Thermodynamic properties of boron suboxide in the temperature range 11.44–781.8 K

Liquid phase assisted hot pressing of boron suboxide-materials

“…15 = 39.91 J/(mol K) and the enthalpy of formation as H θ f (B 6 O, s, 298.15 K) = −527 ± 32 kJ mol −1 . 11 The temperature dependent heat capacity was established for the temperature range 298.15-800 K as C p = 54.55936 + 17.263 × 10 −2 T −28.2 × 10 5 T −2 (J/(mol K)) 12 (1)…”

“…A possible way for predicting the phase formation in B 6 O composites during sintering is the thermodynamic calculation of the equilibrium phases. However, current knowledge on the thermodynamic properties of boron suboxide is limited to temperatures of up to 800 K. [11][12][13] The entropy was determined to be S 298. 15 = 39.91 J/(mol K) and the enthalpy of formation as H θ f (B 6 O, s, 298.15 K) = −527 ± 32 kJ mol −1 .…”

Thermoelastic equation of state of boron suboxide B6O up to 6 GPa and 2700 K: Simplified Anderson-Grüneisen model and thermodynamic consistency

“…4a shows the heat capacity c p of B 6 O as a function of temperature. Three experimental sets of data are presented: one corresponding to the low-temperature measurements [23], one high-temperature set up to 780 K [23] and very recent data up to 1250 K [26]. The latter gives higher heat capacity values in the high-temperature range, and the fitting parameters for Eq.…”

“…capacity c p experimental data [18,23,26] In order to solve Eq. 17 in respect to V(T), one can easily use the iteration method…”

“…300-K equation of state to 60 GPa [22], data on the heat capacity to 800 K [23] and some other thermodynamic properties [12,18] of B 6 O are established. Still, the experimental high pressurehigh temperature thermodynamic data are lacking, which render difficult predictions and synthesis of new challenging materials, for example, in the B-N-O system at high pressures [24].…”