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首页> 外文期刊>Journal of Advanced Ceramics >Theoretical investigations on electrocaloric properties of (111)-oriented PbMgSubscript1/3/SubscriptNbSubscript2/3/SubscriptOSubscript3/Subscript single crystal
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Theoretical investigations on electrocaloric properties of (111)-oriented PbMgSubscript1/3/SubscriptNbSubscript2/3/SubscriptOSubscript3/Subscript single crystal

机译:(111)取向PbMg 1/3 Nb 2/3 O 3 单晶的电热性能的理论研究

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摘要

The electrocaloric (EC) effect accompanied with the ferroelectric to paraelectric phase transition in (111)-oriented PbMg1/3Nb2/3O3 (PMN) is investigated. It is shown that the largest change ΔT is 0.37 K in 3 kV/cm electric field shift near the Curie temperature of 221 K; that is, the cooling ΔT per unit field (MV/m) is 1.23×10?6 m·K/V. This value is significantly larger, and comparable with the value of 0.254×10?6 m·K/V for PbZr0.95Ti0.05O3 thin film under larger electric field shift ΔE = 30 kV/cm. Thus, the EC effect of (111) PMN single crystal provides cooling solutions at low temperatures, and opens more opportunities for practical application in cooling systems.
机译:研究了在(111)取向的PbMg1 / 3Nb2 / 3O3(PMN)中伴随着铁电到顺电相变的电热(EC)效应。结果表明,在居里温度221 K附近,在3 kV / cm的电场偏移中,最大变化ΔT为0.37 K;在207 K居里温度附近,最大变化ΔT为0.37K。即,每单位场的冷却ΔT(MV / m)为1.23×10-6m·K / V。该值明显更大,并且在较大的电场偏移ΔE= 30 kV / cm时与PbZr0.95Ti0.05O3薄膜的0.254×10?6 m·K / V相当。因此,(111)PMN单晶的EC效应在低温下提供了冷却解决方案,并为在冷却系统中的实际应用提供了更多机会。

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