| 溶胶-凝胶法低温合成亚微米α-Al_2O_3的制备与表征 |
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| 引用本文： | 王世锋,王焕平,周广森,李登豪,张斌,徐时清.溶胶-凝胶法低温合成亚微米α-Al_2O_3的制备与表征[J].化工学报,2010,61(12):3290-3295. |
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| 作者姓名： | 王世锋 王焕平 周广森 李登豪 张斌 徐时清 |
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| 作者单位： | 中国计量学院材料科学与工程学院,浙江 杭州 310018 |
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| 基金项目： | 教育部新世纪优秀人才支持计划,浙江省科技计划项目 |
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| 摘 要： | 以硝酸铝、硝酸铜、钛酸丁酯为原料,采用溶胶-凝胶法低温合成亚微米氧化铝粉体,并对不同温度煅烧后粉体的物相与形貌进行表征。通过在硝酸铝的无水乙醇溶胶中引入少量CuO-TiO2氧化物助剂前驱体,在80℃水浴中长时间静置后获得浅蓝色凝胶,在不同温度下煅烧该凝胶,结果发现:煅烧温度低于950℃时,所获得的粉体主要为无定形态,仅含有少量的γ-Al2O3;将凝胶在1000℃煅烧2h后,全部变成粒径在80～100nm之间、粉体颗粒呈球形的α-Al2O3;当煅烧温度升高到1050℃时,α-Al2O3的颗粒直径长大到200～400nm。CuO-TiO2氧化物助剂前驱体的引入,不但降低了α-Al2O3的晶相合成温度,同时促进了α-Al2O3粉体颗粒的生长。
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| 关 键 词： | 溶胶-凝胶 氧化铝 亚微米粉体 低温合成 |
Preparation and characterization of a-A1Z03 submicron powders synthesized at low temperature by sol-gel method |
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| WANG Shifeng,WANG Huanping,ZHOU Guangmiao,LI Denghao,ZHANG Bin,XU Shiqing.Preparation and characterization of a-A1Z03 submicron powders synthesized at low temperature by sol-gel method[J].Journal of Chemical Industry and Engineering(China),2010,61(12):3290-3295. |
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| Authors: | WANG Shifeng WANG Huanping ZHOU Guangmiao LI Denghao ZHANG Bin XU Shiqing |
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| Abstract: | Using Al(NO3)3·9H2O, Cu(NO3)2·3H2O and Ti(OC4H9)4 as raw materials, Al2O3 submicron powders were synthesized at a low temperature by the sol-gel process, and the phase and microstructure of powders were investigated.By doping Cu(NO3)2·3H2O and Ti(OC4H9)4 into alumina sol, a blue gel was obtained through placing the sol at 80℃ for a long time.Calcining the blue gel at 950℃ for 2 h produced amorphous Al2O3 powder with only a little γ-Al2O3 crystal phase, while α-Al2O3 nanopowders with a diameter of 80—100 nm were formed at the calcining temperature of 1000℃.As the calcining temperature increased to 1050℃, the grains grew to 200—400 nm.These results indicated that the synthesis temperature of α | |
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