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Preparation method of superhigh-temperature ceramic boride sosoloid powder

An ultra-high temperature ceramic and boride technology is applied in the field of preparation of boride solid solution powder, and achieves the effects of low cost, wide source of raw materials and simple powder preparation process.

Pending Publication Date: 2018-03-02
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Despite the great application potential of ultra-high temperature ceramic boride solid solutions, there are few reports on their powder synthesis

Method used

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  • Preparation method of superhigh-temperature ceramic boride sosoloid powder
  • Preparation method of superhigh-temperature ceramic boride sosoloid powder
  • Preparation method of superhigh-temperature ceramic boride sosoloid powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Step 1: Put Ta 2 o 5 Powder, B 2 o 3 Weigh the powder and C powder according to the molar ratio of 1:2:11 to synthesize TaB 2 Required mixed powder a;

[0049] Step 2: Add ZrO 2 Powder, B 2 o 3 The powder and C powder are weighed to synthesize ZrB according to the molar ratio of 1:1:5 2 Required mixed powder b;

[0050] Step 3: Add HfO 2 Powder, B 2 o 3 Weigh the powder and C powder according to the molar ratio of 1:1:5 to synthesize HfB 2 Required mixed powder c;

[0051]Step 4: Put the weighed mixed powders a, b, and c into ball milling jars, and then place the ball milling jars on the ball mill for dry or wet ball milling. The ratio of balls to materials is 3:1, and the speed of the ball mill barrel 300 rev / min, ball milling time is 6h, after ball milling, sieve and dry to get evenly mixed mixed powder A, B, C.

[0052] Step 5: Select two mixed powders A and B from the mixed powders A, B, and C after uniform mixing, and weigh the corresponding powders f...

Embodiment 2

[0057] Step 1: Put Ta 2 o 5 Powder, B 2 o 3 The powder and C powder are weighed to synthesize TaB according to the molar ratio of 1:2.5:11 2 Required mixed powder a;

[0058] Step 2: Add ZrO 2 Powder, B 2 o 3 The powder and C powder are weighed to synthesize ZrB according to the molar ratio of 1:1.3:5 2 Required mixed powder b;

[0059] Step 3: Add HfO 2 Powder, B 2 o 3 The powder and C powder are weighed to synthesize HfB according to the molar ratio of 1:1.3:5 2 Required mixed powder c;

[0060] Step 4: Put the weighed mixed powders a, b, and c into ball milling jars respectively, and then place the ball milling jars on the ball mill for dry or wet ball milling. 500 rev / min, ball milling time is 4h, after ball milling, sieve and dry to obtain evenly mixed mixed powder A, B, C.

[0061] Step 5: Select two mixed powders A and C from the mixed powders A, B, and C after uniform mixing, and weigh the corresponding powders from mixed powders A and C according to the ...

Embodiment 3

[0066] Step 1: Put Ta 2 o 5 Powder, B 2 o 3 The powder and C powder are weighed to synthesize TaB according to the molar ratio of 1:3:11 2 Required mixed powder a;

[0067] Step 2: Add ZrO 2 Powder, B 2 o 3 The powder and C powder are weighed to synthesize ZrB according to the molar ratio of 1:1.5:5 2 Required mixed powder b;

[0068] Step 3: Add HfO 2 Powder, B 2 o 3 The powder and C powder are weighed to synthesize HfB according to the molar ratio of 1:1.5:5 2 Required mixed powder c;

[0069] Step 4: Put the weighed mixed powders a, b, and c into the ball milling tank respectively, and then place the ball milling tank on the ball mill for dry or wet ball milling. The ball-to-material ratio is 7:1, and the ball milling cylinder speed 700 rev / min, ball milling time is 2h, after ball milling, sieve and dry to get uniformly mixed mixed powder A, B, C.

[0070] Step 5: Select two mixed powders B and C from the uniformly mixed mixed powders A, B, and C, and weigh th...

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Abstract

The invention relates to a preparation method of superhigh-temperature ceramic boride sosoloid powder, which belongs to the preparation method of the boride sosoloid powder. The method comprises the following steps: respectively weighing the powder required for synthesis of single-phase boride ZrB2, TaB2, and HfB2, weighing corresponding powder from powder required for synthesis of single-phase boride ZrB2, TaB2, and HfB2 according to a mol ratio of Zr: Ta, Hf: Ta or Zr: Hf to prepare a mixed powder material, performing a carbon thermal reduction reaction through superhigh-temperature heat treatment to synthesize superhigh-temperature ceramic boride sosoloid ZrxTa1-xB2, HfxTa1-xB2 or HfxZr1-xB2 powder. Through regulation and control of the content of the components in mixed powder, solid solubility of the boride sosoloid and a microstructure are effectively controlled, so that potential oxidation protection capability and protection mechanism of the superhigh-temperature ceramic boridesosoloid are fully used, an application of the superhigh-temperature ceramic boride sosoloid powder under extreme environment is developed, and a firm base is established. The method has the advantages of wide raw material source, low cost, and simple preparation technology, and is suitable for industrial production.

Description

technical field [0001] The invention relates to a preparation method of boride solid solution powder, in particular to a preparation method of ultra-high temperature ceramic boride solid solution powder. Background technique [0002] Ultra-high temperature ceramic boride ZrB 2 、TaB 2 , HfB 2 Etc. is a class of structural ceramic materials that can be applied in extreme environments. It has many excellent properties such as high melting point (3245°C), high thermal conductivity, high electrical conductivity, good chemical stability and oxidation protection, and high specific life. , has attracted great attention from researchers, and it has become a candidate material for extreme environments such as rocket engines, atmospheric reentry, and supersonic flight. Due to ultra-high temperature ceramic boride ZrB 2 、TaB 2 , HfB 2 etc. have similar crystal structures, all of which are hexagonal, and the atomic radii of Hf atoms, Zr atoms and Ta atoms are very close, respective...

Claims

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Application Information

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IPC IPC(8): C04B35/58C04B35/626
CPCC04B35/58064C04B35/58078C04B35/626C04B35/62615C04B35/62645C04B2235/3251C04B2235/422
Inventor 任宣儒李贺军冯培忠郭立童张平鞠治成
Owner CHINA UNIV OF MINING & TECH
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