Browse Prior Art Database

Ferrite Core Processing

IP.com Disclosure Number: IPCOM000098613D
Original Publication Date: 1959-Jun-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Morris, GH: AUTHOR

Abstract

Soaking ferrite memory cores in a dilute aqueous solution of hydrofloric acid before sintering improves the squareness of hysteresis loop, reduces the switching time and increases the percentage yield of acceptable cores.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 1

Ferrite Core Processing

Soaking ferrite memory cores in a dilute aqueous solution of hydrofloric acid before sintering improves the squareness of hysteresis loop, reduces the switching time and increases the percentage yield of acceptable cores.

The process involves all of the normal steps of producing ferrite memory cores from manganese ferrite materials including various additives such as copper, nickel, chromium, etc., and includes the step of soaking the green pressed cores in a dilute aqueous solution of hydrofloric acid after a binder and lubricant drive-off heating cycle. After soaking for approximately fifteen minutes, the wet cores are introduced into a furnace and subjected to a conventional sintering cycle. The time and temperature involved in the sintering is dependent upon the particular materials employed in the core and upon the particular properties desired in the sintered core.

1