摘要
以Sc2O3、Zr(NO3)4·3H2O和NH3·H2O为原料制备出了钪锆陶瓷粉。运用差示/热重(DSC/TG)、X-射线衍射(XRD)、扫描电镜(SEM)等手段,对钪锆陶瓷粉前驱体的热稳定性、相结构、表观状态及脱水动力学参数进行了分析。通过多重速率扫描法记录样品在不同升温速率下的DSC/TG曲线,采用kissinger法对钪锆陶瓷粉前驱体的热分解动力学进行研究。结果表明,钪锆前驱体为无明显晶形,400℃完成脱水反应生成钪锆陶瓷粉,486℃开始晶型转变为立方相,前驱体脱水反应的表观活化能E为99.62 kJ/mol,指前因子A为3.53×107,反应级数为1.2。
Scandia-doped zirconia（ ScSZ） ceramic powders were prepared from Sc2O3,Zr（ NO3） 4·3H2O and NH3·H2O as starting materials. DSC-TG,XRD and SEM were employed to characterize the samples. The decomposition kinetic parameters of the synthesized precursor of scandia-doped zirconia（ ScSZ） ceramic powders were studied at different temperature rising-rate with the method of Kissinger. The results show that the sythesized precursor is amorphous,it dehydrates and decomposes to scandia-doped zirconia（ ScSZ） ceramic powder at about 400℃,then transforms into the cubic phase at about490 ℃. The activation energy,the pre-exponential factor,and the reaction order are 99. 62 kJ /mol,3. 53 × 10^7,and 1.2 respectively.
出处
《稀土》
EI
CAS
CSCD
北大核心
2014年第3期45-48,共4页
Chinese Rare Earths
关键词
钪锆陶瓷粉
脱水分解
动力学
活化能
scandia-doped zirconia ceramic powder
dehydration decomposition
kinetics
activation energy
作者简介
刘吉波（1973-），男，湖南长沙人，博士，高级工程师，主要从事有色金属冶金领域研究。
通讯联系人
