Crystallization mechanism of Bi2Ti2O7 from 0.25Bi2O3-TiO2-0.25Na2O-SiO2 glass

被引：3
|
作者：
Kwon, O. H. [1 ]
Baek, C. G. [1 ]
Rim, Y. H. [2 ]
Ko, J. H. [3 ]
Kim, C. S. [4 ]
Yang, Y. S. [1 ]
机构：
[1] Pusan Natl Univ, Coll Nanosci & Nanotechnol, Busan 46241, South Korea
[2] Semyung Univ, Coll Liberal Arts, Chungbuk 27136, South Korea
[3] Hallym Univ, Nano Convergence Technol Ctr, Dept Phys, Gangwondo 24252, South Korea
[4] Pusan Natl Univ, Dept Cognomechatron Engn, Busan 46241, South Korea
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2021年 / 862卷
基金：
新加坡国家研究基金会;
关键词：
0.25Bi(2)O(3)-TiO2-0.25Na(2)O-SiO2 glass; Bi2Ti2O7; crystal; crystallization kinetics; phonon modes; SILICATE-GLASSES; KINETICS; DECOMPOSITION; RELAXATION; CHEMISTRY;
D O I：
10.1016/j.jallcom.2020.158010
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We have studied the crystallization kinetics of pyrochlore Bi2Ti2O7 (BTO) from 0.25Bi(2)O(3)-TiO2-0.25Na(2)O-SiO2 (BTNSO) glass under isothermal and non-isothermal conditions. On the course of crystallization, only BTO crystal within the confined size under 100 nm is formed and the rest of the components of asquenched BTNSO glass remains as a remanent glass even at the final stage of crystallization. The crystallization mechanism of BTO belongs to a constant nucleation rate with the diffusion-controlled growth and any heterogeneous nucleation or impingement in growth is not pronounced. The change of phonon modes in the senses of energy and population for different phases enables us to get the insight of crystallization in the view of both macroscopic and microscopic points. (C) 2020 Elsevier B.V. All rights reserved.
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页数：7
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