| 自蔓延低温燃烧-溶胶凝胶合成Ce0.8Sm0.2O1.9及烧结性能 |
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| 引用本文： | 燕萍,胡筱敏,孙旭东.自蔓延低温燃烧-溶胶凝胶合成Ce0.8Sm0.2O1.9及烧结性能[J].化工学报,2011,62(1):262-268. |
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| 作者姓名： | 燕萍 胡筱敏 孙旭东 |
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| 作者单位： | 1.沈阳化工大学应用化学学院，辽宁 沈阳 110142；2东北大学资源与土木工程学院，辽宁 沈阳 110004；3东北大学材料各向异性与织构教育部重点实验室，辽宁 沈阳 110004 |
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| 摘 要： | 用甘氨酸作还原剂、硝酸盐作氧化剂，采用溶胶-凝胶与自蔓延低温燃烧相结合的方法制备了超细Ce0.8Sm0.2O1.9 (SDC)固溶体，对所合成的粉体分别采用XRD、SEM和BET法进行了表征。结果表明，600℃焙烧产物是具有较高相纯度的单一立方相萤石型结构固溶体，根据XRD估算晶粒度为13～30 nm。甘氨酸与金属硝酸盐(G/N)摩尔比对粉体的微观形貌和烧结性能有很大影响， 当G/N关 键 词： | 溶胶-凝胶法 低温燃烧合成 掺杂氧化铈 固溶体 甘氨酸 |
Preparation and sinterability of Ce0.8Sm0.2O1.9 powders by sol-gel and low temperature self-propagating synthesis |
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| YAN Ping,HU Xiaomin,SUN Xudong.Preparation and sinterability of Ce0.8Sm0.2O1.9 powders by sol-gel and low temperature self-propagating synthesis[J].Journal of Chemical Industry and Engineering(China),2011,62(1):262-268. |
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| Authors: | YAN Ping HU Xiaomin SUN Xudong |
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| Abstract: | Ultrafine Ce0.8Sm0.2O1.9 (SDC) solid solution powders were prepared by the combination of sol-gel process and self-propagating low temperature combustion synthesis with glycine as reductant and metal nitrates as oxidant.The phase identification, morphology and specific surface area of SDC powders were investigated by XRD, SEM and BET method, respectively.The results showed that SDC powders calcined at 600℃ with crystallites in the 13—30 nm ranges had a pure cubic fluorite crystalline structure.It was found that the molar ratio of glycine to metal nitrate had a great effect on both the morphology and sinterability of the powders.When the molar ratio of glycine to metal nitrate was 2 and 3, the SDC powders possessed a loose structure.The powders had good sinterability in the experiment and the sintered specimens with relative density up to over 95% could be prepared by sintering at 1400℃ for 2 h.The average grain size of the sintered specimens was 0.5 μm. |
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