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Preparation method for batch synthesis of tantalum-hafnium-carbon ceramic powder

A technology of carbon ceramics and powder, which is applied in the field of inorganic material preparation, can solve the problems of the influence of powder purity and the inability to control the uniformity of powder particle size, etc., so as to suppress excessive growth, ensure powder purity, and ensure uniformity Effect

Active Publication Date: 2018-12-07
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention will solve existing preparation Ta 4 HfC 5 The ceramic powder method cannot control the uniformity of the particle size of the powder, and the technical problem that the purity of the powder is easily affected, and provides a preparation method for batch synthesis of tantalum-hafnium carbon ceramic powder

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  • Preparation method for batch synthesis of tantalum-hafnium-carbon ceramic powder
  • Preparation method for batch synthesis of tantalum-hafnium-carbon ceramic powder

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specific Embodiment approach 1

[0019] Specific embodiment 1: In this embodiment, a method for preparing a batch-synthesized tantalum-hafnium carbon ceramic powder is carried out according to the following steps:

[0020] 1. HfCl 4 The powder is added to acetylacetone, heated and stirred to obtain a precursor solution A;

[0021] Two, the TaCl 5 Mix the powder and n-butanol evenly, add to the precursor solution A obtained in step 1, heat and stir to obtain the precursor solution B;

[0022] 3. Add the phenolic resin to the precursor solution B obtained in step 2, heat and stir to obtain the precursor solution C;

[0023] 4. Move the precursor solution C obtained in step 3 into the reaction kettle, and carry out solvothermal treatment;

[0024] 5. Put the product obtained in step 4 into an oven for drying; then calcinate to obtain Ta 4 HfC 5 Ceramic powder.

specific Embodiment approach 2

[0025] Specific embodiment two: the difference between this embodiment and specific embodiment one is: in step one, HfCl 4 The mass ratio of powder to acetylacetone is 1: (4.9-9.8). Others are the same as in the first embodiment.

specific Embodiment approach 3

[0026] Embodiment 3: This embodiment is different from Embodiment 1 or 2 in that: in step 1, the heating temperature is 60-80° C., and the stirring time is 20-40 minutes. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a preparation method for batch synthesis of tantalum-hafnium-carbon ceramic powder, and relates to the field of preparation of inorganic materials, aiming at solving the technical problems of the existing method for preparing Ta4HfC5 ceramic powder that the uniformity of the particle size of powder cannot be controlled, and the purity of the powder is easy to be affected. The method comprises the following steps: 1, adding HfCl4 powder into acetylacetone, and heating and stirring; 2, adding TaCl5 powder and n-butyl alcohol mixed liquid, heating and stirring; 3, adding phenolic resin, heating and stirring; 4, moving the mixture into a reaction kettle for solvent heat treatment; 5, drying and calcining. The powder prepared according to the invention is Ta4HfC5 single-phase solid solution, the powder purity is more than or equal to 98.5%, and the powder particle size is less than or equal to 1 micrometer. The preparation method is used for batch synthesis of the Ta4HfC5 ceramic powder.

Description

technical field [0001] The invention relates to the field of preparation of inorganic materials. Background technique [0002] Ultra High Temperature Ceramic (UHTC for short), mainly including refractory nitrides, borides and carbides of transition metals, such as ZrB 2 , HfB 2 , TaN, HfN, HfC, ZrC, etc., their melting points are greater than 3000 °C. This type of material has the ability to withstand comprehensive environmental tests consisting of high temperature, reactive atmosphere (such as atomic oxygen, plasma, etc.), mechanical load and wear. With the deepening of research, it is found that IVB and VB group transition metal carbides in the periodic table of elements (such as HfC, ZrC, etc.) have very high melting points (basically above 3000 ° C), and at the same time, because their carbides have NaCl type structure, can form infinite solid solution [M1 x M2 1-x ]C y , where M1 and M2 are transition metals. Therefore, HfC and TaC can form a continuous single-ph...

Claims

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Application Information

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IPC IPC(8): C04B35/56C04B35/626
CPCC04B35/5622C04B35/62605C04B2235/444C04B2235/785C04B2235/96
Inventor 韩文波潘锐群张幸红檀铭一候臣霖王艳会
Owner HARBIN INST OF TECH