Cs2ZnCl4:一种完全无的无机矿,具有很大的介电电容率
Imen Romdhane1, Asma Ajmi1, Mohamed Ben Bechir1
1University of Sfax, Faculty of Sciences of Sfax, Laboratory LaSCOM BP 1171 3000 Sfax Tunisia abdallahrhaiem@yahoo.fr.
RSC advances
|November 13, 2024
概括
本研究详细介绍了使用缓慢蒸发的无毒无机矿Cs2ZnCl4在室温下合成的方法. 描述揭示了其晶体结构,光学特性和电气行为,用于潜在的应用.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 晶体学 晶体学是指结晶学.
背景情况:
- 无机矿因其无毒性和易于合成而引起人们的注意.
- 金属化佩洛夫斯基特为各种应用提供了有希望的替代品.
研究的目的:
- 通过一种简单的方法合成和表征一种无毒的无机矿,Cs2ZnCl4.
- 为了研究Cs2ZnCl4.4的结构,光学和电气特性.
主要方法:
- 在室温下缓慢蒸发技术用于晶体制造.
- 用于晶体结构分析的X射线衍射 (XRD).
- 扫描电子显微镜与能量分散式X射线光谱学 (SEM-EDX) 用于形态学.
- 光学光谱 (UV-Vis,光发光) 用于频段间隙和辐射.
- 对折射率和灭绝系数进行圆测量.
- 介电光谱检测电特性 (313433 K).
主要成果:
- Cs2ZnCl4 结晶在正方体阶段 (Pnma 空间组).
- 光学研究显示,直径带间距约为3.80 eV,光发光峰值在340 nm.
- 折射率 (n) 和灭绝系数 (k) 用考西定律来确定.
- 在一个温度范围内分析了电性质 (介电常数,损耗因子,电模量).
- 电容性的热变化是由麦克斯韦-瓦格纳效应 (库普理论) 解释的.
- 用Kohlrausch-Williams-Watts (KWW) 方程评估了电模的行为.
结论:
- 缓慢蒸发的方法是有效的生产高质量的Cs2ZnCl4晶体.
- Cs2ZnCl4对潜在的设备应用具有有利的光学和电气性能.
- 该研究为未来的研究和开发提供了对材料特征的全面了解.
相关概念视频
Susceptibility, Permittivity and Dielectric Constant
1.4K
When placed in an external electric field, a dielectric material gets polarized. The charge density in the dielectric material is given by the sum of the bound and free charge densities, while the total charge density can also be written in terms of the total electric field. The bound charge density can be measured in terms of polarization, leading to the relationship between electric displacement and polarization.
1.4K
Ionic Crystal Structures
14.1K
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
14.1K
Semiconductors
647
There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...
647


