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2005年08月30日

【期刊论文】Preparation, microstructure and properties of reaction-bonded AIN ceramics

蔡克峰， K. F. Cai*，， D. S. McLachlan

K. F. Cai, D. S. McLachlan/Materials Research Bulletin 37(2002)575-581，-0001，（）：

-1年11月30日

AIN ceramics were prepared via aa reaction-bonding technique, using Al and AIN powders as the starting materials. The effects of processing parameters and CaO as an additive were investigated. An AIN ceramic sintered at 1800℃ with 0.5 wt.% CaO is highly densified and its dielectric constant and dielectric loss tgδ are 9.4 and 0.0002 at 1 MHz, respectively, Its electrical resistivity and Vickers hardness are 2.88×1012Ωcm, 1210kg/mm2, respectively.

A.， Nitrides， A.， Ceramics， B.， Chemical synthesis， C.， X-ray diffraction， D.， Dielectric properties

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2005年08月30日

【期刊论文】Effect of porosity on the thermal-electric properties of Al-doped SiC ceramics

蔡克峰， KE-FENG CAI， JIN-PING LIU， CE-WEN NAN， XIN-MIN MIN

，-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 effects of annealing on thermal and electrical properties of reaction-bonded AlN ceramic

蔡克峰， K. F. Cai a， b， c， *， D. S. McLachlan c， G. Sautic， E. Mueller b

K. F. Cai et al./Solid State Sciences 7(2005)945-949，-0001，（）：

-1年11月30日

摘要

An AlN ceramic sample was prepared using a reaction-bonding technique with Al and AlN powders, together with a very small amount of CaO (a sintering aid), as the starting materials. The effects of annealing at 1800℃ for 10 h in one atmosphere of Ar on the thermal and electrical properties of the ceramic were investigated. After annealing the thermal conductivity of the ceramic increased from 55 to 122W/mK, while the AC electrical conductivity, measured as a function of frequency, decreased. The difference in AC electrical conductivity before and after annealing gradually increased as the frequency decreased, reaching about one order of magnitude at 0.01Hz. The composition and microstructure were examined by means of XRD and SEM/EDS. The causes for the improvement in thermal and electrical properties due to the annealing are discussed.

Annealing， Nitrides， Microstructure， Thermal conductivity， Electrical properties

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2005年08月30日

【期刊论文】Sol-gel processing of ZnO-coated TiB2 composite powders

蔡克峰， K. F. Cai a， b， *， E. Mueller a， C. Drasar a， A. Mrotzek a

K. F. Cai et al./Materials Letters 57(2003)4251-4255，-0001，（）：

-1年11月30日

摘要

A sol-gel method for the preparation of ZnO-coated TiB2 composite powders, using inexpensive zinc acetate, is described. It yields composite powders of TiB2 particles coated with fine ZnO grains. The composite powders can be hot pressed at relatively low temperature and a 10 vol.%TiB2-ZnO sample shows much better thermoelectric (TE) properties than pure ZnO ceramic.

Composite materials， Sol-gel preparation， Thermal properties， Electrical properties

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