Prepn of conductive composite nanometer titanium nitride-alumina material

A nano-titanium nitride and composite material technology, applied in the direction of oxide conductors, non-metallic conductors, etc., can solve the problems of local component deviation, additive phase agglomeration, and less composite materials
CN1349950AInactive Publication Date: 2002-05-22SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
Publication Date
2002-05-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The method for preparing conductive nano titanium nitride-aluminium oxide composite material includes the following steps: using titanium-contained compound and aluminium-contained compound and adopting coprecipitatino method to prepare nano titanium nitride-aluminium oxide composite powder body firstly, in the atmosphere of ammonia gas placing said nano titanium nitride-aluminium oxide compositepowder body into the tubular reactor to make high-temp. nitridation to obtain nano titanium nitride-aluminium oxide composite powder body, finally, adopting hot-pressing and sintering process to obtain conductive nano titanium nitride-aluminium oxide composition material. Its composition range is that TiN / Al2O3 (volume ratio) is 5 / 95-25 / 75, under the optimization condition its resistance is 1.5-8X10 to the minus third ohm.cm. Said nano material possesses good microstructare and higher conductivity, and the titanium nitride nano granule size is less than 100 nanometers.
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Description

technical field

[0001] The invention relates to a preparation method of conductive nanometer titanium nitride-alumina composite material. The invention belongs to the field of alumina-based composite materials. Background technique

[0002] al 2 o 3 It is the most widely used structural ceramic material, since Japanese scientists reported that Al 2 o 3 Since the addition of nanoparticles to the matrix has greatly improved the mechanical properties of the material, Al 2 o 3 Base nanocomposite ceramics has become a remarkable research field in the materials field.

[0003] TiN is a new type of material, which has the characteristics of high hardness (microhardness of 21Gpa), high melting point (2950°C), and good chemical stability. It is a good refractory and wear-resistant material. Titanium nitride also has good electrical conductivity (room temperature resistance is 3.34×10 -7 Ω.cm), which can be used as conductive materials such as electrodes and electrical contact...

Claims

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