Method of producing a powder, powder, and multilayered...

Details Method of producing a powder, powder, and multilayered... Method of producing a powder, powder, and multilayered...

2006-03-21

2010-06-29

Cleveland, Michael (Department: 1792)

Coating processes

Particles, flakes, or granules coated or encapsulated

C075S343000

Reexamination Certificate

active

07744954

ABSTRACT:
A core/shell structured powder different in composition between the inside the particle and the surface thereof before sintering, so that it is possible to sinter the powder at lower temperature and give a core/shell structured powder having a shell portion uniform in thickness after sintering; a multilayered ceramic capacitor having a longer lifetime, by preparing the multilayered ceramic capacitor by using a powder having a core/shell structure different in composition between the inside the particle and the surface thereof before sintering; and a method of producing a powder by synthesizing particles in the liquid containing a raw material, wherein particles different in composition at least between the inside the particle and the surface thereof are obtained by adding a composition to be incorporated as a component of the particles to the liquid during the synthetic process so that the composition of the liquid changes continuously or intermittently.

REFERENCES:
patent: 4832939 (1989-05-01), Menashi et al.
patent: 6548437 (2003-04-01), Sato et al.
patent: 2002/0016249 (2002-02-01), Saito et al.
patent: 1331476 (2002-01-01), None
patent: 10-310469 (1998-11-01), None
“Barium Titanate Ceramics”, In Dictionary of Chemical Technology, Chemical Industry Press, 4thEdition, Aug. 2000, p. 900.

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