Investigation of the dielectric and piezoelectric properties of ReCa4O(BO3)3 crystals
Investigation of the dielectric and piezoelectric properties of ReCa4O(BO3)3 crystals
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DOI：
10.1088/0022-3727/44/13/135405
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发表时间：
2011-04
期刊：
影响因子：
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通讯作者：
F. Yu;Shujun Zhang;Xian Zhao;Shiyi Guo;X. Duan;D. Yuan;T. Shrout
中科院分区：
文献类型：
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作者：
F. Yu;Shujun Zhang;Xian Zhao;Shiyi Guo;X. Duan;D. Yuan;T. Shrout
用提拉法成功地生长了ErCOB、SmCOB、PrCOB和LaCoB四种稀土结构的ReCa4O(BO3)3(ReCOB，Re：稀土)晶体。介电常数分别为ErCOB和SmCOB，PrCOB和LaCoB。结果表明，ErCoB、SmCOB、PrCOB和LaCoB晶体的机电耦合系数k26和压电系数d26分别为18.5%(7.6pC N−1)、27.0%(12.7pC N−1)、31.5%(15.8pC N−1)和25.0%(11.8pC N−1)。研究了Re~(3+)离子半径对介电和压电性能的影响，由于Pr3+和Ca~(2+)离子半径相近，PrCOB晶体的介电和压电性能最高。探索了ReCOB晶体的结构与介电/压电性能之间的关系，以进一步优化ReCOB系列晶体的介电和压电性能。
Piezoelectric ReCa4O(BO3)3 (ReCOB, Re: rare earth) crystals, including ErCOB, SmCOB, PrCOB and LaCOB, were successfully grown by the Czochralski (Cz) method. The dielectric constants were determined to be , and for ErCOB, , and for SmCOB, , and for PrCOB, , and for LaCOB, respectively. The electromechanical coupling factors k26 and piezoelectric coefficients d26 were found to be 18.5% (7.6 pC N−1), 27.0% (12.7 pC N−1), 31.5% (15.8 pC N−1) and 25.0% (11.8 pC N−1) for ErCOB, SmCOB, PrCOB and LaCOB crystals, respectively. The dielectric and piezoelectric properties as a function of Re3+ ion radius were studied, with maximum values being observed in the PrCOB crystals, due to the similar ion radius of Pr3+ and Ca2+. The relationship between the structure and dielectric/piezoelectric properties of ReCOB crystals was explored, to further optimize the dielectric and piezoelectric properties in ReCOB series crystals.