00000nam 2200000za 4500 9.841228 CaOODSP 20221107152033 cr ||||||||||| 170808s1966 oncad ob f000 0 eng d CaOODSP eng eng fre n-cn--- M34-20/84E-PDF M34-20/84 Ahmed, S. M. (Syed M.), 1943- Measurement of the surface areas of powders by krypton gas adsorption method [electronic resource] : construction and operation of the apparatus / Syed M. Ahmed, Mineral Sciences Division. Ottawa : Queen's Printer, 1966. iv, 26 p. : charts, ill. Technical bulletin ; TB 84 Cover title. "July 1966." Digitized edition from print [produced by Natural Resources Canada]. Includes bibliographical references (p. 11). “An apparatus has been constructed for studying the adsorption of Kr on finely divided materials of low as well as high specific surface areas, in the low pressure range, < 1 mmHg, at -196 °C. The apparatus is designed to handle four samples at a time. The use of a thermistor in measuring the low pressures to a high accuracy is found to offer several advantages over the conventional methods of measuring pressures. The adsorption isotherms have been used to calculate the specific surface areas of powders by the B.E.T. method. The applicability of the Harkins-Jura equation for the determination of the surface areas has also been investigated"--Abstract, p. i. Includes abstract in French. gccst Measurement gccst Equipment Canada. Natural Resources Canada. Canada. Mines Branch. Technical bulletin (Canada. Dept. of Energy, Mines and Resources. Mines Branch) TB 84 (CaOODSP)9.834857 PDF 2.19 MB https://publications.gc.ca/collections/collection_2017/rncan-nrcan/M34-20/M34-20-84-eng.pdf 299970