Quantitative Analysis of Crystalline and Amorphous Phases in Glass-Ceramic Composites Like LTCC by the Rietveld Method

Glass–ceramic composites like low‐temperature cofired ceramics are densified at temperatures below 900°C via liquid‐phase sintering. For high‐frequency applications, materials with low dielectric losses are needed. At these frequencies glass exhibits higher dielectric losses than a crystalline phase...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2006-08, Vol.89 (8), p.2632-2637
Main Authors: Kemethmüller, Stefan, Roosen, Andreas, Goetz-Neunhoeffer, Friedlinde, Neubauer, Jürgen
Format: Article
Language:English
Subjects:
Analysis
Applied sciences
Building materials. Ceramics. Glasses
Ceramics
Chemical industry and chemicals
Crystal structure
Crystallization
Dielectric loss
Exact sciences and technology
Glass
Glass ceramics
Glasses
Liquid phase sintering
Phases
Temperature
X-rays
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Summary:Glass–ceramic composites like low‐temperature cofired ceramics are densified at temperatures below 900°C via liquid‐phase sintering. For high‐frequency applications, materials with low dielectric losses are needed. At these frequencies glass exhibits higher dielectric losses than a crystalline phase; therefore, the glass amount is reduced after densification by crystallization. To perform a quantitative X‐ray analysis of such glass–ceramic composites, a method based on Rietveld refinement was developed. For optimum results, the X‐ray diffraction patterns were fitted using the software TOPAS 2.1 from Bruker AXS. With this method, it is possible to determine quantitatively the amount of crystalline phases and also the amount of the remaining amorphous phase.
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1551-2916.2006.01113.x