Dissolution of Alumina, Sintering, and Crystallization in Glass Ceramic Composites for LTCC

Autor:	Markus Eberstein, Joachim Deubener, Ralf Müller, Robert Meszaros, Stefan Reinsch, Burkhard Peplinski, Wolfgang A. Schiller
Rok vydání:	2009
Předmět:	Materials science Glass-ceramic Rietveld refinement Sintering engineering.material Anorthite Microstructure Wollastonite law.invention law visual_art Materials Chemistry Ceramics and Composites engineering visual_art.visual_art_medium Ceramic Crystallization Composite material
Zdroj:	Journal of the American Ceramic Society. 92:1703-1708
ISSN:	1551-2916 0002-7820
DOI:	10.1111/j.1551-2916.2009.03089.x
Popis:	Sintering and microstructure evolution of alkali-free calcium–alumo–borosilicate glass/α-Al2O3 composites (mean particle size ca. 2 μm) for low-temperature cofired ceramics were studied during heating at 5 K/min by heating microscopy, thermal analysis (DTA), X-ray diffraction (XRD), and electron microscopy (SEM). Composites fully densify at ≈830°C, not essentially influenced by the dissolution of alumina and glass crystallization. Thus wollastonite, as first crystalline phase, was detectable at 840°C. Above 900°C, a pronounced crystallization of anorthite is evident, reaching 60 wt% at 1050°C. Rietveld analyses of XRD data revealed that anorthite precipitates at the expenses of alumina, which declines from ≈33 to
Databáze:	OpenAIRE
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