Mn 2+掺杂无铅Ba(ZrTi) o3陶瓷中增强热效应的直接测量

EnergyRN: Electrochemical Energy Engineering (EnergyRN) (Topic) Pub Date : 1900-01-01 DOI:10.2139/ssrn.3441990

Hao-Xuan Li, Xiaodong Jian, X. Niu, Yingbang Yao, T. Tao, B. Liang, Shengguo Lu

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引用次数: 2

摘要

采用氧化反应法制备了x= 0.15、0.20和y=0、0.0025、0.0050、0.0075、0.0100、0.0250、0.0500掺杂锰的锆钛酸钡陶瓷(Ba(ZrxMnyTi1-x-y)O3-BZMT)。直接测量了绝热温度变化。结果表明，将非等效Mn2+离子浓度调节在0.25% ~ 0.75%范围内，可获得高介电常数和低损耗的理想介电性能。极化率随掺杂Mn2+含量的增加而增加。Ba(Zr0.15Mn0.0025Ti0.8475)O3陶瓷在62℃时的最大电热温度变化为2.35 K，温度变化范围为~ 40℃。

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Direct Measurement of Enhanced Electrocaloric Effect in Mn 2+ Doped Lead-Free Ba(ZrTi)O 3 Ceramics

The manganese doped barium zirconate titanate ceramics (Ba(Zr_xMnyTi_1-x-y)O₃-BZMT) ceramics with x= 0.15, 0.20 and y=0, 0.0025, 0.0050, 0.0075, 0.0100, 0.0250, 0.0500 were prepared using an oxide reaction approach. The adiabatic temperature change was measured directly. Results revealed that by adjusting the nonequivalent Mn²⁺ ionic concentration within 0.25% to 0.75%, desired dielectric performances with high permittivities and lower losses were obtained. The polarization was increased with the doping content of Mn²⁺ ions. The largest electrocaloric temperature change obtained is 2.35 K for Ba(Zr_0.15Mn_0.0025Ti_0.8475)O₃ ceramics at 62°C, and a broad temperature range of ~ 40°C was accompanied.

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EnergyRN: Electrochemical Energy Engineering (EnergyRN) (Topic)

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