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

Inactive Publication Date: 2002-05-22
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nano-TiN-Al 2 o 3 There are few researches on composite materials. In addition, the method of mechanical ball milling often causes the agglomeration of the added phase, or leads to the deviation of local components, which ultimately affects the mechanical properties and electrical conductivity of composite materials.

Method used

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  • Prepn of conductive composite nanometer titanium nitride-alumina material
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  • Prepn of conductive composite nanometer titanium nitride-alumina material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1 25 vol% TiN-75 vol% Al 2 o 3 Preparation of composite materials

[0031] Get butyl titanate 92g, aluminum nitrate (Al(NO 3 ) 3 .9H 2 O) 266g was dissolved in 1200ml absolute ethanol solution, and the absolute ethanol solution of butyl titanate and aluminum nitrate was added dropwise to 6M dilute ammonia solution under vigorous stirring, hydrolyzed and precipitated at 30°C for 15 hours , filter the hydrolyzed and precipitated product, wash with distilled water to remove impurities, and wash twice with absolute ethanol, dry the filter cake at 120°C for 8h, grind, pass through a 200-mesh sieve, and then calcined at 450°C for 2h. Put the obtained nano-titania-alumina composite powder into a quartz crucible, put it into a tubular atmosphere furnace, feed ammonia gas, the flow rate of ammonia gas is 2 liters / minute, and the temperature is raised to 950 ° C, and the heating rate is 15 ° C / minute. It was kept at this temperature for 4 hours, and then naturally...

Embodiment 2

[0033] Example 2 20 vol% TiN-80 vol% Al 2 o 3 Preparation of composite materials

[0034] Get butyl titanate 46g, aluminum chloride (AlCl 3 .6H 2O) 164g was dissolved in 1000ml of absolute ethanol solution, and the absolute ethanol solution of butyl titanate and aluminum chloride was added dropwise to 4M dilute ammonia solution under vigorous stirring, hydrolyzed and precipitated at 45°C for 8 hours, filter the hydrolyzed and precipitated product, wash with distilled water to remove impurities, and wash twice with absolute ethanol, dry the filter cake at 120°C for 8h, grind, pass through a 200-mesh sieve, and then calcined at 450°C for 2h. Put the obtained nano-titania-alumina composite powder into a quartz crucible, put it into a tubular atmosphere furnace, feed ammonia gas, the flow rate of ammonia gas is 1 liter / min, and the temperature is raised to 900 ° C, and the heating rate is 10 ° C / minute. It was kept at this temperature for 5 hours, and then naturally cooled ...

Embodiment 3

[0036] Example 3 10 vol% TiN-90 vol% Al 2 o 3 Preparation of composite materials

[0037] Take 30g of isopropyl titanate and 68g of aluminum isopropoxide dissolved in 500ml of absolute ethanol solution, add the absolute ethanol solution drop by drop to distilled water under vigorous stirring, filter the hydrolyzate, wash with distilled water for two Once to remove impurities, and then washed twice with absolute ethanol, the filter cake was dried at 120°C for 10h, ground, passed through a 200-mesh sieve, and then calcined at 450°C for 4h. Put the obtained nano-titania-alumina composite powder into a quartz crucible, put it into a tubular atmosphere furnace, feed ammonia gas, the flow rate of ammonia gas is 3 liters / min, and the temperature is raised to 850 °C, and the heating rate is 10 °C / min. minute. It was kept at this temperature for 5 hours, and then naturally cooled to room temperature under flowing ammonia gas. A nanometer titanium nitride-alumina composite powder is...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/117C04B35/622C04B35/645H01B1/08
Inventor 高濂李景国
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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