00000nam 2200000za 4500 9.840780 CaOODSP 20221107151927 cr ||||||||||| 170801s1970 oncad ob f000 0 eng d CaOODSP eng n-cn--- M38-8/97E-PDF M38-8/97 Smith, E. The application of dark-field electron miroscopy to the determination of crystallite size in ferrites [electronic resource] / E. Smith, Physical Metallurgy Division ; Sutarno, Mineral Sciences Division. Ottawa : Queen's Printer, 1970. p. lix-lxi : charts, ill. Reprint series ; RS 97 Cover title. "Reprinted from the Canadian Ceramic Society, (1969), vol. 38, pp. 9-13." Historical publication digitized from print 2017 [by Natural Resources Canada]. Includes bibliographical references. "Barium and strontium ferrites were prepared by coprecipitation from nitrate solutions, filtering and calcining at 1100°C or 1300°C. The calcined powders were ground in a steel mortar. A method was developed for supporting the powders in thin plastic films for electron microscopy. Powders were examined by electron microscopy in bright and dark fields, and by electron diffraction. Three types of particle in the micron range of size were found, two being monocrystalline and one finely polycrystalline with a crystallite size of about 500Â. It was not possible to distinguish between these particles without the use of electron diffraction. It was found that the grains of the barium ferrites were generally smaller than those of the strontium ferrites prepared under similar conditions, and that the grain sizes of both increased with calcining temperature"--Abstract, p. lxi. gccst Ceramics Sutarno, R. Canada. Natural Resources Canada. Canada. Department of Energy, Mines and Resources. Canada. Mines Branch. Reprint series - Dept. of Energy, Mines and Resources, Mines Branch ; RS 97 (CaOODSP)9.834843 PDF 1.99 MB https://publications.gc.ca/collections/collection_2017/rncan-nrcan/M38-8/M38-8-97-eng.pdf 300176