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钡铁氧体磁粉已被用来试制各种磁记录介质。特别是在8mm录象磁带、高容量软磁盘和R-DAT数字录音盒式磁带方面的应用开发十分引人注目。在这些应用中,钡铁氧体介质已显示出它对金属粉涂层和薄膜金属涂层材料的强的竞争力。最吸引人的是它可沿用现在的配方、分散设备和涂布装置进行生产,以及这种介质具有潜在的使用特性。钡铁氧体是六角型晶体结构,分子式为BaFe_(12)O_(19)。它具有强的单轴各向异性,易磁化方向为C晶轴,矫顽力主要取决于磁晶各向异性,内禀矫顽力约为7,000Oe,比饱和磁化强度约72emu/g,密度为5.33g/cm~3,居里温度为450℃,电阻率为10~8Ω。
Barium ferrite magnetic powder has been used to trial a variety of magnetic recording media. In particular, 8mm video tape, high-capacity floppy disk and R-DAT digital recording cassette tape application development is very compelling. In these applications, barium ferrite media has shown its strong competitiveness in metal powder coating and thin film metal coating materials. Most attractive is that it can be produced using current formulations, dispensing equipment and coating equipment, and has the potential to be used for such media. Barium ferrite hexagonal crystal structure, molecular formula BaFe_ (12) O_ (19). It has a strong uniaxial anisotropy, the direction of easy magnetization C crystal axis, coercivity mainly depends on the magnetocrystalline anisotropy, intrinsic coercivity of about 7,000Oe, than the saturation magnetization of about 72emu / g, the density 5.33g / cm ~ 3, Curie temperature is 450 ℃ and resistivity is 10 ~ 8Ω.