Thermal analysis of powdered alumina materials
- 89 Downloads
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 ofα-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.
Keywordsdistribution constant DSC powder compact Rosin-Rammler particle size distribution thermal resistance
Unable to display preview. Download preview PDF.
- 1.Purity Determinations by Thermal Methods, ASTM Special Technical Publication 838, R. L. Blaine and C. K. Schoff (eds.), 1984.Google Scholar
- 3.W. W. Hillstrom, Thermal Conductivity, 16 (1979) 483.Google Scholar
- 7.Y. Nishimoto, H. Ichimura and Y. Teramoto, Netsu-sokutei, 17 (1990) 61.Google Scholar
- 9.D. A. Ditmars and T. B. Douglas, J. Res. Nat. Bur. Stand. A, 75A (1971) 401.Google Scholar
- 10.D. A. Ditmars et al., J. Res. Nat. Bur. Stand., 87 (1982) 159.Google Scholar
- 11.See, for example, G. Deutscher, A. Kaptulnik and M. Rappaport, in Percolation Structures and Processes, Ch.10, G. Deutscher, R. Zallen and J. Adler (Eds.), Adam Hilger, Bristol 1983.Google Scholar