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Low-temperature firing high alumina ceramic and preparation method thereof

A high-alumina ceramics, low-temperature firing technology, applied in the field of alumina ceramics, can solve the problems of expensive and complex equipment, high raw material cost, restrictions, etc., and achieve the effect of simple process, outstanding effect, and reduction of electricity consumption.

Inactive Publication Date: 2018-11-27
河津市锦浩特种陶瓷有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to reduce the sintering temperature of high alumina magnets, alumina raw materials with smaller particle sizes can be used, and sintering methods such as hot pressing sintering, hot isostatic pressing sintering, vacuum sintering, atmosphere sintering, microwave sintering, and equal particle sintering can also be used. , but these methods either have extremely high cost of raw materials, or expensive and complicated equipment, or are difficult to produce in large quantities, which limit the application of these methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Low-temperature fired high-alumina ceramics, including raw materials in the following proportions by weight:

[0043] Bismuth trioxide 0.2 part,

[0044] 0.2 parts of antimony trioxide,

[0045] 0.4 parts of titanium dioxide,

[0046] Magnesium oxide 0.1 part,

[0047] 0.5 parts of silicon dioxide,

[0048] Kaolin 0.5 part,

[0049] Calcium oxide 2 parts,

[0050] Aluminum oxide 100 parts.

[0051] The bismuth trioxide, antimony trioxide and titanium dioxide all use high-purity and high-fineness raw materials with a fineness of D50≤4 microns.

[0052] The magnesium oxide, silicon dioxide, kaolin, calcium oxide and aluminum oxide all use high-purity and high-fineness raw materials with a fineness of D50≤4 microns.

[0053] A preparation method for low-temperature firing high-alumina ceramics, comprising the steps of:

[0054] In the first step, pour the raw materials into the container according to the above ratio, add water and mix them into a slurry. The total ...

Embodiment 2

[0061] Low-temperature fired high-alumina ceramics, including raw materials in the following proportions by weight:

[0062] Bismuth trioxide 0.3 part,

[0063] 0.3 parts of antimony trioxide,

[0064] 0.4 parts of titanium dioxide,

[0065] 0.2 parts of magnesium oxide,

[0066] 0.5 parts of silicon dioxide,

[0067] 1 part kaolin clay,

[0068] Calcium oxide 2 parts,

[0069] Aluminum oxide 100 parts.

[0070] The bismuth trioxide, antimony trioxide and titanium dioxide all use high-purity and high-fineness raw materials with a fineness of D50≤4 microns.

[0071] The magnesium oxide, silicon dioxide, kaolin, calcium oxide and aluminum oxide all use high-purity and high-fineness raw materials with a fineness of D50≤4 microns.

[0072] A preparation method for low-temperature firing high-alumina ceramics, comprising the steps of:

[0073] In the first step, the raw materials are poured into the container according to the ratio and mixed with water to form a slurry. The t...

Embodiment 3

[0080] Low-temperature fired high-alumina ceramics, including raw materials in the following proportions by weight:

[0081] Bismuth trioxide 0.4 part,

[0082] 0.4 parts of antimony trioxide,

[0083] 0.6 parts of titanium dioxide,

[0084] 0.3 parts of magnesium oxide,

[0085] 0.8 parts of silicon dioxide,

[0086] Kaolin 1.5 parts,

[0087] Calcium oxide 3 parts,

[0088] Aluminum oxide 100 parts.

[0089] The bismuth trioxide, antimony trioxide and titanium dioxide all use high-purity and high-fineness raw materials with a fineness of D50≤4 microns.

[0090] The magnesium oxide, silicon dioxide, kaolin, calcium oxide and aluminum oxide all use high-purity and high-fineness raw materials with a fineness of D50≤4 microns.

[0091] A preparation method for low-temperature firing high-alumina ceramics, comprising the steps of:

[0092] In the first step, the raw materials are poured into the container according to the ratio and mixed with water to form a slurry. The t...

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Abstract

The invention discloses a low-temperature firing high alumina ceramic and a preparation method thereof and belongs to the technical field of alumina ceramics. According to the solved technical problem, the invention provides the low-temperature firing high alumina ceramic and the preparation method thereof, low-temperature firing can be realized while the mechanical, electrical and biological properties of the high alumina ceramics are ensured, and the process difficulty and energy losses are reduced. With the adoption of the technical scheme, the low-temperature firing high alumina ceramic comprises the following raw materials in parts by weight: 0.2-1 part of bismuth trioxide, 0.2-1 part of antimonous oxide, 0.4-1 part of titanium dioxide, 0.1-0.5 part of magnesium oxide, 0.5-1.5 parts of silicon dioxide, 0.5-2 parts of kaolin, 2-8 parts of calcium oxide and 100 parts of alumina. The process in the invention is simple, the effects are excellent on the basis of not changing the conventional equipment, the firing temperature is lower than the conventional sintering temperature by 120 DEG C or more while the mechanical, electrical and biological properties of the high alumina ceramics are ensured, and the service life of the kiln, bowls and molybdenum rods is prolonged.

Description

technical field [0001] The invention relates to low-temperature firing high-alumina ceramics and a preparation method thereof, belonging to the technical field of alumina ceramics, and in particular to the preparation of low-temperature firing alumina ceramics. Background technique [0002] Alumina ceramics are a type of alpha AL 2 o 3 The main crystal phase of the ceramic material generally has an alumina content between 75% and 99%. It is customary to classify according to the alumina content in the ingredients. The alumina content of about 75% is called "75" magnetism, and the alumina content of about 99% is called "99" magnetism. Alumina is widely used in the fields of electronics, machinery, textiles, automobiles, chemicals, and metallurgy due to its wide source of raw materials and relatively low price. [0003] High-alumina ceramics refer to alumina ceramics with an alumina content of 90-99%. The sintering temperature is generally above 1600 °C, and the sintering t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/117C04B35/622
CPCC04B35/117C04B35/622C04B2235/3232C04B2235/3294C04B2235/3298C04B2235/3418C04B2235/349C04B2235/3208C04B2235/3206C04B2235/5436C04B2235/656
Inventor 任国兴马冬冬
Owner 河津市锦浩特种陶瓷有限公司
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