Thermal analysis of powdered alumina materials |
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Authors: | Riko Ozao Hiroshi Ogura Moyuru Ochiai Sadao Tsutsumi |
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Institution: | (1) Department of Electronics and Informatics, North Shore College of SONY Institute, Atsugi, 243 Kanagawa;(2) School of Education, Waseda University, Shinjuku, 160-50 Tokyo, Japan |
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Abstract: | How a DSC result is influenced by the particle size distribution of a powder sample is shown, and a simple and optimal method to be included in a routine DSC analysis (e.g., purity determination) to improve the reliability of the analysis is proposed. In case of -Al2O3 powder, most reliable heat capacity data can be obtained by preparing a powder with a self-similar particle size distribution with a distribution constant of 0.7, and by compressing it under a pressure of 1.5 MPa for a duration of 5 min or longer.This work is partially supported by the Research Fund of North Shore College of SONY Institute. R.O. wishes to express her gratitude to the support. |
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Keywords: | distribution constant DSC powder compact Rosin-Rammler particle size distribution thermal resistance |
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