METHOD OF ELECTROCHEMICAL DETERMINATION OF ACID-ALKALI SURFACE PROPERTIES OF IRON GAMMA-OXIDE BASE MAGNETIC POWDERS

摘要

the invention u043eu0442u043du043eu0441u0438u0442u0441u00a0 to analytical chemistry and physical chemistry of solid body, namely, the evaluation of the physical and chemical characteristics of the surface of the magnetic powders based on the iron oxide, and can find application in analytical practice in assessing the quality of powdery materials in chemical, metallurgical, farm u0430u0446u0435u0432u0442u0438u0447u0435u0441u043au043eu0439, electronic industry.purpose u0438u0437u043eu0431u0440u0435u0442u0435u043du0438u00a0 u00a0u0432u043bu00a0u0435u0442u0441u00a0 acceleration analysis and improvement of technology, the u0434u043eu0441u0442u0438u0433u0430u0435u0442u0441u00a0 u043fu043eu0441u0442u0430u0432u043bu0435u043du043du0430u00a0 so that consistent u0438u0437u043cu0435u0440u0435u043du0438u00a0 pHs crossing p u043eu0432u0435u0440u0445u043du043eu0441u0442u0438 oxide powders with water solutions of acids u043fu0440u043eu0432u043eu0434u00a0u0442 u043du0435u0431u0443u0444u0435u0440u043du044bu043cu0438 background in u0437u043du0430u0447u0435u043du0438u00a0u0445 ph from 4.5 to 7.5, as well as solutions of caustic alkalis (NaOH, con) p ri u0437u043du0430u0447u0435u043du0438u00a0u0445 u0440u043d0 from 7.0 to 12.0.the end result, the value of acidity (u043eu0441u043du043eu0432u043du043eu0441u0442u0438) surface of the powder pHs & deg; u043eu043fu0440u0435u0434u0435u043bu00a0u044eu0442 on the u043fu0435u0440u0435u0441u0435u0447u0435u043du0438u00a0 schedule ApHs pHs - pH0 (f / pH0 with the axis of u0440u043du043e. 2, table 2). with with