MEASURED ENTHALPY AND DERIVED THERMODYNAMIC PROPERTIES OF ALPHA BERYLLIUM NITRIDE, BE3N2, FROM 273 TO 1200 K

Abstract

Measurement were carried out on 95% purity Be//3N//2 in temperature range 273 to 1173 K using a drop calorimetric method. After correction heat capacity as function of temperature was adjusted to join smoothly that from recent precise NBS adiabatic calorimetry which covered the range 20 to 315 K. The enthalpy, heat capacity, entropy, and Gibbs free-energy function were eomputed from empirical functions of temperature and tabulated from 273 to 1200 K.