| Effects of Temperature Raising Speed on the Growth of BN Crystals in Hydrothermal Solutions |
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| 作者姓名： | 于美燕 李凯 崔得良 董守义 王琪珑 蒋民华 |
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| 作者单位： | [1]SchoolofChemistry＆ChemicalEngineering,ShandongUniversity,Jinan,Shandong250100,China [2]StateKeyLabofCrystalMaterials,ShandongUniversity,Jinan,Shandong250100,China |
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| 基金项目： | Project supported by the Natural Science Foundation of China (Nos. 50272036，90101016 and 90206042)，the Natural Science Foundation of Shan-dong Province and the Foundation of Doctorate Education Discipline by the Ministry of Education of China. |
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| 摘 要： | Cubic boron nitride (cBN) and orthorhombic boron nitride (oBN) crystals have been prepared in hydrothermal solutions by reacting H3BO3 NaN3 P and H3BO3 NaN3 N2H4 respectively. The experimental results indicated that, if the temperature was increased rapidly, both the yield and perfectness of BN crystals became poor. On the contrast, the yield and perfectness of BN crystals can be improved very much by slowly increasing the temperature of the reaction mixture. The results of X-ray powder diffraction (XRD), Fourier transform infrared spectrum (FTIR) and high resolution transmission electron microscopy (HRTEM) proved that the samples were composed of oBN and cBN.
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| 关 键 词： | 立方晶 斜方晶 硼氮化物 水热法 X射线衍射 傅立叶变换红外光谱 |
Effects of Temperature Raising Speed on the Growth of BN Crystals in Hydrothermal Solutions |
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| YU,Mei-Yana LI,Kaib.Effects of Temperature Raising Speed on the Growth of BN Crystals in Hydrothermal Solutions[J].Chinese Journal of Chemistry,2004,22(6):528-532. |
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| Authors: | YU Mei-Yana LI Kaib |
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| Abstract: | Cubic boron nitride (cBN) and orthorhombic boron nitride (oBN) crystals have been prepared in hydrothermal solutions by reacting H3BO3+NaN3+P and H3BO3+NaN3+N2H4 respectively. The experimental results indicated that, if the temperature was increased rapidly, both the yield and perfectness of BN crystals became poor. On the contrast, the yield and perfectness of BN crystals can be improved very much by slowly increasing the temperature of the reaction mixture. The results of X-ray powder diffraction (XRD), Fourier transform infrared spectrum (FTIR) and high resolution transmission electron microscopy (HRTEM) proved that the samples were composed of oBN and cBN. |
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| Keywords: | boron nitride hydrothermal solution reaction coupling effect |
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