However, the biosilica obtained by the dry ashing method from rice shells directly is cristobalite silica.
而利用干灰化法从稻壳中直接提取的硅质体是方晶石型的SiO2材料.
This paper introduces the technology characteristics of cristobalite produced by direct calcination with nubby quartz.
阐述了石英块料直接煅烧法生产加工方石英的工艺特点.
The dehydration of Si-OH group under high temperature led to the transformation of abridging oxygen of OH to bridging oxygen, which caused the disappearance of structure defects and formed the long-range order structure of cristobalite.
高温下Si OH基团的脱水反应使硅藻土结构中以OH-形式存在的非桥氧变成桥氧,原来的结构缺陷消失,有利于降低方英石的形成温度;
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