Raman Spectroscopy Studies of Nanocrystalline Lead Zirconate Titanate as Functions of High Pressure
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摘要: 作为重要的铁电陶瓷材料之一,PbZr0.52Ti0.48O3(PZT)陶瓷因其广泛的工业应用而成为研究的焦点。通过水溶的溶胶-凝胶法,合成了PbZr0.52Ti0.48O3陶瓷片。通过拉曼光谱测试技术结合高压实验,系统地研究了PZT(MPB-PZT:PbZr0.52Ti0.48O3)陶瓷在不同压力下的拉曼光谱。拉曼光谱实验结果分析表明,在0~25 GPa的压力范围内,随着静水压力的增加,在压力为2.61 GPa时, PZT陶瓷发生了从三方-四方混合相到四方-立方混合相的结构相变,随着压力继续增大到8.5 GPa,PZT陶瓷完全相变为顺电立方相。同时,对PZT陶瓷片的介电常数进行了测试,确定PZT陶瓷片的居里温度为395 ℃。
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关键词:
- 高压 /
- 拉曼光谱 /
- PbZr0.52Ti0.48O3 /
- 相变
Abstract: As one of the most important ferroelectric ceramic materials, PbZr0.52Ti0.48O3 (PZT) ceramic has been widely studied because of its extensive industrial application.We prepared the PZT ceramic using a simple water-based sol-gel method, and studied its Raman spectra as a function of high pressure.Raman spectroscopy analysis show that the phase transition pressure from rhombohedral-tetragonal (R+T) to tetragonal-cubic (T+C) phases is 2.61 GPa and the pressure for T+C to C phase is 8.5 GPa.We also measured the dielectric constant of the PZT ceramic, the result suggests that the Curie temperature of the PZT ceramic is 395 ℃.-
Key words:
- high-pressure /
- Raman spectrum /
- PbZr0.52Ti0.48O3 /
- phase transition
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