45-48
SOLID-PHASE SYNTHESIS OF CALCIUM FERRITE WITH BROWNMILLERITE STRUCTURE
DOI: 10.6060/tcct.20165912.5495
Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2016. V. 59. N 12. P. 45-48
The process of calcium ferrite preparing from ferrum (II) oxalate and calcium hy-droxide by solid-phase interaction was studied using data of X-ray diffraction, X-ray phase analysis, simultaneous thermal analysis, and scanning electron microscopy. X-ray phase analysis results of a sample subjected to heat treatment at 750 °C for 3 h, show formation of single-phase brownmillerite structure of calcium ferrite Ca2Fe2O5. Analysis of the DTA shows that crystallization process continues up to 1000 °C. Calculation of substructure parameters of Ca2Fe2O5 shows that the area of coherent X-ray scattering is 198 Ǻ, total amount of mi-crostrains is 0.8 %. The specific surface area of the sample is not more 5 m2/g.
Key words: calcium ferrite, solid phase synthesis, brownmillerite structure
REFERENCES
2016, Т. 59, № 12, Стр. 45-48
ТВЕРДОФАЗНЫЙ СИНТЕЗ ФЕРРИТА КАЛЬЦИЯ СО СТРУКТУРОЙ БРАУНМИЛЛЕРИТА
DOI: 10.6060/tcct.20165912.5495
2016, Т. 59, № 12, Стр. 45-48
ИССЛЕДОВАНИЕ ФИЗИКО-МЕХАНИЧЕСКИХ СВОЙСТВ ГИБРИДНЫХ АЛМАЗНО-ТВЕРДОСПЛАВНЫХ ПЛАСТИН, СПЕЧЕННЫХ С ИСПОЛЬЗОВАНИЕМ...
ИССЛЕДОВАНИЕ ФИЗИКО-МЕХАНИЧЕСКИХ СВОЙСТВ ГИБРИДНЫХ АЛМАЗНО-ТВЕРДОСПЛАВНЫХ ПЛАСТИН, СПЕЧЕННЫХ С ИСПОЛЬЗОВАНИЕМ МИКРОПОРОШКОВ АЛМАЗА ПОПИГАЙСКОГО МЕСТОРОЖДЕНИЯ
2015, Т. 58, № 7, Стр. 45-48