一个位置,两个,三个环境:s2和s0电子配置在矿氧化物中产生无Pb的放松行为
T Wesley Surta1, Thomas A Whittle1, Matthew A Wright1
1Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, U.K.
Journal of the American Chemical Society
|January 14, 2021
概括
研究人员开发了一种无放松剂材料 - - 甲酸 (KBMN),为高性能压电器提供了一条新途径. 这一发现为陶的环保替代品铺平了道路.
科学领域:
- 材料科学
- 固态化学
- 凝聚物质物理学
背景情况:
- 由于其特殊的性能,压电器通常使用基氧化物.
- 酸 (PMN) 是一种放松剂材料,尽管具有中心对称性,但具有理想的功能特性.
- 开发无替代品对于环境和健康至关重要.
研究的目的:
- 引入一种新的无放松剂材料, (K1/2Bi1/2)
- 研究KBMN的结构和介电性质.
- 探索KBMN作为无压电陶的基础的潜力.
主要方法:
- 无放松剂KBMN的合成和表征
- 分析晶体结构和阴离子排序的衍射方法.
- 介电和热测量以了解功能性质.
- 用 (K1/2Bi1/2) TiO3 形成固体溶液以研究相位过渡.
主要成果:
- 无放松剂KBMN已成功合成和表征.
- 分散研究揭示了K+和Bi3+在A位点的不同结构作用.
- 由于其特定的离子排列,KBMN表现出独特的热和介电行为.
- 在KBMN- ((K1/2Bi1/2) TiO3固体溶液中观察到形态相界,类似于以为基础的系统.
结论:
- KBMN是用于压电应用的有前途的无放松材料.
- 了解KBMN中的结构属性关系可以进行有针对性的化学修改以提高性能.
- 这项工作为开发高性能,对环境无害的压电材料开辟了新的道路.
相关概念视频
Molecular Orbital Theory II
24.4K
Molecular Orbital Energy Diagrams
24.4K
Valence Bond Theory
10.2K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
10.2K
VSEPR Theory and the Effect of Lone Pairs
50.2K
Effect of Lone Pairs of Electrons on Molecule Geometry
50.2K
Hybridization of Atomic Orbitals I
59.6K
The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
59.6K
Hybridization of Atomic Orbitals II
43.1K
sp3d and sp3d 2 Hybridization
43.1K
Valence Bond Theory and Hybridized Orbitals
25.3K
According to valence bond theory, a covalent bond results when: (1) an orbital on one atom overlaps an orbital on a second atom, and (2) the single electrons in each orbital combine to form an electron pair. The strength of a covalent bond depends on the extent of overlap of the orbitals involved. Maximum overlap is possible when the orbitals overlap on a direct line between the two nuclei.
A σ bond (single bond in a Lewis structure) is a covalent bond in which the electron density is...
A σ bond (single bond in a Lewis structure) is a covalent bond in which the electron density is...
25.3K


