Synthesis of nanoparticles of strontium hexaferrite by co precipitation method from homogeneous solutions

摘要

the invention relates to the synthesis of nanoparticles of strontium heksaferita (srfe12o19) with the method soobarjanja from homogeneous solutions, with a narrow size distribution in the range of 40 to 100 nm, the thermal treatment in the temperature range between nanoparticles synthesised 600 degrees c and 1100 degrees c t er specific magnetizacijo sigma - in the area between 64 and 67 am2 / kg,remanentno magnetizacijo mri in the range between 6 and 39 am2 / kg and koercitivnostjo in the range between 150 and 5400 oe, the precipitation of water obarjanjavodnih solutions of sulfates, chlorides and nitrates sr2 + metal ions, fe2 +, fe3 + with aqueous solutions of alkali obarjalnih reagents nh4oh, naoh, na2co3, co (nh2) 2 and (c4h13no), at ph values in the range between 7 and 14.in the temperature range between 20 degrees c and 30 degrees c, and the time to maximum temperature restraint from 30 to 120 minutes, the technology of surface treatment of nanoparticles synthesised with water solution of ethanol in a ratio of 1: 1.the technology of drying surface treated nanoparticles in temperaturnemobmou010dju from 100 degrees c to 120 degrees c and the maximum temperature restraint time of 120 minutes to 480 minutes and technology of heat treatment surface treatment of nanoparticles in the temperature range from 400 degrees c, d about 1100 degrees c in air atmosphere by keeping the peak temperature in the range from 60 to 360 minutes of menut adapted to conditions of unwanted and harmful electromagnetic radiation in the area of health milimetrskem electromagnetic waves at different podrou010djihelektrotehnike, construction and in the field of ecology and environmental protection.