A low silica, barium borate glass-ceramic for use as seals in planar SOFCs

被引：15

作者：

Laorodphan, Nattapol ^{[1
]}

Namwong, Prachaya ^{[2
]}

Thiemsorn, Worapong ^{[1
]}

Jaimasith, Manat ^{[1
]}

Wannagon, Anucha ^{[3
]}

Chairuangsri, Torranin ^{[1
]}

机构：

[1] Chiang Mai Univ, Fac Sci, Dept Ind Sci, Chiang Mai 50202, Thailand

[2] Chiang Mai Univ, Fac Sci, Dept Phys, Chiang Mai 50202, Thailand

[3] Natl Met & Mat Technol Ctr, Pathum Thani 12120, Thailand

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2009年 / 355卷 / 01期

关键词：

Crystallization; Glass ceramics; Nucleation; Diffraction and scattering measurements; Glass formation; Glass transition; Glasses; SEM S100; Microscopy; Scanning electron microscopy; Microstructure; Oxide glasses; Borates; Thermal properties; Calorimetry; X-rays; X-ray diffraction; X-ray fluorescence; OXIDE FUEL-CELLS; COMPOSITES; ZN; MG;

D O I：

10.1016/j.jnoncrysol.2008.07.044

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 low silica, barium borate glass-ceramic for use as seals in planar SOFCs containing 64 mol%BaO, 3 mol%Al2O3 and 3 mol%SiO2 was studied. Coefficient of thermal expansion (CTE) between 275-550 degrees C, glass transition temperature (T-g), and dilatometric softening point (T-s) of the parent glass were 11.9 x 10(-6)degrees C-1, 552 degrees C, and 558 degrees C. respectively. Glass-ceramic was produced by devitrification heat treatment at 800 degrees C for 100 h. It was found that nucleation heat treatment, seeding by 3 wt%ZrO2 as glass-composite and pulverization affected the amount, size and distribution of crystalline phases. SEM-EDS and XRD results revealed that crystalline phases presented in the devitrified glass-ceramic were barium aluminate (BaAl2O4), barium aluminosilicate (BaAl2Si2O8) possibly with boron associated in its crystal structure, and barium zirconate (BaZrO3). CTE of the devitrified glass-ceramic was in the range of (10.1-13.0) x 10(-6)degrees C-1. Good adhesion was obtained both in the cases of glass and devitrified glass-ceramic with YSZ and AISI430 stainless steel. Interfacial phenomena between these components were discussed. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：38 / 44

页数：7