Microwave ferrites with narrow resonance linewidths, good temperature performance, low losses, low costs, and rectangular hysteresis loops are made from a lithium-titanium ferrite containing a small amount of zinc. In addition, small amounts of copper or manganese can be present in the ferrites.
To a ferrite composition of ferric oxide and divalent metal oxides are added 0.01-5.0 mol % of Li.sub.2 O and 0.01-0.5 mol % of TiO.sub.2, SnO.sub.2, and/or GeO.sub.2. The ferrite has sufficiently high density, mechanical strength and electromagnetic properties even when it is sintered at a relatively low temperature of up to 950.degree. C.
