MANUFACTURING METHOD OF ITEMS FROM FERRITE MATERIAL FOR INTEGRAL MICROWAVE DEVICES Russian patent published in 2011 - IPC H01F1/34 

FIELD: electricity.

SUBSTANCE: method involves preparation of charge on the basis of oxides of the above ferrite material and temporary binding agent representing water solution of polyvinyl alcohol and methyl cellulose at their specified ratio, pressing of workpieces from charge, sintering at the specified speed of temperature rise and reduction, cutting, grinding, finishing of items, metal coating of the specified surfaces of items. Prior to finishing of items, high-temperature annealing is performed at sintering temperature of ferrite material, at oxygen pressure above equilibrium pressure, which is equal to 0.1×10⁵-1.0×10⁵ kPa, during 30-60 min, and metal coating of the specified surfaces of items is performed with thickness of metallisated coating equal to 3-7 mcm.

EFFECT: improving reliability and yield ratio of items, reducing tangent of angle of total dielectric and magnetic losses, improving reliability and durability of integral microwave devices.

3 cl, 1 tbl, 5 ex