CAJ | 학술논문

以硝酸铝和碳酸铵为原料，采用化学沉淀法，在不同硝酸铝浓度下制备 Al2 O3的前驱体 Al（OH）3，再经不同温度煅烧得到 Al2 O3粉体。利用 TG-DTG、XRD、BET 及 SEM 等分析手段对粉体的性能进行了表征。结果表明，煅烧温度对 Al2 O3的晶型有着重要的影响，硝酸铝浓度为0.1 mol/ L 时制备出的粉体分散性较好，经1200℃煅烧能制备出纯度较高的形貌类似球形的α-Al2 O3粉体。
이초산려화탄산안위원료，채용화학침정법，재불동초산려농도하제비 Al2 O3적전구체 Al（OH）3，재경불동온도단소득도 Al2 O3분체。이용 TG-DTG、XRD、BET 급 SEM 등분석수단대분체적성능진행료표정。결과표명，단소온도대 Al2 O3적정형유착중요적영향，초산려농도위0.1 mol/ L 시제비출적분체분산성교호，경1200℃단소능제비출순도교고적형모유사구형적α-Al2 O3분체。
The precursor Al(OH)3 of Al2 O3 were prepared by chemical precipitation with aluminium ni-trate and sal volatile under different concentration of aluminium nitrate,and Al2 O3 powders were getted through calcining precursor at different temperature. The powders were analyzed by the TG-DTG,XRD, BET and SEM. The results showed that the calcination temperature was an important factor to the crystal form of the Al2 O3 powder. The powders with good dispersing were obtained when the concentration of alu-minium nitrate was 0. 1 mol/ L. The sphere-like α-alumina powders with high purity were obtained when the calcination temperature was 1 200 ℃.