Effect of Crystallization Rate on Sealing Behaviour of BaO-Al2O3-B2O3-SiO2-La2O3-TiO2 Glass System
作者： P. Nandi , A. S. Patil , B. Paul , A. Sarkar , M. Goswami
DOI: 10.1080/0371750X.2013.772729
关键词: Microstructure 、 Materials science 、 Crystallization 、 Scanning electron microscope 、 Thermal expansion 、 Differential thermal analysis 、 Alloy 、 Activation energy 、 Composite material 、 Metal
摘要: Glasses with nominal composition (mol%) 34BaO-10Al2O3-17B2O3-34SiO2-(5-x)La2O3-xTiO2 (x = 0, 1, 2, 3, 4) were prepared by melt quenching technique. Activation energy of crystallization (Ea ) was calculated Kissinger's model considering the shift in peak temperature (Tc at three different heating rates (10°, 15° and 20°C.min−1) differential thermal analysis. Among glasses studied, x 1 had maximum Ea as a result its slower rate. Thermal expansion coefficients bulk matched that Crofer 22APU alloy. Sandwich type seals made two plates 990°C their vacuum integrity tested room temperature. Cross-sectional interface studied under scanning electron microscope dispersive X-ray Very morphology metal to glass-ceramics observed varying TiO2 concentration. Microstructure seal glass had...
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