Polybasic solid solution rare earth silicate ceramic powder and preparation method thereof

A rare-earth silicate and ceramic powder technology, which is applied in the field of multi-component solid-solution rare-earth silicate ceramic powder and its preparation, can solve the problems of limited application fields, difficult and harsh preparation processes, etc.

Inactive Publication Date: 2019-07-23
淄博星澳新材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, alloy-based high-entropy ceramics are expensive, and the preparation process is very harsh. They are widely used in the military field. Their high cost and harsh preparation process make it difficult to carry out large-scale production in factories, and their application fields are very limited.

Method used

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  • Polybasic solid solution rare earth silicate ceramic powder and preparation method thereof
  • Polybasic solid solution rare earth silicate ceramic powder and preparation method thereof
  • Polybasic solid solution rare earth silicate ceramic powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Preparation of multi-element solid solution rare earth silicate ceramic powder (Y 0.2 Yb 0.2 Nd 0.2 SM 0.2 La 0.2 ) 2 Si 2 o 7 :

[0046] (1) According to the molar ratio of Y:Yb:Nd:Sm:La:Si=0.2:0.2:0.2:0.2:0.2:1.0, Y 2 o 3 , Yb 2 o 3 、Nd 2 o 3 、Sm 2 o 3 , La 2 o 3 and SiO 2 The raw material powder is weighed, mixed in a deionized water medium for 30 hours, the rotating speed of the ball mill is 150 r / min, and the uniformly mixed raw material is vacuum-dried at a temperature of 25 ° C for 48 hours to obtain a mixed raw material;

[0047] (2) Put the mixed raw materials in a high-temperature reaction furnace, and in a flowing air atmosphere, heat-preserve and react at a temperature of 1500° C. for 10 hours to obtain multi-component solid-solution rare earth silicate ceramic particles;

[0048] (3) Mill the multi-component solid-solution rare earth silicate ceramic particles in the water medium for 24 hours with an alumina ball, and the speed of the ball...

Embodiment 2

[0055] Preparation of multi-element solid solution rare earth silicate ceramic powder (Y 0.2 Yb 0.2 Ce 0.2 SM 0.2 La 0.2 ) 2 Si 2 o 7 :

[0056] (1) According to the molar ratio of Y:Yb:Ce:Sm:La:Si=0.2:0.2:0.2:0.2:0.2:1.5, Y 2 o 3 , Yb 2 o 3 , CeO 2 、Sm 2 o 3 , La 2 o 3 and SiO 2 The raw material powder is weighed, mixed in a deionized water medium for 24 hours, the speed of the ball mill is 300r / min, and the uniformly mixed raw material is dried at a temperature of 55°C in flowing air for 48 hours to obtain a mixed raw material;

[0057] (2) Put the mixed raw materials in a high-temperature reaction furnace, and in a flowing air atmosphere, heat-preserve and react at 1700° C. for 2 hours to obtain multi-component solid-solution rare earth silicate ceramic particles;

[0058] (3) Mill the multi-component solid-solution rare earth silicate ceramic particles in the water medium for 20 hours with zirconia balls, and the speed of the ball mill is 320r / min; Drying...

Embodiment 3

[0061] Preparation of multi-element solid solution rare earth silicate ceramic powder (Y 0.2 Yb 0.2 Er 0.2 Eu 0.2 La 0.2 ) 2 Si 2 o 7 :

[0062] (1) According to the molar ratio of Y:Yb:Er:Eu:La:Si=0.2:0.2:0.2:0.2:0:1.5, Y 2 o 3 , Yb 2 o 3 、Er 2 o 3 、Eu 2 o 3 , La 2 o 3 and SiO 2 The raw material powder is weighed, mixed in a deionized water medium for 36 hours, the speed of the ball mill is 100r / min, and the uniformly mixed raw material is dried at a temperature of 45°C in flowing air for 36 hours to obtain a mixed raw material;

[0063] (2) Put the mixed raw materials in a high-temperature reaction furnace, and in a flowing air atmosphere, heat-retain and react at 1650° C. for 5 hours to obtain multi-component solid-solution rare earth silicate ceramic particles;

[0064] (3) Mill the multi-component solid-solution rare earth silicate ceramic particles in water medium for 2 hours with zirconia balls, and the ball mill speed is 400r / min; Drying and granulat...

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Abstract

The invention relates to the technical field of ultrahigh temperature ceramic powder, in particular to polybasic solid solution rare earth silicate ceramic powder and a preparation method thereof. Thechemical formula of the polybasic solid solution rare earth silicate ceramic powder is (Y0.2Yb0.2Re'0.2Re'0.2La0.2)2Si2O7, wherein Re' and Re' are selected from any two of Nd, Ce, Sm, Er and Eu. Thepreparation method comprises the following steps: mixing raw materials by adopting a wet-mixing method, and drying; then placing the mixture in a high-temperature reaction furnace for reacting; performing wet milling and spray drying granulation to obtain the polybasic solid solution rare earth silicate ceramic powder. The polybasic solid solution rare earth silicate ceramic powder has high solidsolubility, excellent high temperature resistance, no decomposition at a high temperature and low thermal conductivity. The preparation method is simple and feasible.

Description

technical field [0001] The invention relates to the technical field of ultra-high temperature ceramic powder, in particular to a multi-component solid-solution rare earth silicate ceramic powder and a preparation method thereof. Background technique [0002] Ultra-high-temperature ceramics refer to a type of special ceramic material that can maintain stable physical and chemical properties in a high-temperature environment (1650-2200 ° C) and in a reaction atmosphere. Compared with ordinary carbide ceramics, not only the use temperature is higher, but also the High temperature chemical stability also has special requirements. It is mainly used in the engines of aerospace rockets, space vehicles, nose cones of hypersonic vehicles in the atmosphere, heat protection systems and propulsion systems of leading edge and hypersonic vehicles, as well as electrodes, crucibles and related materials for high-temperature melting and continuous casting of metals. components, heating elem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/16C04B35/50C04B35/626C04B35/622C04B35/66
CPCC04B35/16C04B35/50C04B35/62222C04B35/62605C04B35/66C04B2235/3224C04B2235/3225C04B2235/3227C04B2235/3229
Inventor 吴事江蒋丹宇刘家臣巩玉贤杨焕顺林杨张合军
Owner 淄博星澳新材料研究院有限公司
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