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Method for synthesizing aluminium-titanium carbonate ceramic powder

A technology of ceramic powder and synthesis method, which is applied in the synthesis of aluminum carbide titanium ceramic powder, low-cost aluminum carbide Ti3AlC2 ceramic powder in the field of normal pressure synthesis, and can solve the problem of affecting the purity and performance of the powder and difficult control of temperature parameters , elemental Al volatilization loss and other issues, to achieve the effect of wide synthesis temperature range, stable sintering process parameters, and reduced high temperature loss

Inactive Publication Date: 2007-11-14
BEIJING JIAOTONG UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0005] 1) There are Ti powder and C powder in the ingredients, the two react violently, release a large amount of heat, and a "thermal explosion" phenomenon occurs, which leads to a sharp rise in the temperature of the system, resulting in serious volatilization loss of simple Al, thus changing the composition of each component in the system The proportion of the reaction affects the Ti 3 AlC 2 the purity of
[0006] 2) The phenomenon of "hot explosion" during the reaction will cause sharp fluctuations in the temperature in the furnace, and the temperature parameters during the synthesis process are not easy to control
[0007] 3) There is usually a TiC impurity phase in the product, which affects the Ti 3 AlC 2 The purity and performance of the powder;
[0008] 4) In particular, the content of Ti powder used in the above-mentioned ingredients is relatively large, and the price of Ti powder is currently high, resulting in the synthesis of Ti 3 AlC 2 Powder cost is too high

Method used

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  • Method for synthesizing aluminium-titanium carbonate ceramic powder
  • Method for synthesizing aluminium-titanium carbonate ceramic powder

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Experimental program
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Effect test

Embodiment 1

[0026] Embodiment 1: a kind of synthetic method of aluminum carbide titanium ceramic powder, comprises the following steps;

[0027] 1) Press TiH 2 : Al: TiC: Sn=1: 1: 1: 0.1 molar ratio batching, take by weighing 16.8 grams of Ti powder, 9.1 grams of Al powder, 20.1 grams of TiC powder, 4.0 grams of Sn powder;

[0028] 2) As shown in Figure 1, put the above-mentioned ingredients into the ball mill tank and place on the ball mill for mixing for 10 hours;

[0029] 3) Press the homogeneously mixed ingredients into a block under a pressure of 30 MPa.

[0030] 4) Put the above briquettes into a high-temperature furnace in a vacuum atmosphere, raise the temperature of the furnace to 1350°C at a heating rate of 15°C / min, and hold the temperature for 15 minutes to obtain high-purity Ti 3 AlC 2 powder, the X-ray diffraction (XRD) spectrum of the powder is shown in Figure 2. As can be seen from Figure 2, the product is of high purity, except for Ti in the XRD pattern. 3 AlC 2 Bes...

Embodiment 2

[0031] Embodiment 2: a kind of synthetic method of aluminum carbide titanium ceramic powder: contain following steps;

[0032] 1) Press TiH 2 : Al: TiC: Sn=1: 1: 1: 0.1 molar ratio batching, take by weighing 16.8 grams of Ti powder, 9.1 grams of Al powder, 20.1 grams of TiC powder, 4.0 grams of Sn powder;

[0033] 2) Put the above-mentioned ingredients into the ball mill tank and place on the ball mill for mixing for 10 hours;

[0034] 3) Press the homogeneously mixed ingredients into a block under a pressure of 40 MPa.

[0035] 4) Put the above briquette into a high-temperature furnace, and in a vacuum atmosphere, raise the temperature of the furnace to 1450°C at a heating rate of 30°C / min, and hold the temperature for 10 minutes to obtain high-purity Ti 3 AlC 2 Powder, its XRD result is identical with embodiment one.

Embodiment 3

[0036] Embodiment 3: a kind of synthetic method of aluminum carbide titanium ceramic powder: contain following steps;

[0037] 1) Press TiH 2 : Al: TiC: Sn=1: 1: 1: 0.1 molar ratio batching, take by weighing 16.8 grams of Ti powder, 9.1 grams of Al powder, 20.1 grams of TiC powder, 4.0 grams of Sn powder;

[0038] 2) Put the above-mentioned ingredients into the ball mill tank and place on the ball mill for mixing for 10 hours;

[0039]3) Press the uniformly mixed ingredients into a block under a pressure of 50 MPa.

[0040] 4) Put the above briquette into a high-temperature furnace, and in a vacuum atmosphere, raise the temperature of the furnace to 1500°C at a heating rate of 40°C / min, and hold the temperature for 5 minutes to obtain high-purity Ti 3 AlC 2 Powder, its XRD result is identical with embodiment one.

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Abstract

This invention relates to a synthetic method of aluminium carbide titanium ceramic powder. The invention takes TiH2 powder, Al powder and TiC powder as raw material, add Sn as accessory ingredient, dyr mix the raw materials acoording to mol ratio of TiH2:TiC:Al:Sn=1:1:1:0.1 for 10 hours, execute piece under 30 to 50 pressure, then put at high temperature furnace, under vacuum atmosphere rise the furnace temperature to 1350 to 1550 deg by rate of 15 to 40 deg per minute, holding time for 5 to 15min, execute low cost high-purity Ti3AlC2 powder.

Description

technical field [0001] The invention relates to a synthesis method of aluminum carbide titanium ceramic powder, especially low-cost aluminum titanium carbide Ti 3 AlC 2 The invention discloses a method for synthesizing ceramic powder under normal pressure, which belongs to the technical field of ceramic material preparation. Background technique [0002] Aluminum Carbide Titanium Ti 3 AlC 2 With its excellent properties such as high electrical conductivity, anti-oxidation, thermal shock resistance, corrosion resistance, self-lubrication, and easy processing, it has become the preferred material for bearings, high-temperature structural components, and high-speed electrified friction components. Preparation of various components for engineering applications not only requires large quantities of low-cost Ti 3 AlC 2 powder, and Ti 3 AlC 2 The powder must be of high purity, especially not containing TiC impurity phase. Because of the presence of impurity phases, the Ti ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/56C04B35/622
Inventor 李世波向卫华陈新华翟洪祥周洋
Owner BEIJING JIAOTONG UNIV
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