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92% low temperature al2o3 porcelain powder

A porcelain powder and low-temperature technology, applied in the field of 92% low-temperature Al2O3 porcelain powder

Active Publication Date: 2011-12-28
河南济源兄弟材料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Establishing a scientific outlook on development, saving energy, reducing emissions, reducing energy consumption, and building a conservation-oriented society are new requirements put forward by the 17th National Congress of the Communist Party of China. They are all eliminating outdated equipment and processes, promoting technological progress, and accelerating the pace of energy conservation and emission reduction; the Al2O3 ceramic industry also has backward technology and The problem of high consumption and low economic benefits urgently needs to solve the ceramic production process, reduce the temperature of the porcelain, and obtain high-performance porcelain bodies. It is necessary to start from the raw materials and manufacture new synthetic ceramic materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Guaranteed α-Al 2 o 3 In the case of content, the SiO contained in the components should be controlled 2 / CaO is between 0.6 and 1.6, the content of MgO is not more than 1 / 3 of the content of flux oxides, and Mg, as a grain growth inhibitor, has a great effect on promoting sintering densification and is an essential element;

[0020] When Ca:Si=1:1.6, Al 2 o 3 Ceramics can be sintered at low temperatures, because the Ca-Al-Si ternary glass phase (liquid phase) is formed, and the diffusion resistance of ions in the liquid phase is small, thereby reducing the sintering temperature.

[0021] Among them, CeO 2 , MgTiO 3 Composite oxides as a special form of flux can reduce the firing temperature of ceramics. During the firing process, it and Al 2 o 3 The formed hexagonal crystal structure is closely packed and arranged so that Al 2 o 3 The crystal is stable and dense;

[0022] Ce and Zn oxides can be used as auxiliary materials to improve the performance of cerami...

Embodiment 2

[0027] The main difference between this embodiment and embodiment 1 is: a 92% low-temperature Al 2 o 3 Porcelain powder, by weight percentage, the porcelain powder consists of the following components: α-Al 2 o 3 91%, kaolin 4.53%, calcite 2.62%, calcined talc 0.56%, ZnO 0.38%, CeO 2 0.43%, MgTiO 3 0.48%.

Embodiment 3

[0029] 1. Raw material processing: in Al 2 o 3 In ceramic low-temperature sintering technology, by increasing Al 2 o 3 The fineness and activity of the raw material powder can reduce Al 2 o 3 The firing temperature of ceramics; therefore, Al with high purity, good activity and easy sintering should be selected. 2 o 3 Powder as raw material, ie Al 2 o 3 The finer the particles of the powder, the better, and the higher the activity, the better, so that the ceramic body is easier to sinter and the sintering temperature is lower;

[0030]Therefore, the mechanical ball milling method is used for grinding, and the ball mill is lined with alumina tiles to ensure that no other impurities are mixed in the ball milling process.

[0031] 2. Formula composition: Al 2 o 3 The sintering temperature of ceramics is mainly determined by Al 2 o 3 Determined by the content of Al 2 o 3 The higher the content, the Al 2 o 3 The higher the sintering temperature of ceramics;

[0032]...

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PUM

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Abstract

The invention provides a 92% low-temperature Al2O3 porcelain powder, which is composed of the following components by weight percentage: α-Al2O3 90%-93%, kaolin 3%-6.5%, calcite 2%-4.5%, calcined Talc 0.3%~0.7%, ZnO 0.3%~0.5%, CeO2 0.3%~0.6%, MgTiO3 0.3%~0.5%; described α-Al2O3 purity ≥ 99.7%, its average particle diameter 2~5 μ m; The 92% low-temperature Al2O3 ceramic powder can reduce the sintering temperature of the Al2O3 ceramics, can also increase the sintering density of the Al2O3 ceramics, and is beneficial to energy saving and emission reduction.

Description

technical field [0001] The present invention relates to an Al 2 o 3 The raw material for sintering ceramics, specifically, involves a 92% low-temperature Al 2 o 3 porcelain powder. Background technique [0002] Al 2 o 3 Ceramic is a new type of material with the most stable chemical properties and the highest mechanical strength among oxides. Its advantages are: excellent high-temperature mechanical properties, chemical corrosion resistance, high-temperature oxidation resistance, wear resistance, and small specific gravity (about 1 / 3); thus, Al 2 o 3 Ceramics gradually replace expensive ultra-high alloy steels in many occasions, or are applied to occasions where metal materials are simply not suitable, such as engine cylinder liners, bearing bushes, sealing rings, textile wear-resistant parts, ceramic cutting tools, etc.; in addition, Al 2 o 3 Ceramics have the advantages of excellent electrical insulation properties and low dielectric loss. Therefore, they also ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/10
Inventor 黄超张莎莎朱宁宁
Owner 河南济源兄弟材料有限责任公司