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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Al_2O_3的影响 被引量:7

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
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摘要 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. 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.
出处 《燃料化学学报》 EI CAS CSCD 北大核心 2001年第1期76-79,共4页 Journal of Fuel Chemistry and Technology
基金 四川省应用基础基金&&
关键词 高表面氧化铝 溶胶-凝胶法 热稳定性 制备 催化剂载体 lanthanum high surface area alumina thermal stability sol-gel method
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