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Quaternary ceramics, synthesis

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. [Pg.987]

Herrig, H., Hempelmann, R. Microemulsion mediated synthesis of ternary and quaternary nanoscale mixed oxide ceramic powders. Nanostruct. Mater. 9,241-244 (1997)... [Pg.365]

See other pages where Quaternary ceramics, synthesis is mentioned: [Pg.130]    [Pg.153]    [Pg.204]    [Pg.2224]    [Pg.2934]    [Pg.981]    [Pg.2933]    [Pg.981]    [Pg.177]    [Pg.179]    [Pg.2224]   
See also in sourсe #XX -- [ Pg.12 , Pg.64 ]



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Quaternary synthesis

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