Patent ID: 6627103
Filing Date: 2003-09-30
Classification: C01G,C01P,C04B

Abstract:
An Mnâ€”Zn ferrite production process comprising a maximum temperature holding step for firing and a cooling step in a nitrogen atmosphere, wherein:a nitrogen atmosphere changeover temperature T in said cooling step is below 1,1500Â° C. and equal to or higher than 1,0000Â° C., and a cooling rate V1 conforms to a condition defined by the following formula (1): T&lE;(V1+1,450)/1.5â€ƒâ€ƒ(1) where T is the nitrogen atmosphere changeover temperature in Â° C. and V1 is the cooling rate in Â° C./hour from T down to 900Â° C.