Abstract We have studied the crystallization kinetics of pyrochlore Bi2Ti2O7 (BTO) from 0.25Bi2O3-TiO2-0.25Na2O-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 as-quenched 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.

中文翻译：

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0.25Bi2O3-TiO2-0.25Na2O-SiO2玻璃中Bi2Ti2O7的结晶机理

摘要 我们研究了烧绿石 Bi2Ti2O7 (BTO) 从 0.25Bi2O3-TiO2-0.25Na2O-SiO2 (BTNSO) 玻璃在等温和非等温条件下的结晶动力学。在结晶过程中，仅形成 100 nm 以下受限尺寸内的 BTO 晶体，即使在结晶的最后阶段，淬火状态的 BTNSO 玻璃的其余成分仍为残余玻璃。BTO 的结晶机制属于恒定的成核速率，具有扩散控制的生长，任何异质成核或生长撞击都不明显。声子模式在能量和粒子数意义上的不同阶段的变化使我们能够从宏观和微观两个角度对结晶进行洞察。