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引言磁粉重量浓度(PWC)与磁粉体积浓度(PVC)都可表示磁带磁层中磁粉的含量。PWG的优点是使用简单方便,缺点是不能揭示不同浓度下磁层结构的递变规律;PVC的优点恰恰在于可以确切反映磁层内
Introduction Both PWC and PVC indicate the amount of magnetic particles in the magnetic layer of the tape. The advantage of PWG is to use simple and convenient, the disadvantage is that it can not reveal the gradual change of the magnetic layer structure under different concentrations; the advantage of PVC precisely lies in the magnetic layer