A High Frequency Hydrostatic Pressure Dielectricity Measuring System Based on Cubic Anvil Apparatus
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摘要: 以一套614 400 kN六面顶高压装置和一台Agilent 4294A精密阻抗分析仪为主体，建立了一套静水压高频介电实时测试系统。通过固体传压介质预成型方法，解决了液体测试腔在固体传压介质中的密封以及包括4根微同轴电缆在内的多根测量导线引出密封边问题，将常压下通用的四同轴阻抗谱测试技术引入了高压研究。液体测试腔容积可达(1315) mm3，可同时容纳10 mm10 mm样品、高频测试夹具、温度与压力传感器、加热装置，以及包括4根外径为1.6 mm、特性阻抗为50 微同轴电缆在内的16根引线，进行室温至300 ℃、常压至3 GPa 静水压力、测试频率40 Hz~5 MHz范围材料的四线阻抗谱测量，实验误差小于3%。利用这套装置观察了室温下，BaTiO3单晶在约2.6 GPa静水压力下的压致铁电-顺电相变。Abstract: By a self-made system based on a cubic anvil high-pressure apparatus and an Agilent 4294A accurate impedance analyzer, real time high frequency dielectricity measurement under hydrostatic pressure is realized by the standard four-wire method widely used in ambient pressure dielectric research. The sealing of liquid cell in solid pressure-transmission medium and multi signal lines out through gaskets including four micro-coaxial cables is achieved by the pre-formation of pyrophyllite cube together with gaskets. The testing fixture, 10 mm10 mm sample, pressure-temperature sensors and as many as 16 signal wires including 4 micro-coaxial cables with an outer diameters of 1.6 mm respectively can be contained simultaneously in a liquid testing cell with a volume of (1315) mm3. Four-wire impedance spectroscopy can be obtained by this system in a measurement range of room temperature to 300 ℃, ambient pressure to about 3 GPa hydrostatic pressure and testing frequency from 40 Hz to 5 MHz with an experiment error below 3%. The pressure induced ferroelectric-paraelectric phase transition of a BaTiO3 single crystal is observed using this setting up.
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Key words:
- BaTiO3 /
- hydrostatic pressure /
- four-wire method
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Samara G A. Pressure-Induced Crossover from Long-to Short-Range Order in Compositionally Disordered Soft Mode Ferroelectrics [J]. Phys Rev Lett, 1996, 77: 314-317. Samara G A, Venturini E L, Hugo S V. Pressure-Induced Crossover from Long-to-Short-Range Order in [Pb(Zn1/3Nb2/3)O3]0. 905(PbTiO3)0. 095 Single Crystal [J]. Appl Phys Lett, 2000, 76: 1327-1329. Samara G A, Venturini E L, Hugo S V. Dielectric Properties and Phase Transitions of [Pb(Zn1/3Nb2/3)O3]0. 905(PbTiO3)0. 095: Influence of Pressure [J]. Phys Rev B, 2001, 63: 184104-184115. Yasuda N, Ohwa H, Oohashi J, et al. Pressure-Induced Dielectric Change from Relaxor to Antiferroelectric Behavior in Disordered Pb(In1/2Nb1/2)O3 [J]. J Phys Soc Jpn, 1997, 66: 1920-1923. Yasuda N, Ohwa H, Oohashi J, et al. The Temperature and Pressure Dependence of the Dielectric Properties of Disordered and Ordered Pb(In1/2Nb1/2)O3 Single Crystals [J]. J Phys Soc Jpn, 1998, 67: 3952-3957. Nomura K, Shingai T, Yasuda N, et al. Pressure-Induced Structural Phase Transition from Relaxor Phase to Antiferroelectric Phase in Disordered Pb(In1/2Nb1/2)O3 [J]. J Phys Soc Jpn, 1999, 68: 866-870. Samara G A. Pressure and Temperature Dependences of the Dielectric Properties of the Perovskites BaTiO3 and SrTiO3 [J]. Phys Rev, 1966, 151: 378-386. Decker D L, Zhao Y X. Dielectric and Polarization Measurements on BaTiO3 at High Pressures to the Tricritical Point [J]. Phys Rev B, 1989, 39: 2432-2438. Ishidate T, Abe S, Takahashi H, et al. Phase Diagram of BaTiO3 [J]. Phys Rev Lett, 1997, 78: 2397-2400. Samara G A. Pressure as a Probe of the Glassy Properties of Compositionally Disordered Soft Mode Ferroelectrics: (Pb0. 82La0. 12)(Zr0. 40Ti0. 60)O3(PLZT 12/40/60) [J]. J Appl Phys, 1998, 84: 2538-2545. -
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