Preparation of high-purity YAG powders by Gel Solid-State Reaction
YAG crystal possesses chemical stability, mechanical intension, thermal conductivity and isotropy. These properties make it widely be used as functional and structural materials. YAG powder was successfully synthesized by gel solid-state reaction. AlOOH were reacted respectively with Y2(C2O4)3·10H2O (Route YI) and Y2O3 (Route YII). The XRD indicated that the main phases were from YAM to YAP, finally to YAG with the increase of temperature in both routes, and YAG began to generate at 1250℃. The single-phase YAG generated after holding for 4h at 1450℃ in the YI, but a little bit of YAP and Al2O3 was still remained in the YI. It was that Y2(C2O4)3·10H2O might be decomposed into high-activity, loose-structure yttrium oxide, which promoted the diffusion of Al3+ ion. According to XRD analysis, YAG generated slowly during 1250℃～1300℃ and then fast during 1300℃～1450℃. The SEM images showed that the primary particles of YI were 2-3μm, larger than that of YII. Particle distribution indicated that the average diameter is 18.68μm in the YI and 9.35μm in the YII.
yttrium aluminate garnet gel solid-state reaction powders
WANG Xiu-hui ZHAO Guo-quan LU Sheng-bo LI Gang
Liaoning Key Laboratory for fabrication and Application of Super-fine Inorganic Powders, Dalian Jiaotong University, Dalian, Liaoning, 116028, China
国际会议
青岛
英文
1807-1810
2009-10-09（万方平台首次上网日期，不代表论文的发表时间）