钡改性钽酸铅镁- l的介电、压电和热释电性质

S. Choi, J. W. Jung
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引用次数: 0

摘要

摘要:研究了弛豫铁电体的介电、压电和热释电性质。65年出版广播公司. .研究了Ba, (Mg1, 3ta2,3)03-0, 35PbTi03固溶体系列。测定了陶瓷样品的介电常数和损耗。采用静态Byer-Roundy法测量了不同成分ba掺杂PMT-PT陶瓷的压电d33常数和机电耦合系数,并测量了热释电系数和自发极化随温度的变化规律。掺ba的PMT-PT陶瓷的介电常数、机电耦合系数和热释电系数比未掺ba的PMT-PT陶瓷大得多。Ba掺杂也使Tc下降,Ea的添加量约为6′C/mol%。进一步添加Ba可以使Tc下降,而不会显著改变介电行为。
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Dielectric, Piezoelectric, and Pyroelectric Properties of Barium-Modified Lead Magnesium Tantalate-L
46stract Dielectric, piezoelectric and pyroelectric properties of relaxor ferroelectrics in the 0. 65Pbl..Ba, (Mg1,3Ta2,3)03-0, 35PbTi03 solid solution series have been investigated. The dielectric constant and loss of ceramic samples were determined. The piezoelectric d33 constant and electromechanical coupling factor were measured for various compositions in the Ba-doping PMT-PT ceramics, The pyroelectric coefficient and spontaneous polarization were measured by the static Byer-Roundy method as a function of temperature. The values of dielectric constant, electromechanical coupling factor and pyroelectric coefficient for Ba-doped PMT-PT are much larger compared to the values observed for the undoped PMT-PT ceramics. Ba-doping also shifted the Tc downward, approximately 6 ‘C/mol% additon of Ea. Further additions of Ba could be used to shift the Tc downward without significantly changing the dielectric behav i or.
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