A method of determination of the thermal diffusivity of refractory powders in the 400?1200�K range
| Autor: | S. L. Bondarenko, E. Ya. Litovskii, I. G. Fedina |
|---|---|
| Rok vydání: | 1986 |
| Předmět: |
Materials science
business.industry chemistry.chemical_element Mineralogy Thermodynamics Temperature cycling Yttrium Atmospheric temperature range Thermal diffusivity Temperature measurement Thermal conductivity chemistry Thermal insulation Thermocouple Ceramics and Composites Materials Chemistry business |
| Zdroj: | Refractories. 27:119-124 |
| ISSN: | 1573-9139 0034-3102 |
| DOI: | 10.1007/bf01398305 |
| Popis: | This paper describes a method of measurement of the thermal diffusivity of refractory powders at temperatures of 400-2100 K in different gaseous media in the p = 10/sup 2/-10/sup 5/ Pa pressure range. The method developed is based on the rules of steady heating of cylindrical specimens. The calculation equation has a form characteristic of regular conditions of the second order in an infinite cylinder with corrections for the deviation from quasisteadiness and for the nonuniformity of the temperature field in the specimen. Thermal diffusivities of magnesite powder and PIT-1 yttrium oxide powder are shown in different gaseous media. The method developed possesses satisfactory accuracy and makes it possible to obtain information on the thermal divusivity and conductivity of refractory powders in a broad temperature range and in the area of high temperature. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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