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在PbHfO3中将换成:SnHfO3的非立方结构
Eric A Gabilondo1, Ryan J Newell2, Rachel Broughton2
1Department of Chemistry, North Carolina State University, Raleigh, NC 27695-8204, USA.
研究人员成功地通过在300°C时在哈夫酸盐 (PbHfO3) 中替换来合成哈夫酸盐 (SnHfO3). 这种无的矿材料显示出新陶的潜力.
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:
- 越来越多的立法压力需要从商业氧化物压陶中去除.
- 锡矿氧化物是有希望的替代品,因为它们预测的高极化和异电子替代能力.
- 以前试图合成Sn (II) - 矿氧化物的尝试因其固有的转移稳定性而受到阻碍.
研究的目的:
- 为了实现首次在氧化物中将完全替代 (II).
- 探索一种新的"无化"策略,用于制造无压陶.
- 研究合成的哈夫酸盐的结构和潜在极性质.
主要方法:
- 在300°C时,哈夫酸盐 (PbHfO3) 与SnClF的拓变异.
- 使用X射线衍射,电子衍射,元素分析和119Sn Mössbauer光谱学进行了表征.
- 在现场进行衍射研究,观察相变.
主要成果:
- 通过完整的Sn (II) -for-Pb (II) 替代,成功合成了高纯度,结晶的锡哈夫酸盐 (SnHfO3) 与Pbam对称性.
- 通过各种分析技术确认晶体结构和成功替代.
- 在大约130-200°C之间观察到SnHfO3的可逆相变,这表明铁电的潜力.
结论:
- 开发的"脱"方法为合成无氧化物提供了一条可行的途径.
- 甲酸 (SnHfO3) 是未来无压陶应用的一个有希望的材料.
- 这项工作为探索新的极性和反极性锡氧化物材料开辟了道路.
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