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2005年08月30日

【期刊论文】Preparation, microstructures and properties of Al2O3-TiC composites

蔡克峰， K. F. Cai a， *， D. S. McLachlan a， N. Axenb， R. Manyatsa b

K.-F. Cai et al./Ceramics International 28(2002)217-222，-0001，（）：

-1年11月30日

Al2O3-TiC composites with various amounts of TiC, from 16 to 30 vol.%, were pressureless-sintered using 1 wt.% Al as an additive. The electrical conductivity, Vickers hardness, fracture toughness and wear resistance of the composites were studied. The hardness and toughness increased gradually with the increase of TiC volume fraction. The electrical conductivity increased with the increase of TiC volume fraction and increased about 10 orders of magnitude as the TiC volume fraction changed from 0.20 to 0.23. A sample whose TiC volume fraction is 0.23, which is close to its percolation threshold, had the best wear resistance.

B.， Composites， B.， Microstructure， D.， Alumina， Properties， Titanium carbide

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2005年08月30日

【期刊论文】Preparation and thermoelectric properties of Al-doped ZnO ceramics

蔡克峰， K. F. Cai a， b， *， E. Müller a， C. Drašar a， A. Mrotzek a

K. F. Cai et al./Materials Science and Engineering B104(2003)45-48，-0001，（）：

-1年11月30日

摘要

Al2O3 added ZnO powders were prepared via sol-gel processing, using zinc acetate, ammonia and Al2O3 powders as starting materials. Scanning electron microscopy (SEM) observations indicated that the Al2O3 added ZnO powders consisted of very fine particles (0.1-2m). The thermal conductivity, electrical conductivity and Seebeck coefficient of hot-pressed Al2O3 added ZnO ceramic samples were measured in dependence of temperature up to 600℃. The influence of Al2O3 addition on the thermoelectric (TE) properties of ZnO ceramics is discussed.

Zinc oxide， Semiconductor， Thermoelectric properties， Sol-gel

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2005年08月30日

【期刊论文】Preparation of Al2O3-AlON and Al2O3-AlN composites via reaction-bonding

蔡克峰， K. F. CAI*， D. S. MCLACHLAN

，-0001，（）：

-1年11月30日

摘要

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2005年08月30日

【期刊论文】The influence of W2B5 addition on microstructure and thermoelectric properties of B4C ceramic

蔡克峰， Ke-feng Cai*， Ce-Wen Nan

K.-f. Cai, C.-W. Nan/Ceramics International 26(2000)523-527，-0001，（）：

-1年11月30日

摘要

B4C and B4C-W2B5 composite ceramics are prepared via hot pressing. The composition and microstructure of the ceramics are characterized by means of X-ray diffraction (XRD), electron probe microanalysis (EPMA) and transmission electron microscope (TEM). Their electrical conductivity and Seebeck coe

B.， Microstructure， D.， Boron carbide， Composite ceramic， Thermoelectric properties， Tungsten boride

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2005年08月30日

【期刊论文】The effect of silicon addition on thermoelectric properties of a B4C ceramic

蔡克峰， Ke-feng Cai a， b， *， Ce-Wen Nan a， Xin-min Min a

K.-f. Cai et al./Materials Science and Engineering B 67(1999)102-107，-0001，（）：

-1年11月30日

摘要

A B4C ceramic doped with 0.2 at% Si is prepared via hot pressing. The composition and microstructure of the ceramic are characterized by means of X-ray diffraction (XRD) and electron probe microanalysis (EPMA). The electrical conductivity and Seebeck coefficient of the ceramic samples are measured from room temperature up to 1500 K. The electrical conductivity increases with temperature; the Seebeck coefficient also increases with temperature and rises to a value of about 320μV K-1 at 1500K. The value of the figure of merit of 0.2 at% Si-doped B4C is higher than that of undoped B4C and rises to about 1×10-4K-1 at 1500K. The reason for enhancement in the figure of merit of Si-doped B4C is discussed.

Boron carbide， Ceramics， Hot pressing， Thermoelectric properties

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