掺铒氧氟磷酸盐玻璃的成核与生长行为

Nucleation and growth behavior of Er doped oxyfluorophosphate glasses.

作者信息

Ojha N, Szczodra A, Boetti N G, Massera J, Petit L

机构信息

Photonics Laboratory, Tampere University Korkeakoulunkatu 3 FI-33720 Tampere Finland

Fondazione LINKS - Leading Innovation & Knowledge for Society Via P. C. Boggio 61 10138 Torino Italy.

出版信息

RSC Adv. 2020 Jul 7;10(43):25703-25716. doi: 10.1039/d0ra04681g. eCollection 2020 Jul 3.

DOI:10.1039/d0ra04681g

PMID:35518613

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9055356/

Abstract

The nucleation and growth behavior of glasses with the composition (75 NaPO-25 CaF) -(TiO/ZnO/MgO) , with = 0 and = 1.5 (in mol%) is investigated. The glasses possess similar activation energy for crystallization and Johnson-Mehl-Avrami exponent, with value 2 confirming bulk crystallization of crystals with needle like shape. The Ti and Mg glasses exhibit broader nucleation curve and higher than the = 0 and Zn glasses due to their stronger field strength. The crystal growth rates were determined and validated using SEM. Finally, we showed that the nucleation and growth of glasses can be controlled due to the large difference between onset of crystallization and maximum nucleation temperature which is crucial when preparing novel transparent glass-ceramics.

摘要

研究了组成为(75NaPO - 25CaF)-(TiO/ZnO/MgO)、x = 0和x = 1.5（摩尔%）的玻璃的成核和生长行为。这些玻璃具有相似的结晶活化能和约翰逊-梅尔-阿夫拉米指数，其值为2证实了针状晶体的体结晶。由于Ti和Mg玻璃具有更强的场强，它们比x = 0的玻璃和Zn玻璃表现出更宽的成核曲线和更高的G值。使用扫描电子显微镜确定并验证了晶体生长速率。最后，我们表明，由于结晶起始温度和最大成核温度之间的巨大差异，玻璃的成核和生长是可以控制的，这在制备新型透明玻璃陶瓷时至关重要。