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高温高表面氧化铝新材料的制备化学研究 Ⅳ.镧组分对溶胶-凝胶法制高比表面Al2O3的影响
RESEARCH ON A NEW CATALYTIC MATERIAL-HIGH TEMPERATURE RESISTANT ALUMINA WITH HIGH SPECIFIC SURFACE AREA Ⅳ.EFFECT OF LANTHANUM ON PREPARING HIGH-SURFACE AREA ALUMINA BY SOL-GEL METHOD
【Abstract】 A high temperature resistant alumina with high specific surface area was prepared by sol-gel method. XRD,TEM,XPS and surface analysis method were used to study the effect of dopant lanthanum on the alumina.The results showed that lanthanum ion could suppress alumina transition to α-phase and then inhibit alumina from sintering and the thermal stability of the Al 2O 3 was improved. Different ratios of La/Al had different effects on the specific surface area of Al 2O 3.The Al 2O 3 containing 1.0 mol/% lanthanum has a BET specific surface area of 71.8 m 2/g after calcination for 32 hours at 1*#100℃, whereas the undoped Al 2O 3 only had a BET specific surface area of 10 m 2/g under similar conditions.
【关键词】 高表面氧化铝；
溶胶凝胶法；
镧；
热稳定性；
【Key words】 lanthanum； high surface area alumina； thermal stability； sol-gel method；
【Key words】 lanthanum； high surface area alumina； thermal stability； sol-gel method；
【基金】 四川省应用基础基金&&
- 【文献出处】 燃料化学学报 ,Journal of Fuel Chemistry and Technology , 编辑部邮箱 ,2001年01期
- 【分类号】TQ426
- 【被引频次】28
- 【下载频次】230