Boron thermal properties

Up to the early 1990s, the only rare earth boride known with RB (n > 12) was RB66. These compounds have been primarily studied for their interesting structure and structurally derived features like the amorphous behavior of thermal properties. However, in a recent development, new higher borides have been discovered like the RB25 and RB50 compounds. Furthermore, with addition of small amounts of 3rd elements like C, N, Si, the boron cluster framework was found to arrange... 

Summary Precursor-derived quaternary Si-B-C-N ceramics frequently possess an enhanced thermal stability compared to SiC, SisN4 or Si-C-N ceramics. The stability of the materials towards crystallization and/or decomposition is directly coimected to the molecular structure and the elemental composition of the polymeric precursors. This paper highlights recent investigations on the synthesis of boron-modified polysilazanes and polysilylcarbodiimides. Hydroboration of polyvinylsilazanes and dehydrocoupling reactions of boron-modified silanes with ammonia or amines as well as cyanamide are described. It is shown that simple organosilicon chemistry provides a means to efficiently optimize ceramic yields and tune elemental composition as well as thermal properties of the polymer-derived ceramics. 

Boron phosphide (BP), a semiconductor with an indirect band gap of 2 eV, is one of the most promising high-temperature thermoelectric materials due to its outstanding chemical, mechanical, optical and thermal properties. Traditionally, BP is... 

Chu and co-workers [8] have discussed the thermal properties of polyborosilazanes produced by exposure of hexamethyl cyclotrisilazone (HMCTS) to boron trichloride. 

Cosset, D., Query, M., and Kryger, B., Thermal Properties of Some Boron-rich Compounds, in Boron-Rich Solids, AIP Conf. Proc. 140 (D. Aselage, et al., eds), Am Inst, of Physics, New York (1986)... 

Lee C W, Pineau F J, Corelli J C, Thermal properties of neutron-irradiated SiC effects of boron doping, J. Nucl Mater. 108 109, 678 (1982)... 

Yu J, Huang X, Wu C, Wu X, Wang G, Jiang P. Interfacial modification of boron nitride nanoplatelets for epoxy composites with improved thermal properties. Polymer 2012 53 471-80. 

M Bougoin, R Fillit, F Thevenot, H Bruyas. Determination of free graphite in textured samples of boron carbide and boron-carbide-silicon carbide composites. J Less Common Met 117 215, 1986. D Gosset, M Query, B Kryger. Thermal properties of some boron-rich compounds B C and AIB12 . In D Emin, T Aselage, AC Switendick, B Morosin, CL Beckel, eds. Boron-Rich Solids, AIP Conference Proceedings 231. Albuquerque AIP, 1990, p 380. 

Gibby, R.L., 1973, Thermal Properties of Boron Carbide and Europium (HI) Oxide, in ... 

THERMAL PROPERTIES AND STRUCTURE OF INJECTION MOLDED THIN-WALL PRODUCTS OF POLYPROPYLENE/BORON-NITRIDE COMPOSITES... 

In this paper, proeessability and higher-order stmcture of thin-wall molded parts for polypropylene/hexagonal boron nitride (PP/h-BN) composites were investigated to produce new polymer composites with high heat conductivity. Effects of h-BN content and process parameters on processability, thermal property and internal morphology of molded products were discussed. 

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