Growth and Electric Properties of Relaxor Ferroelectric Single Crystal PZNT93/7

Abstract

Abstract: Relaxor ferroelectric single crystal Pb[(Zn_1/3Nb_2/3)_0.93Ti_0.07]O₃ (PZNT93/7) was grown by a flux-Bridgman method using 50mol% PbO as the flux. Nucleation
was modified by O₂ gas cooling system at the bottom of Pt crucible. The size of the crucible was 40mm×40mm×300mm. The rate of pulling-down
was 0.5mm/h and the rate of oxygen fluid was 1～1.6L/min. The maximum size of the obtained crystals was φ30mm×25mm. The as-grown PZNT crystal exhibits
an obvious growth morphology and the largest revealed face is (001) determined by X-ray diffraction. Due to unstability of O₂ fluid and slow mass transport,
red PbO inclusions are easily formed in the crystal. The measurements of dielectric and ferroelectric properties show that the crystal can satisfy the requirements
of array-type transducers in a new type of medical diagnostic equipment.

Key words: PZNT, relaxor ferroelectric single crystal, flux-Bridgman method, crystal growth, PbO flux

CLC Number:

O782

XU Jia-Yue,TONG Jian,SHI Min-Li,LU Bao-Liang,ZHANG Ai-Qiong,FAN Shi-Ji. Growth and Electric Properties of Relaxor Ferroelectric Single Crystal PZNT93/7[J]. Journal of Inorganic Materials.

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Growth and Electric Properties of Relaxor Ferroelectric Single Crystal PZNT93/7

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