Effect of Second Phase After-Heat Treatment on the Thermal Conductivity of AlN Ceramics

Hyeon Keun Lee; Do Kyung Kim

doi:10.4028/www.scientific.net/KEM.403.61

Paper Titles

Non-Oxide Ceramic Nanocomposites with Multifunctionality
p.45

Electrical Resistivity Control of Hot-Pressed Aluminum Nitride Ceramics
p.49

Fracture Resistance and Wear Properties of Silicon Nitride Ceramics
p.53

Oxidation of Rare Earth Silicon Oxynitride J-Phases
p.57

Effect of Second Phase After-Heat Treatment on the Thermal Conductivity of AlN Ceramics
p.61

Thermal Conductivity Measurement of the AlN Ceramics at the Grain Scale Using Thermoreflectance Technique
p.65

Viscosity Measurement of Molten RE-Mg-Si-O-N (RE=Y, Gd, Nd and La) Glasses
p.69

First Principles Calculations of Advanced Nitrides, Oxides and Alloys
p.73

Advances in Computation of Temperature-Pressure Phase Diagrams of High-Pressure Nitrides
p.77

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Effect of Second Phase After-Heat Treatment on the Thermal Conductivity of AlN Ceramics

Abstract:

The high thermal conductivity of Aluminum nitride, coupled with its high electrical resistivity and nontoxic nature, makes it a very promising material for electronic substrate. In this study, microstructural characterization on the thermal conductivity of AlN ceramics was investigated. An AlN ceramic was prepared with a dopant Y2O3 under a reducing nitrogen atmosphere with carbon. In order to obtain high thermal conductivity, cooling rate control and after-heat treatment was carried out. Morphology of the second phase was characterized using scanning electron microscopy (SEM). SEM studies showed that the microstructural change caused by after-heat treatment have a major influence on the thermal conductivity.