Preparation and characteristic of NASICON ceramics

作     者：ZHU Dongmei LUO Fa XIE Zhanglong ZHOU Wancheng ZHU Dongmei, LUO Fa, XIE Zhanglong, and ZHOU Wancheng State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi′an 710072, China

作者机构：State Key Laboratory of Solidification Processing Northwestern Polytechnical University Xi''an 710072 China State Key Laboratory of Solidification Processing Northwestern Polytechnical University Xi''an 710072 China State Key Laboratory of Solidification Processing Northwestern Polytechnical University Xi''an 710072 China State Key Laboratory of Solidification Processing Northwestern Polytechnical University Xi''an 710072 China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2006年第25卷第z1期

页      面：39-42页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

主　　题：NASICON normal sintering hot pressed sintering electronic conductivity 

摘      要：Hot-pressed sintering was employed to prepare the sodium super ionic conductor (Na1+xZr2SixP3-xO12, 1.8≤x≤2.2) ceramics and compare with the sample obtained from normal-press sintering. The phase formation, density, and conductivity of the hot-press sintered and the normal-press sintered samples were investigated in detail. Results show that the density of NASICON ceramics and the degree of crystallization can be improved by hot-press process efficiently. The density of the sample sintered by normal sintering is obviously lower than that sintered by hot press. XRD analysis indicates all the hot press sintered samples contain mainly monoclinic NASICON and no ZrO2 phase was found. The ionic conductivity of normal-press sintered sample is much lower than that of hot-press sintered sample. When the composition is close to Na3Zr2Si2PO12, the dc conductivities of the hot press sintered samples were in the order of 10-3 S·cm-1. The variation of the ac conductivity with frequency in the high frequency region agrees with the power law feature of σ(ω)∝ωn(0n1).