| Evaluation of Morphology—Stable Critical Size of KNbO3 Crystals |
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| 引用本文： | Xin＇an LIANG.Evaluation of Morphology—Stable Critical Size of KNbO3 Crystals[J].材料科学技术学报,2002,18(1):95-96. |
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| 作者姓名： | Xin＇an LIANG |
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| 作者单位： | ShanghaiInstituteofCeramics,ChineseAcademyofSciences,Shanghai200050,China |
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| 基金项目： | the foundation for key research project of microgravity science from the State Science and Technology Commission of China，国家自然科学基金 |
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| 摘 要： | Skeletal form of KnbO3 crystals growing in Li2B4O7 solvent was in-situ observed at 900℃ and it was found that shallow depression started to develop on the surface of KnbO3 crystals when the crystal size exceeded several micron,typically 7 micron.Based on the quantitative criterion derived by Chernov,the estimated critical size of KNbO3 crystals was 1 micron,which was consistent with the experimental measurement.The kinetic coefficients,Kcorner and Kcr,in the criterion were experimentally obtained in the diffusive-convective and diffusive-advective flow states respectively.
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| 关 键 词： | 铌酸钾晶体 硼酸锂 结构 晶体尺寸 组织 KNbO3 |
Evaluation of Morphology-Stable Critical Size of KNbO3 Crystals |
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| Lixia CAI,Weiqing JIN,Zhilei PAN,Xin''an LIANG,Shinichi Yoda.Evaluation of Morphology-Stable Critical Size of KNbO3 Crystals[J].Journal of Materials Science & Technology,2002,18(1):95-96. |
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| Authors: | Lixia CAI Weiqing JIN Zhilei PAN Xin'an LIANG Shinichi Yoda |
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| Affiliation: | Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China... |
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| Abstract: | Skeletal form of KNbO3 crystals growing in Li2B4O7 solvent was in-situ observed at 900C and it was found thatshallow depression started to develop on the surface of KNbO3 crystals when the crystal size exceeded several micron,typically 7 micron. Based on the quantitative criterion derived by Chernov, the estimated critical size of KNbO3crystals was 1 micron, which was consistent with the experimental measurement. The kinetic coefficients, kc erand kc,, in the criterion were experimentally obtained in the diffusive-convective and diffusive-advective flow statesrespectively. |
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| Keywords: | Morphology instability KNbO3 In-situ observation Electron microprobe analyses |
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