Effect of Rare Earth Nano-Oxides on Sintering and Crystallization of Fused Quartz Ceramic Materials
Fused quartz powder (size<0.04mm) was used as raw material, nano-Y2O3, nano-CeO2 and nano-La2O3 (size<0.08μm) were dividedly used as additives with dosage of 2% each. Fused quartz ceramic materials were sintered in reduction atmosphere at 1300°C, 1350°C and 1400°C for 1h. The effect of rare earth nano-oxides on sintering and crystallization of the fused quartz ceramic were researched by measurements of apparent porosity, bending strength and thermal expansion rate, and analyses of XRD and SEM. The results showed that additives nano-Y2O3, nano-CeO2 and nano-La2O3 had obvious effect of inhibiting crystallization of fused quartz, and the samples added nano-Y2O3 and nano-La2O3 were better. Sample added nano-Y2O3 had least thermal expansion rate. Sample added nano-La2O3 had higher bending strength, and it showed that nano-La2O3 had better effect on sintering of fused quartz ceramic. It can be deduced that nano-La2O3 plays the excellent role as the crystallization inhibitor of fused quartz materials.
Pengcheng Wang, Liqun Ai, Yungang Li, Xiaoming Sang and Jinglong Bu
Y. J. Chen et al., "Effect of Rare Earth Nano-Oxides on Sintering and Crystallization of Fused Quartz Ceramic Materials", Advanced Materials Research, Vols. 295-297, pp. 1418-1421, 2011