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Process for synthesizing tin titanium carbide ceramic powder under atmospheric pressure

A ceramic powder and normal pressure synthesis technology, which is applied in the field of preparation of high-purity tin carbide titanium Ti2SnC in batches under normal pressure, can solve the problems of high purity and cost of SnC, long preparation time, expensive sintering equipment, etc., and shorten the synthesis time , Simple equipment and low cost

Inactive Publication Date: 2006-01-25
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to change the traditional method of synthesizing Ti with Ti, Sn and C as initial ingredients. 2 For the problem of impurity phases in SnC, directly use Ti, Sn and TiC as raw materials; use atmospheric pressure sintering technology instead of expensive hot pressing or hot isostatic pressing technology, and synthesize high-purity Ti at 1050-1250 °C 2 SnC solves the problems of expensive sintering equipment, long preparation time and Ti 2 The high purity and cost of SnC, etc., to achieve large-scale production of high-purity Ti 2 SnC powder

Method used

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  • Process for synthesizing tin titanium carbide ceramic powder under atmospheric pressure
  • Process for synthesizing tin titanium carbide ceramic powder under atmospheric pressure

Examples

Experimental program
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Effect test

Embodiment approach 1

[0020] According to the molar ratio of Ti:Sn:TiC=1:0.8:0.9, weigh 24.4 grams of Ti powder, 48.4 grams of Sn powder, and 27.2 grams of TiC powder, put them into a plastic bottle, use agate balls as the grinding medium, and grind them on a ball mill Dry mix for 5 hours. Then in the mould, it is pressed into a block under a pressure of 50MPa, put into a high-temperature furnace, and in a vacuum atmosphere, the temperature of the furnace is raised to 1150°C at a heating rate of 20°C / min, and the holding time is 30 minutes, that is, the high-purity Ti 2 SnC powder.

Embodiment approach 2

[0022] According to the molar ratio of Ti:Sn:TiC=1:0.7:0.8, weigh 26.8 grams of Ti powder, 46.5 grams of Sn powder, and 26.7 grams of TiC powder, and dry-mix them on a ball mill for 5 hours with agate balls as grinding media. Then in the mould, the pressure of 20MPa is pressed into a block, put into a high-temperature furnace, vacuum atmosphere, the temperature of the furnace is raised to 1150°C at a heating rate of 10°C / min, and the holding time is 15 minutes, that is, the high-purity Ti 2 SnC powder.

Embodiment approach 3

[0024] According to the molar ratio of Ti:Sn:TiC=1:0.8:0.9, weigh 24.4 grams of Ti powder, 48.4 grams of Sn powder, and 27.2 grams of TiC powder, and dry mix them on a ball mill for 5 hours with agate balls as grinding media. Then in the mould, press the pressure of 20MPa into a block, put it into a high-temperature furnace, vacuum atmosphere, raise the temperature of the furnace to 1200°C at a heating rate of 15°C / min, and hold the temperature for 15 minutes to obtain high-purity Ti 2 SnC powder.

[0025] Prepared Ti 2 The XRD pattern of SnC powder is attached figure 1 . It can be seen from the figure that the product has high purity, and there is no impurity phase such as TiC in the XRD spectrum. Ti 2 SnC powder morphology see attached figure 2 . It can be seen from the figure that the particles are flaky crystals with a particle size of less than 4 μm.

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Abstract

An ordinary-pressure synthesizing process of Ti2SnC ceramic powder includes such steps as providing powdered Ti, Sn and TiC in the mole ration of 1:(0.6-1):(0.7-1),ball grounding, pressing under 10-100 MPa to become blocks, and calcining at 1050-1250 deg. C for 5-60 min in vacuum or argon gas.

Description

technical field [0001] The invention relates to a preparation method of ceramic powder, in particular to a batch synthesis of high-purity tin carbide titanium Ti at atmospheric pressure 2 The preparation method of SnC. Background technique [0002] Ti 2 SnC materials combine the advantages of ceramics and metal materials, such as ceramics, high strength, high modulus, chemical corrosion resistance; like metals, high electrical conductivity, low hardness; especially graphite Easy processing and self-lubrication. Ti 2 SnC has a wide range of new application prospects, such as being used as current-receiving friction parts, replacing graphite as a new generation of brush materials, various wear-reducing components, and corrosion-resistant parts. In addition, Ti 2 SnC powder can also be used as a second phase enhancer, which can not only improve the strength and modulus of the composite material, but also improve its electrical conductivity accordingly. Therefore, the synt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/56C04B35/622
Inventor 李世波翟洪祥贝国平周洋张志力
Owner BEIJING JIAOTONG UNIV
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