Synthesis of Silylborazines and Their Utilization as Precursors to Silicon-Containing Boron Nitride

Silicon-Based Polymer-Derived Ceramics: Synthesis Properties and Applications-A Review

“…Alternative synthetic approaches to SiBCN polymers starting from functionalized borazines were published by Srivastava 6 and Haberecht 10,154 as well. Polyborosilazanes are the second class of precursors capable to form SiBCN ceramics.…”

“…Many examples of ultra high temperature stable polymer-derived ceramics have been published [1][2][3][4][5][6][7][8][9][10] although the process is a relatively young area of research. A continuing series of workshops related to this topic take place regularly since 1998 at the University of Colorado at Boulder see http:me-www.colorado.eduà rajr ultratemp.…”

“…[61][62][63][64][65][66][67] Another route for the synthesis of Si-B-C-N ceramics is by means of thermolysis of borazine-based oligosilazanes 2,6,[68][69][70][71][72][73] or boron-modified polysilylcarbodiimides. [74][75][76] Thus, a great variety of preceramic organosilicon polymers have been developed that could be used to produce ceramic materials with a wide range of compositions in the system Si-B-C-N-O and additional metallic constituents, such as Ti, Al and Zr.…”

Polymer-Derived SiBCN Ceramic and their Potential Application for High Temperature Membranes Dedicated to Prof. Dr.-Ing. Dr.h.c. Hartmut Fuess on the occasion of his 65th birthday

“…[1][2][3][4][5][6][7][8][9] Indeed, the chemical modification of the silazane system by the incorporation of boron is reported to form ceramics in the quaternary system SiBCN with high thermal stability in inert or oxidative atmosphere. In particular, boron-modified polysilazanes interconnected via C-B-Cbridges, 4,7 pinacolborane and borazine-hydridopolysilazanes 10 as well as polysilazanes bridged via N-B-N-units 3,11 have been shown to be promising preceramic polymers for providing such materials.…”

Thermodynamic stability of solid and fluid phases in the Si3B3N7 system

“…In addition we study the stability of the amorphous and crystalline phases in the solid state against the decomposition into the binary phases h-BN and β-Si 3 N 4 as function of the size of the crystallites involved, and the stability of the melt against evolution of nitrogen as function of nitrogen pressure. One of the most fascinating new classes of high-technology materials are the amorphous nitridic ceramics of the composition a-Si x B y N 1 C z [1,2,3,4,5,6,7,8,9,10,11] such as a-Si 3 B 3 N 7 and a-SiBN 3 C. These compounds are synthesized via the sol-gel route and exhibit a very high stability against crystallization up to 1900 K and 2100 K for a-Si 3 B 3 N 7…”