WANG Shifeng,WANG Huanping,ZHOU Guangmiao,LI Denghao,ZHANG Bin,XU Shiqing" />
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WANG Shifeng,WANG Huanping,ZHOU Guangmiao,LI Denghao,ZHANG Bin,XU Shiqing
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王世锋,王焕平,周广淼,李登豪,张斌,徐时清
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2 h后,全部变成粒径在80~100 nm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
WANG Shifeng,WANG Huanping,ZHOU Guangmiao,LI Denghao,ZHANG Bin,XU Shiqing. Preparation and characterization of α-Al2O3 submicron powders synthesized at low temperature by sol-gel method[J]. .
王世锋,王焕平,周广淼,李登豪,张斌,徐时清. 溶胶-凝胶法低温合成亚微米α-Al2O3的制备与表征 [J]. CIESC Journal.
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https://hgxb.cip.com.cn/EN/Y2010/V61/I12/3290