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相关概念视频

Crystal Growth: Principles of Crystallization01:25

Crystal Growth: Principles of Crystallization

2.2K
Crystallization is a phase transformation process in which crystals are precipitated from a supersaturated solution or formed from other sources. During crystallization, atoms or molecules arrange themselves into a well-defined, rigid crystal lattice to minimize energy.
Initiating crystallization involves manipulating the concentration of the solute and the temperature of the solution. Since crystal growth occurs when the ratio of concentration and solubility of the solute in the solvent...
2.2K
Recrystallization: Solid–Solution Equilibria01:10

Recrystallization: Solid–Solution Equilibria

1.1K
Recrystallization is a purification technique used to separate impurities from solid compounds. In this technique, no chemical reactions occur. Instead, it exploits physical properties only, specifically, the solubility differences between the desired compound and impurities, either at a single temperature or at different temperatures, and under other selected conditions. The solid-solution equilibrium (solubility equilibrium) of each component in the solution represents a binary phase...
1.1K

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相关实验视频

Updated: Jul 27, 2025

The Effect of Interfacial Chemical Bonding in TiO2-SiO2 Composites on Their Photocatalytic NOx Abatement Performance
11:47

The Effect of Interfacial Chemical Bonding in TiO2-SiO2 Composites on Their Photocatalytic NOx Abatement Performance

Published on: July 4, 2017

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在TiO中结晶的动力学研究.

Zhen Wang1,2, Renze Xu1

  • 1State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.

Materials (Basel, Switzerland)
|June 10, 2023
PubMed
概括

在CaO-SiO2-Al2O3-TiO2玻璃中的二氧化 (TiO2) 作为核化剂,促进了高达14%的沃拉斯托尼特晶体生长. 超过18%的TiO2,它阻碍了结晶,增加了生长能量.

科学领域:

  • 材料科学 材料科学 材料科学
  • 玻璃陶技术 玻璃陶技术
  • 结晶运动学 结晶运动学

背景情况:

  • 对CaO-SiO2-Al2O3-TiO2玻璃的非异热结晶对于开发先进的玻璃陶至关重要.
  • 了解核和生长机制是控制玻璃陶特性的关键.

研究的目的:

  • 在CaO-SiO2-Al2O3-TiO2玻璃中研究非异热结晶的动力学研究.
  • 为了确定TiO2含量对晶相形成和生长动力学的影响.
  • 为了阐明TiO2在"核和"条件下作为核化剂的作用.

主要方法:

  • 差异热分析 (DTA) 用于研究结晶过程.
  • 马图斯塔-萨卡方程被用于动力分析.
  • 玻璃样本具有不同的TiO2含量和颗粒大小 (<58微米) 经过热处理.

主要成果:

  • 形成了三种晶体相:CaSiO3,Ca3TiSi2 ((AlSiTi) 3O14,以及CaTiO3.3. 这三种晶体相分别是:CaSiO3,Ca3TiSi2 ((AlSiTi) 3O14,CaTiO3.
  • 增加TiO2将初级晶体相从CaSiO3转移到Ca3TiSi2(AlSiTi) 3O14.
  • TiO2 起到高达 14% 的有效核化剂作用,促进了 2D 瓦拉斯托尼特的生长;超过 18% 的 TiO2,它阻碍了瓦拉斯托尼特结晶并增加了激活能量 (EG).
关键词:
TiO2 2 氧化的使用方法结晶的动力学结晶的动力学不同的热分析差异.玻璃玻璃玻璃玻璃玻璃的玻璃.玻璃陶 玻璃陶 的使用方法非异热热的非异热热.污垢 污垢 污垢 污垢 污垢

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Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
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相关实验视频

Last Updated: Jul 27, 2025

The Effect of Interfacial Chemical Bonding in TiO2-SiO2 Composites on Their Photocatalytic NOx Abatement Performance
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The Effect of Interfacial Chemical Bonding in TiO2-SiO2 Composites on Their Photocatalytic NOx Abatement Performance

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Growing Protein Crystals with Distinct Dimensions Using Automated Crystallization Coupled with In Situ Dynamic Light Scattering
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Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
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结论:

  • TiO2含量极大地影响了CaO-SiO2-Al2O3-TiO2玻璃的结晶行为和动力学.
  • "核和"是理解细颗粒玻璃中的异质核和的重要条件.
  • 优化TiO2含量对于控制玻璃陶的形成和性能至关重要,特别是对于基于瓦拉斯托尼特的材料.