| 简介 |
A ferrite sintered magnet which has M-type ferrite structure and contains as the essential elements Ca, an R element component which consist of at least one rare earth element and contains La as the essential component, an A element component consisting of Ba and/or Sr, Fe, and Co and which has a composition represented by the general formula : Ca1-x-yRxAyFe2n-zCoz (in terms of atomic ratio) [wherein (1-x-y), x, y, z and n are contents and molar ratios of Ca, R element component, A element component, and Co, respectively and satisfy the relationships : 0.3y and 1-x-y>x>z>y]; a process for the production of the magnet; a calcined body having a composition as represented by the above general formula wherein (1-x-y), x, y, z and n satisfy the relationships : 0.3y, 1-x-y>z>y, and x>z>y; and a process for the production of the body. |
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