Metal tapes using ultra fine powder prepared by gas evaporation method

摘要: In the last decade, investigations of ultrafine powders prepared by gas evaporation method have been carried out in Japan. Metals were evaporated inert gases such as Xe or He Ar. Ultra fine particles 50 to 2000 A diameter precipitated like soot. The basic magnetic charcterstics already reported previous papers. coercive force ferromagnetic can be controlled changing constituents alloy up 2500 Oe. Resistance heating, plasma jet, induction heating LASER examined heat sources. Viedo and Audio tapes tested Fuji Photo Film Co.,Ltd.. One typical gave 12.8 dB higher output level at 5 MHz 10.0 better C/N 4.5 compared with commercially available highest quality tape. Reduction saturation magnetization tape is 0% after being kept condition that 60°c, 90% R.H. for one week. Still frame more than 30 minutes.