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Method for producing micro-nanoscale carbide ceramics by carbon coating

A carbide, micro-nano technology, applied in the fields of carbon compounds, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of low production efficiency and high reaction temperature, and achieve large correlation, high reaction efficiency, and uniform and controllable scale. Effect

Inactive Publication Date: 2013-12-18
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of high reaction temperature and low production efficiency in the production method of existing carbide ceramics, and provide a method for producing micronano-scale carbide ceramics by carbon coating

Method used

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  • Method for producing micro-nanoscale carbide ceramics by carbon coating
  • Method for producing micro-nanoscale carbide ceramics by carbon coating

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specific Embodiment approach 1

[0020] Specific implementation mode 1: The method for producing micro-nano-scale carbide ceramics by carbon coating in this embodiment is implemented according to the following steps:

[0021] 1. Mix the oxide raw material and the resin evenly, put it into an alcohol solvent for ball milling for 2-3 hours, then put it into a rotary evaporator and dry it at 65-75°C, press and solidify to obtain the mixture;

[0022] 2. Put the mixture obtained in step 1 in a carbonization furnace, heat it to 600-700°C at a heating rate of 10-50°C per hour, and keep it warm for 1-2 hours to obtain carbon-coated oxide powder;

[0023] 3. Transfer the carbon-coated oxide powder to an operating furnace, heat it to 1100-2000°C under the protection of an inert gas, and keep it warm for 4-8 hours for solid-phase carbonization reaction to obtain carbide powder;

[0024] Four, carry out oxidation treatment to the carbide powder that step 3 obtains and remove unreacted carbon raw material, obtain the car...

specific Embodiment approach 2

[0029] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the ratio of the metal oxide to the resin in the oxide raw material described in step 1 is 1 according to the molar ratio of the metal in the metal oxide to the carbon in the resin: (2.5~4.5) Mix well. Other steps and parameters are the same as those in Embodiment 1.

[0030] In this embodiment, the metal oxide is titanium oxide, tungsten oxide, aluminum oxide or tantalum oxide. When the oxide raw material is a non-metal oxide such as boron oxide, the molar ratio of the non-oxygen element in the oxide raw material to the carbon in the resin is 1: (2.5-4.5) Mix well.

specific Embodiment approach 3

[0031] Embodiment 3: This embodiment is different from Embodiment 1 or Embodiment 2 in Step 1. The particle size of the oxide raw material is 20-30 nm. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses a method for producing micro-nanoscale carbide ceramics by carbon coating, relates to a method for generating the carbide ceramics by carbon thermal reduction reaction and aims at solving the problems of high reaction temperature and low production efficiency of the existing production method of the carbide ceramics. The production method of the carbide ceramics comprises the following steps: (1) fully mixing oxide raw materials with resin, performing ball milling in an alcohol type solvent, drying, and then pressing and curing to form a mixture; (2) placing the mixture into a carbonization furnace, performing heating reaction, and carbonizing and decomposing the resin to get carbon-coated oxide powder; (3) performing solid phase carbonization reaction under the protection of inert gas; (4) performing oxidation treatment on carbide powder obtained in the step (3); (5) performing acid washing treatment on the carbide powder obtained in the step (4), and then drying to get the micro-nanoscale carbide ceramics. The method for producing the micro-nanoscale carbide ceramics, disclosed by the invention, has the advantages of high reaction efficiency and lower reaction temperature, and the scale of the obtained carbide powder is uniform and controllable.

Description

technical field [0001] The invention relates to a method for generating carbide ceramics by carbothermal reduction reaction. Background technique [0002] Carbide ceramic series, such as titanium carbide, tungsten carbide, boron carbide and other materials have the characteristics of stable structure, high melting point, high hardness, good chemical stability, etc., and are mainly used to manufacture cermet composite materials, heat-resistant alloys and hard alloys. The usual carbide ceramics have the characteristics of good wear resistance, good thermal conductivity, high thermal shock resistance, good chemical stability, no hydrolysis, good high temperature oxidation resistance and no reaction with acid at room temperature, and are widely used as cutting materials. Tools, polishing pastes, abrasives, anti-fatigue materials and reinforcements for composite materials. For example, 6%-30% TiC is added to WC-Co cemented carbide to form a TiC-WC solid solution with WC, which c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/30C04B35/56C01B32/90
Inventor 赵丽丽
Owner HARBIN INST OF TECH
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