Formation of Mg-silicates by reaction of perhydropolysilazane with MgO during pyrolysis in air
Formation of Mg-silicates by reaction of perhydropolysilazane with MgO during pyrolysis in air
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DOI：
10.2109/jcersj2.16026
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发表时间：
2016-10
影响因子：
1.1
通讯作者：
M. Seifert;M. L. Leite;G. Motz
中科院分区：
文献类型：
--
作者：
M. Seifert;M. L. Leite;G. Motz
本文研究了采用聚合物衍生陶瓷（PDCs）合成Mg2SiO4 （Forsterite）的方法。采用液态无机过氢聚硅氮烷（PHPS），因为它在空气中热解时非常活跃，形成含有大量SiO2的无定形硅陶瓷。这两个事实对于与氧化镁反应合成镁硅酸盐至关重要。研究结果表明，在空气中热解2小时，在1100℃的低温条件下，MgO/SiNO界面通过固相反应形成了mg -正硅酸盐相。此外，聚硅烷的高反应性使得MgO几乎完全转化为Mg2SiO4。©2016日本陶瓷协会。版权所有。
The present study deals with the synthesis of Mg2SiO4 (Forsterite) applying the route of polymer derived ceramics (PDCs). The liquid, inorganic perhydropolysilazane (PHPS) was used because it is very reactive during pyrolysis in air and forms amorphous SiNO ceramic containing a tremendous amount of SiO2. Both facts are crucial for the reaction with MgO in order to synthesize Mg-silicates. The results of this study demonstrate, that the Mg-orthosilicate phase is formed at the MgO/SiNO interface via solid state reaction at comparably low temperatures of 1100°C during pyrolysis in air for 2 h. Furthermore the high reactivity of the polysilazane leads to an almost full conversion of the MgO to Mg2SiO4 under the used conditions. ©2016 The Ceramic Society of Japan. All rights reserved.