| 热滞后对溶胶-凝胶法合成氧化铋超微粉的影响 |
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| 引用本文： | 房国丽,陈光,王雄.热滞后对溶胶-凝胶法合成氧化铋超微粉的影响[J].宁夏大学学报(自然科学版),2010,31(3):253-256. |
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| 作者姓名： | 房国丽 陈光 王雄 |
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| 作者单位： | 1. 南京理工大学金属纳米联合实验室,江苏南京,210094;北方民族大学材料科学与工程学院,宁夏银川,750021
2. 南京理工大学金属纳米联合实验室,江苏南京,210094 |
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| 基金项目： | 国家自然科学基金资助项目，江苏省研究生创新计划资助项目 |
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| 摘 要： | 以硝酸铋和柠檬酸为起始反应物,采用溶胶-凝胶法合成了氧化铋超微粉.研究了凝胶煅烧温度和时间对最终产物的成分、结构和形貌的影响.结果表明,由于干凝胶煅烧过程中的热滞后,在500℃煅烧1 h,得到的主要产物为亚稳β-Bi2O3纳米片,平均厚度约为45 nm;500℃煅烧3 h,或600℃煅烧1 h,均得到稳定相-αBi2O3微粉.所得纳米片可能是由于凝胶的模板作用可以有效抑制热解过程中晶粒的长大和团聚而致.
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| 关 键 词： | 溶胶-凝胶法 氧化铋 热滞后 |
Effect of Thermal Hysteresis on Nanostructural Bi2O3 Synthesized by Sol-Gel Method |
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| Fang Guoli,Chen Guang,Wang Xiong.Effect of Thermal Hysteresis on Nanostructural Bi2O3 Synthesized by Sol-Gel Method[J].Journal of Ningxia University(Natural Science Edition),2010,31(3):253-256. |
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| Authors: | Fang Guoli Chen Guang Wang Xiong |
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| Institution: | 1.Joint Laboratory of Nanostructured Materials and Technology,Nanjing University of Science and Technology,Nanjing 210094,China;2.School of Material Science and Engineering,Northern China University for Nationality,Yinchuan 750021,China) |
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| Abstract: | Nanostructural Bismuth oxides have been synthesized via Sol-Gel method,using bismuth nitrate and citric acid as reactants.The component,structure and morphology of the as-obtained products have been studied,which have been annealed at different temperature with different hours.The metastable β-Bi2O3 nanoplates with a thickness of about 45 nm have been obtained by annealing at 500 ℃ for 1 h,which can be attributed to the soft template effect of Gel.While the Gel was annealed at 500 ℃ for 3 h or 600 ℃ for 1 h,the products are stable micron α-Bi2O3 phase. |
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| Keywords: | Sol-Gel method Bismuth oxide thermal hysteresis |
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