Effect of yttria on the thermal conductivity of aluminum nitride

Journal Article · Fri Jul 01 04:00:00 EDT 1994 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1994.tb07060.x· OSTI ID:6982420

Sainz de Baranda, P ^[1]; Knudsen, A K ^[2]; Ruh, E ^[3]

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1. Union Technologica Espana, San Sebastian (Spain)
2. Dow Chemical Co., Midland, MI (United States). M.E. Pruitt Research Center
3. Rutgers-the State Univ., Piscataway, NJ (United States). Dept. of Ceramics

The effect of yttria additions up to 10 wt% on the thermal conductivity of pressureless-sintered aluminum nitride was investigated. Additions of up to 3 wt% increased the thermal conductivity to values around 160 W/(m[center dot]K). Additions higher than 5 wt% slowly decreased the thermal conductivity because of the increasing volume fraction of the low-conductivity yttrium aluminate phases. In all cases samples containing the same yttria content with the binder burned out in nitrogen had higher thermal conductivity than those with the binder burned out in air. Comparisons are made to previous studies containing additives of silica and calcia to aluminum nitride.

• OSTI ID: 6982420
• Journal Information: Journal of the American Ceramic Society; (United States), Journal Name: Journal of the American Ceramic Society; (United States) Vol. 77:7; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALUMINIUM COMPOUNDS
ALUMINIUM NITRIDES
CHALCOGENIDES
FABRICATION
METALLURGICAL EFFECTS
NITRIDES
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PNICTIDES
SINTERING
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES