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Том 475, № 2 (2017)
- Год: 2017
- Статей: 3
- URL: https://journals.rcsi.science/0012-5016/issue/view/9223
Physical Chemistry
High-temperature heat capacity of erbium titanate with a pyrochlore structure
Аннотация
Erbium titanate with a pyrochlore structure has been synthesized by a ceramic method from stoichiometric Er2O3–TiO2 mixtures at 1673–1773 K. The high-temperature heat capacity of Er2Ti2O7 (320–1000 K) has been studied by differential scanning calorimetry. The thermodynamic functions of this oxide compound—enthalpy and entropy changes and reduced Gibbs—have been calculated from the experimental dependence CP = f(T).
139-141
High-potential electrolytes for supercapacitors: Lithium polyaspartate
Аннотация
It was shown that widening the electrochemical window and considerable increase in the electrical energy stored by pseudocapacitor (supercapacitor) type devices can be attained by inclusion of polymeric electrolytes, such as lithium polyaspartate.
142-144
Production of alloys in the Fe–Co system with an oxygen concentration below 10 ppm
Аннотация
A fundamentally new solution of the challenge of producing alloys in the Fe–Co system with an oxygen concentration below 10 ppm (10–3%) has been for the first time justified and demonstrated. A thermodynamic analysis showed that decreasing the pressure of the gas phase over the melt significantly increases the deoxidizing power of carbon. At cobalt and carbon contents characteristic of soft- and hard-magnetic alloys and a total pressure of 0.01 atm, the oxygen concentration was 10–1 ppm (10–3–10–4%). With increasing cobalt content of the melt, the deoxidizing power of carbon increases. The curves of the oxygen solubility in carbon-containing iron–cobalt melts pass through a minimum, which shifts toward lower carbon contents with increasing cobalt content of the melt.
145-148