Preparation of 30 mol.% Y-doped hafnia (Hf0.7Y0.3O2-δ) using a modified solid-state reaction method

被引：6

作者：

Bu, Junfu ^{[1
]}

Jonsson, Par G. ^{[1
]}

Zhao, Zhe ^{[1
,2
]}

机构：

[1] KTH Royal Inst Technol, Dept Mat Sci & Engn, SE-10044 Stockholm, Sweden

[2] Shanghai Inst Technol, Dept Mat Sci & Engn, Shanghai 201418, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2015年 / 41卷 / 02期

关键词：

Solid state reaction; Milling; Sintering; Fuel cells; ELECTRICAL-CONDUCTIVITY; PROTON CONDUCTIVITY; LATTICE-PARAMETERS; IONIC-CONDUCTIVITY; YSZ; ZIRCONIA; YTTRIA; SYSTEMS; FILMS;

D O I：

10.1016/j.ceramint.2014.10.036

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A pure and well-crystallized Hf0.7Y0.3O2-delta (YSH) powder was synthesized using a modified solid-state reaction method. Water-based milling and freeze drying process were implemented to facilitate powder synthesis and final densification process. The improved powder performance, in aspects of phase development and sintering behaviour, was investigated by systematic comparison between different powder processing procedures. Dense YSH ceramic material with a relative density of 0.975 was successfully obtained using conventional sintering at 1650 degrees C for 10 h. XRD, SEM and EDS were employed to characterize the synthesized powder and dense YSH ceramics. Dense YSH ceramic possesses a fluorite cubic structure with an a value of 5.1406 angstrom, and the ionic radius of Y3+ in YSH was determined to be 0.1006 nm. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：2611 / 2615

页数：5

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