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Novel method for preparing nano-carbon titanium nitride powder with precursors

A technology of titanium carbonitride powder and titanium carbonitride, which is applied in the field of high-temperature structural ceramic powder material preparation, can solve the problems of easy hydrolysis of raw materials, need for template agents, complicated process, etc., and achieve high reactivity and small grain size , The effect of simple process

Inactive Publication Date: 2010-06-09
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional preparation method of mesoporous structure has the disadvantages of high cost, complex process, extremely easy hydrolysis of raw materials, and the need for templates.

Method used

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  • Novel method for preparing nano-carbon titanium nitride powder with precursors

Examples

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Effect test

example 1

[0039] (1) raw materials: liquid alkane mixture (C 11 -C 16 ) 1000ml, absolute ethanol 5000ml, hydrated titanium dioxide 100g.

[0040] (2) Reflux: reflux 100g of hydrated titanium dioxide and 1000ml of absolute ethanol at 70°C for one hour, then filter; mix the resulting precipitate with fresh 1000ml of absolute ethanol, and reflux at 70°C for one hour again, the above reflux process Repeat 5 times, reuse after the ethanol purification after solid-liquid separation; Then filter the precipitate gained with 1000ml liquid alkane mixture (C 11 -C 16 ) first reflux at 120°C for 48 hours, then filter the powder, repeatedly extract the ethanol in the alkane filtrate with distilled water, and then add an appropriate amount of anhydrous CaCl to the filtrate 2 Remove the remaining water to obtain a reusable alkane mixture, mix the regenerated liquid alkane mixture with the filtered powder and reflux at 150°C for 48 hours, use the same method as above to obtain a recycled alkane mixt...

example 2

[0047] (1) raw materials: liquid alkane mixture (C 11 -C 16 ) 1000ml, absolute ethanol 5000ml, hydrated titanium dioxide 200g.

[0048] (2) Reflux: reflux 200g of hydrated titanium dioxide and 1000ml of absolute ethanol at 85°C for one hour, then filter; mix the resulting precipitate with fresh 1000ml of absolute ethanol, and reflux at 85°C for one hour again, the above reflux process Repeat 5 times; Then filter the precipitate obtained with 1000ml liquid alkane mixture (C 11 -C 16 ) first reflux at 120°C for 24 hours, then filter the powder, repeatedly extract the ethanol in the alkane filtrate with distilled water, and then add an appropriate amount of anhydrous CaCl to the filtrate 2 Remove the remaining water to obtain a reusable alkane mixture, mix the regenerated liquid alkane mixture with the filtered powder and reflux at 150°C for 48 hours, use the same method as above to obtain a recycled alkane mixture, and then Reflux at 180° C. and 210° C. for 48 hours respecti...

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Abstract

The invention discloses a new method for preparing a titanium carbonitride namometer powder by adopting nitrogen atmosphere heat treatment and using organic and inorganic mesoporous composites as precursors. Cheap hydrated titanium dioxide powder is used as the titanium source, and a liquid alkane mixture (C11-C16) is used as the carbon source, carbon coating is realized by stepwise gradual temperature rise and refluxing, and the precursors with mesoporous characteristics are prepared by using the volume contraction caused by the partial crystallization of titanium oxide in the process of refluxing. The titanium carbonitride namometer powder is prepared by adopting nitrogen atmosphere heat treatment with the precursors at a relatively low temperature (not more than 1350 DEG C). The averageparticle size of the titanium carbonitride powder prepared by the method is 30-50nm; and the average grain size is 10-30nm. The method has the advantages of simple technology, low cost and energy saving compared with the common preparation methods, and feasibility for large-scale industrial production.

Description

technical field [0001] The invention belongs to the field of preparation of high-temperature structural ceramic powder materials, and in particular relates to a method for preparing titanium carbonitride ceramic nano-powders by using a novel mesoporous organic-inorganic compound as a precursor for heat treatment in a nitrogen atmosphere (carbothermal nitriding method). Background technique [0002] In recent years, transition metal carbonitrides have aroused great interest of researchers due to their important scientific value and potential huge application prospects, and people are competing to use different ideas to synthesize such carbonitrides. [0003] Titanium carbonitride is one of the most important functional structural materials among transition metal carbonitrides. It has high strength, high hardness, high temperature resistance, acid and alkali resistance, wear resistance, low work function and good electrical and thermal conductivity, etc. A series of advantages...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B21/076
Inventor 姚亚东尹光福邵伟李永第康云清廖晓明黄忠兵刘飞
Owner SICHUAN UNIV