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NATIONAL STANDARD OF HEAT CAPACITY MEASUREMENT OF SOLIDS IN THE RANGE 4.2-90 K: AN AUTOMATED ADIABATIC CALORIMETER FROM 25 TO 90 K AND MOLAR HEAT CAPACITIES OF ALPHA-ALUMINA.

Author(s) : TAN Z. C.

Type of article: Article

Summary

THE CONSTRUCTION OF AN AUTOMATED ADIABATIC CALORIMETER FOR HEAT CAPACITY MEASUREMENT OF SOLIDS IN THE TEMPERATURE RANGE OF 25-90 K IS DESCRIBED IN DETAIL. THE SAMPLE VESSEL OF THE CALORIMETER HAS THIN RADIAL VANES WHICH MAKE NO CONTACT WITH ITS INNER WALL AND ARE DISTRIBUTED EVENLY, THUS GREATLY IMPROVING THE INTERNAL THERMAL EQUILIBRATION OF THE VESSEL. MEASUREMENTS OF THE HEAT CAPACITIES OF HIGH PURITY ALPHA-ALUMINA, ONE OF THE INTERNATIONALLY-ACCEPTED STANDARD REFERENCE MATERIALS, AGREE WITH THOSE OF THE NBS, USA, TO WITHIN MORE OR LESS 0.3 %, DEMONSTRATING THE RELIABILITY OF THIS APPARATUS.

Details

  • Original title: NATIONAL STANDARD OF HEAT CAPACITY MEASUREMENT OF SOLIDS IN THE RANGE 4.2-90 K: AN AUTOMATED ADIABATIC CALORIMETER FROM 25 TO 90 K AND MOLAR HEAT CAPACITIES OF ALPHA-ALUMINA.
  • Record ID : 1992-0529
  • Languages: English
  • Source: Sci. China, B - vol. 34 - n. 5
  • Publication date: 1991/05
  • Document available for consultation in the library of the IIR headquarters only.

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