Method for synthesizing tin-titanium carbide at low temperature

A technology of tin carbide, titanium, and low temperature, which is applied in chemical instruments and methods, inorganic chemistry, tin compounds, etc., can solve the problems of long synthesis time, high sintering temperature, and influence on the large-scale production of powder, and achieve short ball milling time and synthetic powder The effect of low cost and shortened synthesis time

Inactive Publication Date: 2006-08-23
BEIJING JIAOTONG UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

Using the above technology, the sintering temperature is high and the synthesis time is long, which affects the large-scale production of powder

Method used

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  • Method for synthesizing tin-titanium carbide at low temperature

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0017] According to the ratio of ball to material of 20:1, graphite C powder is put into the ball mill jar, the ball mill jar is evacuated, and the vacuum degree is less than 1Pa; the speed of the planetary high-energy ball mill is 300r / min, and the grinding ball is agate ball; 4h of ball milling to obtain ultrafine C powder. Then press Ti:Sn:C=2:1:1 molar ratio batching, take by weighing 42.3 grams of Ti powder, 52.5 grams of Sn powder, 5.3 grams of superfine C powder, put into plastic bottle, take agate ball as grinding medium, Mix on the mixer for 5h. The mixed material is pressed into a block under a pressure of 50MPa. Put the briquette into a high-temperature furnace, in an argon atmosphere, raise the temperature of the furnace to 650°C at a heating rate of 40°C / min, and hold the temperature for 30 minutes to obtain Ti 2 SnC powder.

Embodiment approach 2

[0019] According to the ratio of ball to material of 50:1, graphite C powder is put into the ball mill jar, the ball mill jar is evacuated, and the vacuum degree is less than 1Pa; the speed of planetary high-energy ball mill is 250r / min, and the grinding ball is agate ball; After 6h of ball milling, ultrafine C powder was obtained. According to the molar ratio of Ti: Sn: C=2:0.95:0.95, weigh 43.6 grams of Ti powder, 51.3 grams of Sn powder, and 5.2 grams of superfine C powder, put them into plastic bottles, and use agate balls as grinding media. Mix in a ball mill for 8 hours. The mixed material is pressed into a block under a pressure of 80MPa. Put the briquette into a high-temperature furnace in a vacuum atmosphere, raise the temperature of the furnace to 550°C at a heating rate of 10°C / min, and hold the temperature for 5 minutes to obtain Ti 2 SnC powder.

Embodiment approach 3

[0021] According to the ratio of ball to material of 80:1, graphite C powder is put into the ball mill jar, and the ball mill jar is evacuated, and the vacuum degree is less than 1Pa; the speed of planetary high-energy ball mill is 180r / min, and the grinding ball is agate ball; 11h of ball milling to obtain ultrafine C powder. According to the molar ratio of Ti: Sn: C=2:0.8:0.8, weigh 48.1 grams of Ti powder, 47.7 grams of Sn powder, and 4.2 grams of superfine C powder, put them into plastic bottles, and use agate balls as grinding media. Mix in a ball mill for 10 hours. The mixed material is pressed into a block under a pressure of 100 MPa. Put the briquette into a high-temperature furnace, and in a vacuum atmosphere, raise the temperature of the furnace to 800°C at a heating rate of 20°C / min, and hold the temperature for 15 minutes to obtain Ti 2 SnC powder.

[0022] Ti synthesized by the present invention 2 SnC powder morphology see attached figure 1 . Ti 2 The surfa...

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Abstract

The synthesis process of Ti2SnC powder includes the following steps: ball milling C powder in a ball mill of vacuum degree lower than 1 Pa, rotation speed of 150-300 rpm and with agate balls and material/ball ratio of 10-100 for 4-15 hr to obtain sub-micron or nanometer level superfine C powder; compounding superfine C powder, Ti powder and Sn powder in the molar ratio of 0.7-1 to 2 to 0.8-1.2 and mixing in a mixing machine for 5-10 hr; pressing the mixture at 50-100 MPa pressure the form lumps; and high temperature roasting in a furnace under vacuum or Ar atmosphere in the temperature raising rate of 10-40deg.c/min to 550-850deg.c and maintaining for 5-30 min. The synthesis process has short synthesis period, low temperature, wide temperature range and low cost, and is suitable for industrial production.

Description

technical field [0001] The invention relates to a preparation method of a new high-conductivity ceramic powder, in particular to a low-temperature batch synthesis of tin carbide titanium Ti 2 Preparation method of SnC Background technique [0002] Ti 2 SnC is a new type of ternary layered compound, which combines the advantages of metal and ceramics, such as high electrical conductivity, high modulus, self-lubrication, easy processing, and corrosion resistance. This new material has attracted great attention and great research interest from researchers. Ti 2 SnC has a wide range of application prospects, such as high-speed current receiving friction parts, conductive ceramic parts, corrosion-resistant parts, seals, etc. In addition, Ti 2 SnC powder can also be used as a reinforcing agent, which can not only improve the strength and modulus of the composite material, but also improve its electrical conductivity accordingly. Therefore, the synthesis of Ti 2 SnC powder h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/00C01G19/00C01B31/30
Inventor 李世波翟洪祥贝国平周洋
Owner BEIJING JIAOTONG UNIV
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