| Nd-doped barium titanate ceramics with various Ti/Ba ratios prepared by sol-gel method |
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| 引用本文： | SHI Qizhen,CUI Bin,WANG Hui,TIAN Jing,CHANG Zhuguo & HOU Yudong Department of Chemistry,Northwest University,Shaanxi Key Laboratory of Physico-lnorganic Chemistry,Xi''''an 710069,China, Key Laboratory of Advanced Functional Materials of China Education Ministry,Beijing University of Technology,Beijing 100022,China. Nd-doped barium titanate ceramics with various Ti/Ba ratios prepared by sol-gel method[J]. 中国科学B辑(英文版), 2005, 48(Z1) |
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| 作者姓名： | SHI Qizhen CUI Bin WANG Hui TIAN Jing CHANG Zhuguo & HOU Yudong Department of Chemistry Northwest University Shaanxi Key Laboratory of Physico-lnorganic Chemistry Xi''''an 710069 China Key Laboratory of Advanced Functional Materials of China Education Ministry Beijing University of Technology Beijing 100022 China |
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| 作者单位： | SHI Qizhen，CUI Bin，WANG Hui，TIAN Jing，CHANG Zhuguo & HOU Yudong Department of Chemistry，Northwest University，Shaanxi Key Laboratory of Physico-lnorganic Chemistry，Xi'an 710069，China; Key Laboratory of Advanced Functional Materials of China Education Ministry，Beijing University of Technology，Beijing 100022，China |
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| 摘 要： | The Nd-doped BaTiO3 nanocrystalline powders and ceramics with different Ti/Ba ratios were prepared by sol-gel method. Phases and microstructures of the Nd-doped BaTiO3 based powders and ceramics were characterized by XRD, SEM and TEM methods. The results revealed that the powders synthesized by sol-gel method were nanometer scale (30-60 nm) and were mainly composed of cubic BaTiO3 with a small amount of BaCO3. After sintering at high temperature, both cubic BaTiO3 and BaCO3 were transformed into tetrahedron BaTiO3 phase. The dielectric properties of the ceramics were also determined and the influence of Ti/Ba ratio on the dielectric properties was discussed. The Tc did not change with the variation of Ti/Ba ratio, while theεmax increased firstly and then decreased. The excess TiO2 is benefit for the modification of ceramics' microstructure and dielectric properties.
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Nd-doped barium titanate ceramics with various Ti/Ba ratios prepared by sol-gel method |
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| SHI Qizhen,CUI Bin,WANG Hui,TIAN Jing,CHANG Zhuguo,HOU Yudong. Nd-doped barium titanate ceramics with various Ti/Ba ratios prepared by sol-gel method[J]. Science in China(Chemistry), 2005, 48(Z1) |
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| Authors: | SHI Qizhen CUI Bin WANG Hui TIAN Jing CHANG Zhuguo HOU Yudong |
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| Affiliation: | 1. Department of Chemistry, Northwest University, Shaanxi Key Laboratory of Physico-Inorganic Chemistry, Xi'an 710069, China
2. Key Laboratory of Advanced Functional Materials of China Education Ministry, Beijing University of Technology, Beijing 100022, China |
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| Abstract: | The Nd-doped BaTiO3 nanocrystalline powders and ceramics with different Ti/Ba ratios were prepared by sol-gel method. Phases and microstructures of the Nd-doped BaTiO3based powders and ceramics were characterized by XRD, SEM and TEM methods. The results revealed that the powders synthesized by sol-gel method were nanometer scale (30-60 nm)and were mainly composed of cubic BaTiO3 with a small amount of BaCO3. After sintering at high temperature, both cubic BaTiO3 and BaCO3 were transformed into tetrahedron BaTiO3 phase.The dielectric properties of the ceramics were also determined and the influence of Ti/Ba ratio on the dielectric properties was discussed. The Tc did not change with the variation of Ti/Ba ratio,while the εmax increased firstly and then decreased. The excess TiO2 is benefit for the modification of ceramics' microstructure and dielectric properties. |
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| Keywords: | sol-gel method dielectric properties nanometer materials Nd-doped barium titanate Ti/Ba mole ratio |
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