Mechanical Engineering Faculty Research

Title

Synthesis and Characterization of Sr-and Mg-doped LaGaO_3 Powders by Polyvinylpyrrolidone Microwave-induced Solution Polymerization

Document Type

Article

Publication Date

4-2007

Abstract

A new chemical route,named microwave-induced polyvinylpyrrolidone(PVP) solution polymerization,has been used to prepare La0.8Sr0.2Ga0.83Mg0.17O2.815(denoted as LS0.2GM0.17) powder.The effect of different contents of PVP as the polymeric carrier was studied and we obtained the optimum amount of PVP,which could ensure the homogenous distribution of the metal ions in its polymeric network structure and inhibit their segregation from the solution.The behavior of the powder after calcination at different temperatures was studied.The PVP solution process consumed less organics compared with traditional Pechini process.Consequently,PVP was a more effective carrier in the preparation of LSGM.High heating rate and more homogenous heating manner without thermal gradient in the microwave oven resulted in less secondary phases in the LS0.2GM0.17 powder after calcination at 1400℃ for 9 h and smaller pellet grain size(2-3μm) without segregation.

Publication Title

Journal of Functional Materials and Devices

Volume

13

Issue

4

First Page

323