阶段结构,结合特征和Ruddlesden-Popper型Sr2TiO4陶的微波介电特性
Jun Yang1,2, Jinbiao Pang2, Xiaofang Luo3
1School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China.
Materials (Basel, Switzerland)
|July 29, 2023
概括
酸 (Sr2TiO4) 陶在最佳烧结时表现出优异的微波介电性能. 债券特征显示Sr-O债券影响两极分化,而Ti-O债券则决定结构稳定性和介电损失.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 陶工程 陶工程
背景情况:
- 微波介电材料对于现代电子设备至关重要.
- 酸 (Sr2TiO4) 陶是这些应用的潜在候选者.
- 了解材料特性与性能之间的关系至关重要.
研究的目的:
- 研究Sr2TiO4陶的相构成,粘合特性和微波介电性能.
- 确定影响介电性质的关键因素.
- 为了优化烧结条件以提高性能.
主要方法:
- 在不同温度 (14251525 °C) 下合成Sr2TiO4陶.
- 用X射线衍射 (XRD) 和瑞特维尔德精细化进行相位分析.
- 微结构分析以评估密度和多孔性.
- 微波介电性质测量 (允许度 ε,质量系数 Q × f).
- 使用P-V-L复杂化学键理论计算键特性.
主要成果:
- 合成了纯四角形拉德尔斯登 - 波珀型Sr2TiO4陶.
- 在1475°C的最佳烧结产生了密集的微结构,具有出色的微波介电特性 (ε ≈ 39.41,Q × f ≈ 93.120 GHz).
- 发现Sr-O债券主要决定了介电极化.
- 确定Ti-O键对于结构稳定性,内在介电损失和热膨胀至关重要.
结论:
- 优化烧结条件对于获得高性能Sr2TiO4陶至关重要.
- Sr-O和Ti-O键特性之间的相互作用决定了材料的介电性能.
- Sr2TiO4陶显示出先进微波应用的巨大潜力.
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