A study of the thermal conductivity of alumina/glass dispersed composites

Conference · Fri Sep 01 04:00:00 EDT 1989 · International Journal of Thermophysics; (USA)

OSTI ID:6258352

Allitt, M L; Whittaker, A J; Onn, D G ^[1]; Ewsuk, K G ^[2]

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1. Univ. of Delaware, Newark (USA)
2. E.I. du pont de Nemours and Co., Wilmington, DE (USA)

The thermal diffusivity of five groups of alumina/glass composite systems has been measured at room temperature using a laser flash system. These data have been used, in conjunction with specific heat and density measurements, to calculate the effective thermal conductivity of these composites. In each of the five groups a systematic variation in glass concentration was made, and each group represents systematic variations in glass and alumina particle sizes. The thermal conductivities calculated are compared with those predicted by four models. It is apparent from these comparisons that the geometry and orientation of porosity within the sample measured are a key factor in determining which of these models (if any) is appropriate for describing the thermal conductivity of these composites.

• OSTI ID: 6258352
• Report Number(s): CONF-880606--
• Conference Information: Journal Name: International Journal of Thermophysics; (USA) Journal Volume: 10:5
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
360603 -- Materials-- Properties
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BORON COMPOUNDS
BORON OXIDES
CALCULATION METHODS
CHALCOGENIDES
COMPARATIVE EVALUATIONS
COMPOSITE MATERIALS
DENSITY
ELECTROMAGNETIC RADIATION
GLASS
HEAT FLOW
LASER RADIATION
MATERIALS
MATHEMATICAL MODELS
MEASURING METHODS
MEDIUM TEMPERATURE
OXIDES
OXYGEN COMPOUNDS
PARTICLE SIZE
PHYSICAL PROPERTIES
POROSITY
RADIATIONS
SIZE
SPECIFIC HEAT
SUBSTRATES
THERMAL CONDUCTIVITY
THERMAL DIFFUSIVITY
THERMODYNAMIC PROPERTIES