Synthesis method of (TiZrHfNbTa) CN high-entropy ultrahigh-temperature carbonitride ceramic powder

A carbonitride and ceramic powder technology, which is applied in the synthesis field of CN high-entropy and ultra-high temperature carbonitride ceramic powders, can solve the problems of easy introduction of oxides, high cost, impurities, etc., and achieves uniform composition distribution, low cost, and oxygen low content effect

Pending Publication Date: 2022-04-12
HARBIN INST OF TECH
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the technical problems of high cost and easy introduction of oxide impurities in the preparation of high-entropy ultra-high temperature carbonitride ceramics, and provides a synthesis method of (TiZrHfNbTa)CN high-entropy ultra-high temperature carbonitride ceramic powder

Method used

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  • Synthesis method of (TiZrHfNbTa) CN high-entropy ultrahigh-temperature carbonitride ceramic powder
  • Synthesis method of (TiZrHfNbTa) CN high-entropy ultrahigh-temperature carbonitride ceramic powder
  • Synthesis method of (TiZrHfNbTa) CN high-entropy ultrahigh-temperature carbonitride ceramic powder

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specific Embodiment approach 1

[0018] Specific embodiment one: a kind of synthetic method of (TiZrHfNbTa) CN high-entropy ultra-high temperature carbonitride ceramic powder in this embodiment is carried out according to the following steps:

[0019] 1. Prepare glucose mixed solution: mix glucose, water, acrylamide and N-N' methylenebisacrylamide, heat and stir to obtain glucose mixed solution;

[0020] 2. Preparation of oxide mixed powder: mix TiO 2 Powder, ZrO 2 Powder, HfO 2 Powder, Nb 2 o 5 Powder and Ta 2 o 5 The powder is mixed by ball milling to obtain an oxide mixed powder;

[0021] 3. Preparation of mixed slurry: adding the oxide mixed powder obtained in step 2 to the glucose mixed solution obtained in step 1, and dispersing by ball milling to obtain mixed slurry;

[0022] 4. Prepare gel: add triethanolamine and ammonium persulfate to the mixed slurry obtained in step 3, heat and stir to obtain gel, and then dry the gel;

[0023] 5. Gel heat treatment: place the dried gel obtained in step 4 ...

specific Embodiment approach 2

[0024] Embodiment 2: This embodiment differs from Embodiment 1 in that the mass ratio of glucose, water, acrylamide and N-N' methylenebisacrylamide in Step 1 is 100:100:40:1. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0025] Embodiment 3: This embodiment is different from Embodiments 1 and 2 in that: step 1 controls the heating and stirring temperature to 50-70° C. and the stirring time to 15-30 minutes. Others are the same as the first and second embodiments.

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Abstract

The invention discloses a synthesis method of (TiZrHfNbTa) CN high-entropy ultrahigh-temperature carbonitride ceramic powder, belongs to the technical field of high-entropy ultrahigh-temperature ceramics, and particularly relates to the synthesis method of the (TiZrHfNbTa) CN high-entropy ultrahigh-temperature carbonitride ceramic powder. The invention aims to solve the problems of high cost and higher oxygen impurity content in the existing preparation of (TiZrHfNbTa) CN high-entropy ultrahigh-temperature carbonitride ceramic powder. The synthesis method comprises the following steps: 1, preparing a glucose mixed solution; 2, preparing oxide mixed powder; 3, preparing mixed slurry; 4, preparing gel; and 5, carrying out gel heat treatment. The synthesized powder has the advantages of being low in cost, low in oxygen impurity content, uniform in component distribution, suitable for batch production and the like. The method disclosed by the invention is suitable for synthesizing the (TiZrHfNbTa) CN high-entropy ultrahigh-temperature carbonitride ceramic powder.

Description

technical field [0001] The invention belongs to the technical field of high-entropy ultra-high temperature ceramics, and specifically relates to a synthesis method of (TiZrHfNbTa)CN high-entropy ultra-high temperature carbonitride ceramic powder. Background technique [0002] High-entropy ultra-high-temperature ceramics are a new type of ultra-high-temperature ceramic material, which is defined as a single-phase compound composed of cations or anions of no less than four elements in an equimolar or nearly equimolar ratio. Compared with single-component ultra-high temperature ceramics, high-entropy ultra-high temperature ceramics have the characteristics of larger composition design space, better high-temperature stability and lower thermal expansion coefficient, and have become a research hotspot at home and abroad in recent years. At present, research at home and abroad mainly focuses on high-entropy ultra-high temperature ceramics with single anions such as borides, carbid...

Claims

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Application Information

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IPC IPC(8): C04B35/58C04B35/626C04B35/624
Inventor 董顺夏莲森张幸红韩杰才杜善义
Owner HARBIN INST OF TECH
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