powder prepared by the method can reduce the smelting temperature of glass, can reduce energy consumption, and can reduce defects of blending impurities, local micro-cracks and the like caused by introducing a heterogeneous nucleating agent, and the insulating property and thermal shock resistance of glass media are further improved; the method is simple in operation and is easy to realize industrialization, and the thick-film dielectric glass powder has a good using effect and is beneficial to promote.

Description

technical field [0001] The invention belongs to the technical field of electronic materials, in particular to a method for preparing thick-film dielectric glass powder. Background technique [0002] Glass-ceramic is also called glass-ceramic. It has the advantages of both glass and ceramics. It is widely used in the fields of electronics, chemical industry, biology, medicine, military and construction. CAS series glass-ceramic refers to CaO-Al 2 o 3 -SiO 2 It is a glass-ceramic, that is to say, the material composition is mainly CAO, Al 2 o 3 , SiO 2 The glass-ceramic has high cost performance, so it is widely used in stainless steel base thick film heating, electroluminescent display, plasma display and hard disk substrate insulation coating and other fields, especially for stainless steel base high-power thick film heating Dielectric slurry not only has high requirements on the thermal expansion coefficient, mechanical properties and chemical stability of glass-cerami...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C12/00
Inventor 李金相
Owner 青田县南方玻纤原料有限公司
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