DIELECTRIC AND PIEZOELECTRIC PROPERTIES OF 0.91PB(ZN1/3NB2/3)O3-0.09PBTIO3 SINGLE-CRYSTALS
DIELECTRIC AND PIEZOELECTRIC PROPERTIES OF 0.91PB(ZN1/3NB2/3)O3-0.09PBTIO3 SINGLE-CRYSTALS
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DOI：
10.1143/jjap.21.1298
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发表时间：
1982-01-01
期刊：
影响因子：
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通讯作者：
NOMURA, S
中科院分区：
文献类型：
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作者：
KUWATA, J;UCHINO, K;NOMURA, S
研究了0.91 (PbZn 1/3 Nb 2/3) o3 - 0.09 pbtio3单晶的介电、压电和弹性性能随温度和外加电场的变化规律。在68℃和178℃时，观察到晶体从菱形铁电相到四方铁电相再到立方准电相的两个多相转变。这两种跃迁都是一阶的，但都有轻微的扩散。介电常数、压电常数和弹性常数在较低的过渡点显著增加。特别是，沿拟立方[001]轴极化的样品在室温下显示出异常大的压电和机电耦合常数（d [001]//= 1500× 10-12 C/N, k[001]//= 0.92）。
The dielectric, piezoelectric and elastic properties of 0.91 (PbZn 1/3 Nb 2/3) O 3–0.09 PbTiO 3 single crystals have been investigated as functions of temperature and applied electric field. Two multiple phase transitions at 68 C and 178 C, the crystal changing from the rhombohedral ferroelectric phase to tetragonal ferroelectric and then to cubic paraelectric, have been observed. Both the transitions are of first-order, but both are slightly diffused. Significant increases in the dielectric, piezoelectric and elastic constants are observed at the lower transition point. In particular, the sample poled along the pseudo-cubic [001] axis reveals anomalously large piezoelectric and electro-mechanical coupling constants at room temperature in the rhombohedral phase (d [001]//= 1500× 10-12 C/N, k [001]//= 0.92).