谷物生长抑制剂对改性 (Ba,Sr) 的影响 (Sn,Ti) O3用于电热应用
Zhenglyu Li1, Christian Molin1, Sylvia E Gebhardt1
1Fraunhofer Institute for Ceramic Technologies and Systems IKTS, Winterbergstrasse 28, 01277 Dresden, Germany.
Materials (Basel, Switzerland)
|March 13, 2024
概括
这项研究探讨了谷物生长抑制剂和BaSrSnTi氧化物中的改性,以提高电热性质. 在Ba$_{0.62}$Ca$_{0.20}$Sr$_{0.18}$Sn$_{0.065}$Ti$_{0.935}$O$_{3}$ (BCSSnT-20) 组合显示电热制冷设备的承诺.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 热力学是一种热力学.
背景情况:
- 矿材料如Ba$_{x}$Sr$_{1-x}$Ti$_{1-y}$Sn$_{y}$O$_{3}$对于先进的电子应用至关重要.
- 控制微观结构是优化介电,铁电和电热性能的关键.
- 电热 (EC) 冷却提供了一个有前途的固态冷却技术.
研究的目的:
- 研究谷物生长抑制剂 (MgO,Y$_{2}$O$_{3}$,MnCO$_{3}$) 和Ca修饰对BSSnT陶的影响.
- 优化Ba$_{0.62}$Ca$_{0.20}$Sr$_{0.18}$Sn$_{0.065}$Ti$_{0.935}$O$_{3}$的微观结构和电热性能 (BCSSnT-20). 这是一个非常好的方法.
- 确定烧结温度和时间对BCSSnT-20属性的影响.
主要方法:
- 用各种添加剂合成和描述Ba$_{0.82}$Sr$_{0.18}$Sn$_{0.065}$Ti$_{0.935}$O$_{3}$ (BSSnT) 的方法.
- 修改BSSnT和BCSSnT-20陶的微结构分析 (颗粒大小,同质性).
- 在不同电场和温度下测量介电,铁电和电热 (EC) 性能.
主要成果:
- 添加剂MgO,Y$_{2}$O$_{3}$和MnCO$_{3}$显著降低了BSSnT的颗粒大小至1μm以下.
- BCSSnT-20 呈现出细粒度微观结构 (1.5 微米) 和在 40 摄氏度时最大 EC 温度变化为 0.49 K.
- 为BCSSnT-20优化烧结温度增加了颗粒大小和EC温度变化,在20°C时达到0.37K (2V/μm).
结论:
- 在BSSnT陶中增强电热效应,Ca修饰和受控的微观结构至关重要.
- BCSSnT-20显示出在EC冷却的多层陶 (MLC) 组件中应用的巨大潜力.
- 进一步优化烧结参数可以提高BCSSnT-20的电热性能,用于实际的冷却设备.
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