Mechanical activation-reaction heat treating preparation process of nanometer titanium carbonitride

A titanium carbonitride nanometer, mechanically activated technology, applied in nitrogen compounds, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of limited large-scale production, large product particle size, and high raw material cost, and achieve industrial-scale production. , good dispersion, cheap raw materials

Inactive Publication Date: 2007-06-06
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Analyzing the above methods, it will be found that they generally have one or more disadvantages such as high raw material cost, cumbersome proces

Method used

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  • Mechanical activation-reaction heat treating preparation process of nanometer titanium carbonitride

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Experimental program
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Embodiment 1

[0032] In the present embodiment, raw material is nano-titanium oxide and nano-carbon powder, has the following process steps according to process flow chart 1:

[0033] (1) Ingredients

[0034] The mol ratio of nanometer carbon powder and titanium oxide is 2.5: 1;

[0035] (2) Mechanical activation

[0036] The raw materials are activated by high-energy mechanical ball milling, the weight ratio of balls to materials is 30:1, the medium is absolute ethanol, the speed of the ball mill is 700 rpm, and the ball milling time is 4 hours;

[0037] (3) dry

[0038] Dry the wet abrasive at 70°C for 24 hours;

[0039] (4) Loading

[0040] Weigh 10g of activation material and put it into the crucible of carbon tube furnace;

[0041] (5) Reactive heat treatment

[0042] Evacuate the carbon tube furnace to a vacuum of 2.0×10 -2 At MPa, start heating at 20°C / min, keep warm at 900°C for 5 minutes, and pass nitrogen gas at the end of the heat preservation until the pressure is 0.005MP...

Embodiment 2

[0046] In the present embodiment, raw material is nano-titanium oxide and nano-carbon powder, has the following process steps according to process flow chart 1:

[0047] (1) Ingredients

[0048] The mol ratio of nanometer carbon powder and titanium oxide is 2.7: 1;

[0049] (2) Mixing

[0050] Perform high-energy mechanical ball milling activation (dry milling) on ​​the prepared raw materials, the ball-to-material weight ratio is 30:1, the ball mill speed is 700 rpm, and the ball milling time is 2 hours;

[0051] (3) Loading

[0052] Weigh 10g of activated raw material and put it into the crucible of the carbon tube furnace;

[0053] (4) Reactive heat treatment

[0054] Fill the carbon tube furnace with nitrogen to a pressure slightly greater than 1 standard atmosphere, then flow nitrogen and heat at 15°C / min at the same time, keep warm for 2 hours after reaching 1250°C;

[0055] (5) Sieve

[0056] The reaction heat treatment product is sieved to obtain the product.

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Abstract

The mechanical activation-reaction heat treatment process of preparing nanometer titanium carbonitride powder with nanometer titania and nanometer carbon powder as material includes the technological steps of: compounding, mechanical activating, (drying,) loading, reaction heat treatment, and sieving. The process is simple, low in cost and easy in industrial scale production. By means of controlling C/Ti ratio, mechanical ball milling activation time, reaction heat treatment temperature and time, nitrogen pressure and other technological factors, nanometer titanium carbonitride powder in different carbon contents ay be synthesized. The prepared nanometer titanium carbonitride powder is spherical, and has high dispersivity, average granularity below 100 nm and purity over 99 %.

Description

1. Technical field [0001] The invention relates to a mechanical activation-reaction heat treatment preparation method of titanium carbonitride nanometer powder. 2. Background technology [0002] Titanium carbonitride is widely used in the preparation of advanced ceramic matrix composite materials required in the fields of machinery, electronics, chemical industry, automobile manufacturing, aerospace and other fields, especially titanium carbonitride-based cermet tool materials. Studies have shown that the smaller the particle size of titanium carbonitride powder, the better the mechanical properties of the bulk material it prepares. At present, known methods for preparing submicron, ultrafine and nanometer powders of titanium carbonitride include plasma methods, such as application number 02125986.0, titled "Technology for preparing titanium carbonitride ceramic powders by plasma chemical vapor phase synthesis". Chinese patent application for "; Combustion synthesis method,...

Claims

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Application Information

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IPC IPC(8): C01G23/00C01B31/30C01B21/00C04B35/58C04B35/626
Inventor 刘颖向道平张岩夏珊陈帮桥高升吉涂铭旌
Owner SICHUAN UNIV
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