Abstract
A series of samples of hexagonal boron nitride-aluminum nitride ceramic composites with different amounts of CaF2 as sintering aid were prepared by spark plasma sintered at 1700–1850 °C for 5 min. The addition of CaF2 effectively lowered the sintering temperature and promoted the densification of AlN-BN composites. With the increase of sintering temperature, the density increased, and the contiguity of AlN grains enhanced in AlN-BN composites. Thermal conductivity of AlN-BN composites increased with the increase in CaF2 content and sintering temperature, and there is a maximum value of 78.6 W·m−1·K−1 when the sample with 3wt% CaF2 sintered at 1800 °C.
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Funded by New Century Excellent Talents in University of the Ministry of Education of China (No. NCET-04-0722) and Doctoral Fund of Ministry of Education of China (No. 20060497003)
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Zhao, H., Wang, W., Wang, H. et al. Spark plasma sintered AlN-BN composites and its thermal conductivity. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 23, 866–869 (2008). https://doi.org/10.1007/s11595-007-6866-4
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DOI: https://doi.org/10.1007/s11595-007-6866-4