人工晶体学报2011，Vol.40Issue(1)：224-228,5.
MgAl2O4粉体的低温燃烧合成与烧结性能
Low-temperature Combustion Synthesis and Sintering Properties of MgAl2 O4 Powders
摘要
Abstract
Nano-sized MgAl2O4 powders were synthesized via a low-temperature combustion process using urea, glycine and starch as fuel, and the effects of NH4NO3 ( as an oxidizer) addition on combustion process, characteristics and sinterability of MgAl2O4 powders were also investigated. The microstructure and phase composition of MgAl2O4 powders were characterized by XRD and SEM, respectively. The experimental results reveal that as the NH4NO3 addition increasing, the combustion type transforms from flamless combustion to flaming combustion, the flaming combustion time increases significantly, ignition loss of the combustion products decreases remarkably, and the crystallite size of MgAl2O4 powders enlarges markedly. On the other hand, the sinterability of MgAl2O4 powders firstly increases significantly and then decreases as the NH4NO3 addition increasing. The MgA12O4 powder synthesized from the precursor with the NH4N03/( Al ( NO3 )3 + Mg ( NO3 )2 ) molar ratio of 0. 04/0. 15 exhibits higher sinterability as compared with other powders and the ceramics from the powder has a relative density as high as 98％.关键词
低温燃烧/MgAl2O4/烧结活性Key words
low-temperature combustion/ MgAl2 O4/ sinterability分类
化学化工引用本文复制引用
白佳海,刘俊成..MgAl2O4粉体的低温燃烧合成与烧结性能[J].人工晶体学报,2011,40(1):224-228,5.基金项目
山东省高校自然科学基金(J08LA10)资助项目 （J08LA10）
