Flexural Strength of Polysiloxane-Derived Strontium-Doped SiOC Ceramics

被引：5

作者：

Eom, Jung-Hye ^{[1
]}

Kim, Young-Wook ^{[1
]}

机构：

[1] Univ Seoul, Dept Mat Sci & Engn, Funct Ceram Lab, Seoul 130743, South Korea

来源：

JOURNAL OF THE KOREAN CERAMIC SOCIETY | 2015年 / 52卷 / 01期

关键词：

Silicon oxycarbide; Flexural strength; Polysiloxane;

D O I：

10.4191/kcers.2015.52.1.61

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effect of Sr addition on the flexural strength of bulk SiOC ceramics was investigated in polymer-derived SiOC ceramics prepared by conventional hot pressing. Crack-free, dense SiOC discs with a 30 mm diameter were successfully fabricated from commercially available polysiloxane with 1 mol% strontium isopropoxide derived Sr as an additive. Agglomerates formed after the pyrolysis of polysiloxane led to the formation of domain-like structures. The flexural strength of bulk SiOC was strongly dependent on the domain size formed and Sr addition. Both the minimization of the agglomerate size in the starting powders by milling after pyrolysis and the addition of Sr, which reinforces the SiOC structure, are efficient ways to improve the flexural strength of bulk SiOC ceramics. The typical flexural strength of bulk Sr-doped SiOC ceramics fabricated from submicron-sized SiOC powders was similar to 209 MPa.

引用

页码：61 / 65

页数：5

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