Abstract
The preparation of high density MnZn ferrite by hot isostatic press (HIP) is investigated.
The procedures contain the first sintering, hot isostatic press (at 1200°C) and annealing, and the porosity of this HIP ferrite is less than 0.2%. Densification mechanism maybe grain growth and compression of pore by isostatic pressure. Magnetic characteristics of HIP ferrite are those of IIMHz: 1800, μ5MHz: 1040, Bio: 5000G, Hc: 0.06Oe and Tc: 220°C.
This ferrite will be suitable for high density recording magnetic head materials.
