| 量子顺电体La1/2Na1/2TiO3纳米晶的制备与谱学表征 |
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| 作者单位： | ：张伟风 张兴堂 郭 虹 (河南大学物理系,
开封, 475001) |
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| 摘 要： | 用改进硬脂酸溶胶-凝胶法制备了量子顺电体La
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| 关 键 词： | La |
| 修稿时间： | : 1998-04- |
Preparation and Characterization of Quantum ParaelectricLa1/2Na1/2TiO3
Nanocrystals |
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| Abstract: | Quantum paraelectric La1/2Na1/2TiO3
nanocrystals have successfully been prepared by using improved sol-gel method in which
absolute alcohol and stearic acid were used as the solvent. X-ray diffraction results show
that the as-prepared sample is a pure La1/2Na1/2TiO3 with
an acubic perovskite-type structure. The mean crystallite sizes were controlled by varying
annealing temperatures. FTIR and Raman measurements reveal nano-size effects on the
vibration spectroscopic properties of the nanocrystalline La1/2Na1/2TiO3. |
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| Keywords: | La |
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