| 摘要 |
Ferromagnetic storage cores and a process of making the same wherein the cores are composed of 3.5 to 15 mol percent of ZnO, 10 to 16 mol percent of LiO2 and 70 to 81 mol percent of Fe2O3 and exhibit a rectangular hysteresis loop with a Rs of more than 0.7 over a broad operating temperature range without current readjustment. The process comprises presintering the core material in a nitrogen atmosphere, then initially sintering in an oxygen atmosphere, continuing sintering in the oxygen atmosphere at an elevated temperature, initially cooling the sintered materials and finally cooling the materials to ambient temperatures.
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