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Sintering Additives to Eliminate Interphases in Cordierite Ceramics

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Effects of the sintering additives CeO2 and K2O on eliminating interphases of cristobalite and spinel were studied by means of XRD, SEM/energy-dispersive spectrometer, and TMA techniques to obtain high cordierite contents. Adding 4 wt% CeO2 significantly stimulates the conversion of cristobalite to cordierite, depresses spinel formation and yields less glassy phase. It is helpful to prepare a ceramic with a high content of cordierite and a low thermal expansion coefficient when sintered at 1400°C for 3 h. Addition of 1–2 wt% K2O results in a large amount of glassy phase and is less effective in eliminating the interphases.
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Document Type: Research Article

Affiliations: School of Materials Science and Engineering, Inner Mongolia University of Technology, Hohhot, Inner Mongolia 010062, China

Publication date: May 1, 2005

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