ENTHALPY AND HEAT-CAPACITY STANDARD REFERENCE MATERIAL: SYNTHETIC SAPPHIRE ( alpha -Al2O3) FROM 10 TO 2250 K.

Abstract

Herefore unpublished enthalpy data which were used in the derivation of smooth enthalpy and heat-capacity data for NBS SRM (Standard Reference Material) 720 ( alpha //2O//3, heat capacity and enthalpy standard) are presented along with some details of the high-temperature experiments. Recent NBS low-temperature measurements on SRM 720 are smoothed by a least-squares spline technique and a revised table of certified values for enthalpy and heat capacity of alpha -Al//2O//3 from 10 K to near the melting point (2250 K) is presented.