Sintered ceramic components and method for making same

Details Sintered ceramic components and method for making same Sintered ceramic components and method for making same

1992-12-08

1995-02-14

Turner, Archene

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

365122, 428472, 428697, 428699, 428701, 428702, 428900, H01F 4102

Patent

active

053894286

ABSTRACT:
This invention is predicated upon applicants' discovery that conventional techniques for minimizing metal loss from sintered ceramic materials are not adequate in the fabrication of small ceramic components such as multilayer monolithic magnetic devices wherein a magnetic core is substantially surrounded by an insulating housing. Applicants have determined that this metal loss problem can be solved by providing the component with a housing layer having an appropriate concentration of metal. Specifically, if the insulating housing material around the magnetic core has, during the high temperature firing, the same partial pressure of metal as the magnetic core material, there is no net loss of metal from the core. In a preferred embodiment, loss of zinc from a MnZn ferrite core is compensated by providing a housing of NiZn ferrite or zinc aluminate with appropriate Zn concentrations. Similar considerations apply to other ceramic components.

REFERENCES:
patent: 4388131 (1983-06-01), Unger et al.
patent: 4841399 (1989-06-01), Kitada et al.
patent: 4901179 (1990-02-01), Satomi et al.
patent: 5097391 (1992-03-01), Nomura et al.

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