Improved durability of Si/B/N/C random inorganic networks

Borazine Based Molecular Single Source Precursors for Si/B/N/C Ceramics

“…Single source molecular precursors of the general type R 1 R 2 R 3 Si-X-BR 4 R 5 with X = NH [1, [8][9][10], N(CH 3 ) [11][12][13], CH 2 [14,15], C 2 H 4 [16] and R 1 -R 5 = CH 3 or Cl have proven to perform particularly well with respect to versatility and quality of the final ceramic. As measured by the combination of properties relevant for an application as structural ceramics at high temperature, the Si/B/N/C ceramics show superior performance [6].…”

Synthesis, Characterization and Performance Study of Borosilazane as UV-Curable Borazine-Type Single Source Precursors for SiBNC Ceramic

“…目前针对陶瓷先驱体 UV 光固化的研究, Bowman 等 [5,6] 用乙烯基聚硅氮烷 (VL20)与巯基化合物组成共聚体系, 重点研究了巯基与 乙烯基配比、UV 辐照强度和引发剂浓度对巯基和乙烯 基官能团转化率、固化物尺寸收缩的影响. 李义和等 [7,8] [18,19] . 因此可以确定: …”

Polymer-Derived Non-Oxide Ceramic Fibers—Past, Present and Future

“…30 Incorporating boron in the SiBCN ceramic system has been achieved by using various boron containing polymer precursors (i.e., borazine-substituted polysilazane, crosslinked borane/borazine derivatives and borane crosslinked dichlorovinylsilanes) to improve the thermal stability and oxidation resistance. [31][32][33][34][35][36][37][38][39][40][41] The resulted SiBCN bulk ceramics retain their amorphous structures usually at 1600 C and even up to 2200 C, attributed to the presence of boron in the ceramic to retard the crystallization process. 42 The oxidation resistance is improved by the formation of a sub-layer of a mixture of SiBCNO glass with BN precipitates upon the exposure to oxygen at high temperature.…”