Electric current assisted sintering of AlN ceramics: thermal conductivity and transparency

Autor:	N. Hirosaki, T. Nishimura
Rok vydání:	2014
Předmět:	Secondary phase Materials science Aluminium nitride Oxide Sintering Industrial and Manufacturing Engineering chemistry.chemical_compound Thermal conductivity chemistry visual_art Ceramics and Composites visual_art.visual_art_medium Ceramic Electric current Composite material Oxygen impurity
Zdroj:	Advances in Applied Ceramics. 113:89-93
ISSN:	1743-6761 1743-6753
DOI:	10.1179/1743676113y.0000000093
Popis:	Densification, thermal conductivity and transparency of aluminium nitride ceramics densified by electric current assisted sintering are reviewed. Aluminium nitride powders could be densified without any sintering additives by electric current assisted sintering. Sintering additives, Y2O3 or CaF2, and others are effective for densification, increase in thermal conductivity and transparency. As a result of the reaction with the sintering additives and oxide on the surface of the AlN powder, a secondary phase forms between AlN grains, oxygen impurity between aluminium nitride grains decreases and thermal conductivity increases. These mechanisms are effective in the sintering of aluminium nitride ceramics densified by electric current assisted sintering, though sintering time is short, within 5 min. The secondary phase formation does not always give good effect for transparency.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0a214fa03f7d37b46e1dda6eed519e78 https://doi.org/10.1179/1743676113y.0000000093 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
Nepřihlášeným uživatelům se plný text nezobrazuje	K zobrazení výsledku je třeba se přihlásit.