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Crystals 2018, 8(1), 34; https://doi.org/10.3390/cryst8010034

Temperature Dependence of the Thermal, Electrical Resistivity, Dielectric and Piezoelectric Properties of CaYAl3O7 Crystal

State Key Laboratory of Crystal Materials & Key Laboratory of Functional Crystal Materials and Device, Shandong University, Jinan 250100, China
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Received: 13 December 2017 / Revised: 3 January 2018 / Accepted: 10 January 2018 / Published: 17 January 2018
(This article belongs to the Special Issue Crystal Growth for Optoelectronic and Piezoelectric Applications)
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Abstract

Calcium yttrium aluminate (CaYAl3O7) crystal was grown and characterized in detail for high temperature piezoelectric sensors for the first time. The thermal properties of the CaYAl3O7 (CYAM) crystal were investigated systematically. In particular, the CYAM crystal exhibits considerably high resistivity along X- and Z- direction in the order of 6.96 × 107 Ω·cm and 2.86 × 108 Ω·cm at 600 °C, respectively. The temperature dependence of the electromechanical properties of CYAM crystal were investigated over the temperature range of 25–500 °C. The high thermal stability of piezoelectric properties together with its high electrical resistivity, makes CaYAl3O7 crystal a promising candidate for high temperature piezoelectric applications. View Full-Text
Keywords: piezoelectric materials; melilite crystals; high temperature applications piezoelectric materials; melilite crystals; high temperature applications
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Li, Y.; Jia, Z.; Yin, Y.; Hu, Q.; Mu, W.; Zhang, J.; Yu, X.; Tao, X. Temperature Dependence of the Thermal, Electrical Resistivity, Dielectric and Piezoelectric Properties of CaYAl3O7 Crystal. Crystals 2018, 8, 34.

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