Abstract：The h-BN-SiO2 and h-BN ceramics were prepared by means of high pressure gas-solid combustion synthesis technology from powders of B, h-BN and SiO2. The nitrogen pressure and porosity of reactants that influence on ignition and products have a scope (for h-BN-SiO2, 48%≤ρ≤52%, 75MPa≤P≤85MPa; for h-BN, 48≤ρ≤52%, 95MPa≤P≤110MPa) in which the non-cracked combustion products can be obtained. The density of h-BN-SiO2 and h-BN products is up to 1.79g/cm3 and 1.70g/cm3 respectively, their bending strength 76MPa and 42.8MPa, and their hardness 212(HV) and 108(HV) respectively. The higher the nitrogen pressure, the bigger the h-BN particles. The distribution of h-BN particles is isotropy. Crystalline B7O and glasses SiO2 exist in the product. Crystalline SiO2 was disappeared because of rapid cooling from combustion temperature to 1000℃. Glass’s phases only exist at the edge of B7O, which demonstrates that SiO2 is the cause of formation of B7O.
陈贵清, 韩杰才, 杜善义. 高压气-固燃烧合成h-BN-SiO2和h-BN陶瓷材料的研究[J]. 材料工程, 2001, 0(10): 9-12.
CHEN Gui-qing, HAN Jie cai, DU Shan yi. Investigation of High Pressure Gas-Solid Combustion Synthesis h-BN-SiO2 and h-BN Ceramics. Journal of Materials Engineering, 2001, 0(10): 9-12.
 Hagio T, Kobayashi K,Yoshida H. J Am Ceram Soc, 1989,72:482-484.  Hagio T, Yoshida H. J of Mater Sci Lett, 1994, 13: 653-485.  Miyazaki Yuji, Harada Hiroshi, Sakamaki Shozo, et al. J of Ceram Soc of Japan, 1991, 99: 582-585.  Hoening C L. USA, PAT-APPL-7-539393, 1990.  Xaio D, Gonsalves K E, Strutt P R, et al. Ceram Eng and Sci proc, 1993, 14 (9-10): 1107-1114.  Kanal Takao, Ando Akiro, Tanemoto Kei. Jap J of Appl Phy,1992, 31 (5A): 1426-1427.  Saidi A. J of Mater Sci, 1994, 29: 4993-4998.  Deevi S, Munir Z A. J Mater Res, 1990, 5: 2177-2183.  Mare Costantino, Carlo Firpo. J Mater Res, 1991,6 (11): 2397-2403.  Munir Z A, Holt J B. J of Mater Sci, 1987, 22: 710.