Nonlinear-optic and ferroelectric behavior of lithium borate-strontium bismuth tantalate glass-ceramic composite
Nonlinear-optic and ferroelectric behavior of lithium borate-strontium bismuth tantalate glass-ceramic composite
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DOI：
10.1063/1.1380237
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发表时间：
2001-06-18
影响因子：
4
通讯作者：
Komatsu, T
中科院分区：
文献类型：
--
作者：
Murugan, GS;Varma, KBR;Komatsu, T
通过溅射淬火技术制备了（100-x）Li_2B_4O_7-xSrBi（2）Ta（2）O（9）（0 ≤ tox ≤ 20）系统的透明玻璃。通过差热分析建立了淬火样品的玻璃态性质。X射线粉末衍射和透射电子显微镜研究证实了热处理（玻璃陶瓷）样品中的淬火和结晶度（40 nm）的无定形性质。在300 K、100 Hz ~ 40 MHz频率范围内，玻璃陶瓷复合材料（x=20，热处理温度为773 K/8 h）的介电常数（ε（r））介于母体玻璃（Li 2B 4 O 7）和钽酸锶铋陶瓷之间。在300 K时，这些材料表现出强烈的二次谐波产生和铁电滞后行为（P vs E环）。矫顽场（E-c）和剩余极化（P-r）分别为1053 V/cm和0.483 μ C/cm（2）。(C)2001年美国物理学会。
Transparent glasses in the system (100-x) Li2B4O7-xSrBi(2)Ta(2)O(9) (0 less than or equal tox less than or equal to 20) were fabricated via a splat-quenching technique. The glassy nature of the as-quenched samples was established by differential thermal analyses. X-ray powder diffraction and transmission electron microscopic studies confirmed the amorphous nature of the as-quenched and crystallinity (40 nm) in the heat-treated (glass-ceramic) samples. The dielectric constant (epsilon (r)) of the glass-ceramic composite (x=20, heat treated at 773 K/8 h) was in between that of the parent host glass (Li2B4O7) and strontium bismuth tantalate ceramics in the frequency range 100 Hz-40 MHz at 300 K. These exhibited intense second-harmonic generation and a ferroelectric hysteritic behavior (P vs E loops) at 300 K. The coercive field (E-c) and the remnant polarization (P-r) were 1053 V/cm and 0.483 muC/cm(2), respectively. (C) 2001 American Institute of Physics.