In this study, MgO-CaO-Al2O3-SiO2 (MCAS) glass oxide fabricated by a conventional melting process was used as a sintering additive to prepare dense AlN ceramics at lower temperatures. AlN specimen with 5 wt.% MCAS glass oxide was produced by sintering in a dilatometer and a conventional furnace. The sintering behavior of the glass-doped AlN was investigated by means of dilatometric analysis, X-ray diffraction analysis, and field-emission scanning electron microscopy microstructural observation. Results revealed that the melted glass phase had a significant effect on the densification of the AlN ceramics by a liquid-phase sintering. This led to a reduction in the sintering temperature by 200 °C from the 1800 °C required for conventional AlN-rare earth or -alkaline earth oxide system.
|Number of pages||5|
|Journal||International Journal of Refractory Metals and Hard Materials|
|Publication status||Published - 2015 Nov|
Bibliographical noteFunding Information:
This research was supported by the Korea Institute for the Advancement of Technology .
© 2015 Elsevier Ltd. All rights reserved.
All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry