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首页> 外文期刊>Crystal growth & design >Nucleation and Early Stage Crystallization of Fluorapatite in Apatite-Mullite Glass-Ceramics
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Nucleation and Early Stage Crystallization of Fluorapatite in Apatite-Mullite Glass-Ceramics

机译：磷灰石-莫来石玻璃陶瓷中氟磷灰石的成核和早期结晶

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摘要

The crystallization morphology and activation energy of fluorapatite formation in apatite-mullite glass-ceramics has been examined. A systematic change in the amount or network modifier in the base glass has demonstrated that increasing levels of network modifier cause a corresponding increase in activation energy for fluorapatite crystallization and it decrease in fluorapatite crystal size. Apatite-mullite glass-ceramics are known to phase separate and nucleate prior to crystallization. To separate these effects during activation energy determination, it nucleation hold was used to ensure the activation energy is purely for crystal growth and is not skewed by any phase separation or nucleation occurring. It is postulated that greater amounts of network modifier in the system cause the base glass to phase separate and nucleate to it greater extent during heating thus limiting the crystal growth.
机译：研究了磷灰石-莫来石玻璃陶瓷中氟磷灰石形成的结晶形态和活化能。基础玻璃中的量或网络改性剂的系统变化已证明，网络改性剂含量的增加会导致氟磷灰石结晶的活化能相应增加，而氟磷灰石晶体尺寸却减小。已知磷灰石-莫来石玻璃陶瓷在结晶之前会相分离并成核。为了在确定活化能期间分离这些效应，使用成核作用来确保活化能纯粹用于晶体生长，并且不会因发生任何相分离或成核作用而偏斜。可以推测，体系中大量的网络改性剂会导致基础玻璃在加热过程中发生相分离并在更大程度上成核，从而限制了晶体的生长。

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