Kinetics of Melting and Crystallization of Phosphorus Pentoxide
Kinetics of Melting and Crystallization of Phosphorus Pentoxide
复制标题
五氧化二磷熔化和结晶动力学
DOI：
10.1063/1.1702720
复制
发表时间：
1963
影响因子：
3.2
通讯作者：
D. Turnbull
中科院分区：
文献类型：
--
作者：
R. Cormia;J. Mackenzie;D. Turnbull
用显微技术研究了四方五氧化二磷的熔融和结晶过程。熔化温度以上50°左右的过热是可能的。熔化是不均匀的，只在自由表面或晶界处开始熔化，而从不在晶体内部熔化。在过冷或过热10°时，各自的速率约为5和10 a /秒。研究了温度、时间、结晶方向、形貌和制备过程对熔融结晶的影响。在理想条件下，观察到的速率与主要基于粘度考虑的简单模型计算的速率几乎在定量上一致。
The melting and crystallization of tetragonal phosphorus pentoxide has been investigated by the use of a microscopic technique. Superheating of about 50° above the melting temperature was possible. Melting was heterogeneous and began only at free surfaces or grain boundaries but never within a crystal. At a supercool or superheat of 10°, the respective rates were approximately 5 and 10 A/sec. The dependency of melting and crystallization on temperature, time, crystal direction, morphology, and preparation history was studied. Under ideal conditions, the observed rates were in almost quantitative agreement with those calculated from a simple model based primarily on viscosity considerations.