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Glass-ceramic powder precursor, glass-ceramic powder, preparation method and application thereof

A technology of glass-ceramic powder and glass-ceramic, applied in the field of glass-ceramic powder and its preparation, can solve problems such as uneven performance of insulating paste, achieve high insulation performance and thermal shock resistance, easy industrialization, The effect of rich source of raw materials

Active Publication Date: 2016-03-23
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the glass-ceramic materials prepared by the above-mentioned technologies contain more metal compound impurities, which lead to uneven performance in the field of insulating paste, which has not attracted people's attention in the field of insulating paste. For the preparation of decorative microcrystalline plates

Method used

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  • Glass-ceramic powder precursor, glass-ceramic powder, preparation method and application thereof
  • Glass-ceramic powder precursor, glass-ceramic powder, preparation method and application thereof
  • Glass-ceramic powder precursor, glass-ceramic powder, preparation method and application thereof

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preparation example Construction

[0032] In a more preferred embodiment, the preparation method of the glass-ceramic powder may include:

[0033] The aforementioned glass-ceramic powder precursor is provided, and each component in the glass-ceramic powder precursor is uniformly mixed;

[0034] Melting the glass-ceramic powder precursor at 1200-1450°C, especially preferably at 1200-1300°C, to form glass liquid, wherein the melting time is preferably more than 15 minutes, especially preferably controlled at 15-120 minutes;

[0035] Putting the glass liquid into water, especially deionized water, for water quenching to form glass-ceramic slag;

[0036] And, the glass-ceramic slag is ground and / or ball-milled and other processes, preferably sequentially ground and high-speed ball-milled to form glass-ceramic powder, preferably glass-ceramic powder with a particle size of 0.1-10 μm, In order to mix with organic solvents.

[0037] In order to uniformly mix the components in the glass-ceramic powder precursor, vari...

Embodiment 1

[0052] Weigh the following materials: 80 parts (if not specified below, then all parts by weight) attapulgite clay, 45 parts of limestone powder, 4 parts of boric acid, 1 part of cobalt oxide and 2 parts of cerium oxide as raw materials, with deionized water as The dispersion medium was ball milled for 10 hours, wherein the mass ratio of raw materials to deionized water was 1:1, dried at 120°C for 6 hours, smelted at 1300°C for 60 minutes, and then water-quenched to obtain glass slag, which was ball-milled into a microparticle with an average particle size of about 2 μm. Crystal glass powder is rolled into after adding organic solvent (for example, any one or more mixtures in terpineol, butyl carbitol acetate, 1,4-butyrolactone, polyethylene glycol) Thick-film dielectric paste, and then screen-printed the paste on the surface of 304 stainless steel substrate, after debinding at 400°C, heat treatment at 850°C for 12 minutes to obtain product a.

Embodiment 2

[0054] Weigh the following materials: 100 parts (if not specified below, then all parts by weight) attapulgite clay, 30 parts of limestone powder, 5 parts of boric acid, 0.5 part of cobalt oxide and 1 part of cerium oxide as raw materials, with deionized water as The dispersion medium is ball milled for 2 hours, and the mixture is uniform. The mass ratio of raw materials to deionized water is 1:1. After drying, it is dried at 150°C for 4 hours, melted at 1450°C for 15 minutes, and then water-quenched to obtain glass slag, which is ball-milled to an average Glass-ceramic powder with a particle size of about 10 μm (hereinafter referred to as "glass powder") is added with an organic solvent (the same or similar organic solvent as in Example 1) and then rolled into a thick film dielectric slurry, and then the slurry is used Screen printing coated on the surface of 430 stainless steel substrate, after debinding at 350°C, heat treatment at 870°C for 15min to obtain product b.

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Abstract

The invention discloses a microcrystal glass powder precursor, microcrystal glass powder as well as a preparation method and an application of the microcrystal glass powder precursor and the microcrystal glass powder. The microcrystal glass powder precursor comprises basic components such as attapulgite clays and limestone flour and selectable components such as borax, TiO2, ZrO2, Co2O3 and CeO2 and the like. The preparation method of the microcrystal glass powder comprises the following steps: sequentially melting at high temperature, water-quenching and grinding the microcrystal glass powder precursor to prepare the microcrystal glass powder. By adopting the attapulgite clays as a main raw material to prepare the microcrystal glass powder, the microcrystal glass powder is not only abundant in source of raw materials and low in price, but also has the effect of seed crystals as the main source of Al2O3, SiO2 and MgO in CAS (CaO-Al2O3-SiO2)-serial microcrystal glass so as to promote glass devitrification. Furthermore, the preparation method has the characteristics of simple process, low high-temperature melting temperature, short time, low energy consumption, low cost and the like and is easy to industrialize. Meanwhile, the obtained microcrystal glass powder is high in insulating performance and thermal shock resistance and can fully satisfy the requirements of current thick film medium slurry products.

Description

technical field [0001] The invention relates to a thick-film dielectric glass-ceramic powder and a preparation process thereof, in particular to a glass-ceramic powder formed by using attapulgite clay as a main raw material, a preparation method and application thereof. Background technique [0002] With the development of thick film technology, the thick film dielectric glass powder which plays an important role has attracted more and more attention from researchers, especially the CaO-Al in aluminosilicate glass ceramic powder with high cost performance. 2 o 3 -SiO 2 (CAS) system, can be widely used in stainless steel base thick film heating, electroluminescent display, plasma display and hard disk substrate insulation coating and other fields. In particular, stainless steel-based high-power thick-film heating medium slurry not only has high requirements for thermal expansion coefficient, mechanical properties and chemical stability of glass-ceramic powder, but also has ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C12/00
Inventor 刘丰华张海青李志祥王彪马晓磊许高杰
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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