Ceramic dielectric compositions and method for enhancing dielectric properties
First Claim
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1. A process for preparing a ceramic dielectric composition having a chemically homogeneous coating of secondary metal oxide or hydrous metal oxide components on the surface of a primary ceramic particle component comprising the steps of:
- (a) adding a stable solution of metal chelates to a slurry of fine particle of primary ceramic component with an aqueous solvent with agitation;
(b) adding a strong base to said slurry with metal chelates of step (a) while maintaining a sufficient temperature for a sufficient time to decompose said metal chelates and to deposit a homogeneous coating of secondary metal oxide or hydrous metal oxides components on the surface of the primary ceramic particle component; and
(c) recovering an washing the homogeneously coated particles.
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Abstract
An improved ceramic dielectric composition comprising a plurality of mixed metal oxide dopants distributed homogeneously on the surface of ceramic powder particles, and a method for enhancing dielectric properties of such compositions by improving the chemical homogeneity of the particles.
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16 Claims
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1. A process for preparing a ceramic dielectric composition having a chemically homogeneous coating of secondary metal oxide or hydrous metal oxide components on the surface of a primary ceramic particle component comprising the steps of:
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(a) adding a stable solution of metal chelates to a slurry of fine particle of primary ceramic component with an aqueous solvent with agitation; (b) adding a strong base to said slurry with metal chelates of step (a) while maintaining a sufficient temperature for a sufficient time to decompose said metal chelates and to deposit a homogeneous coating of secondary metal oxide or hydrous metal oxides components on the surface of the primary ceramic particle component; and (c) recovering an washing the homogeneously coated particles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16)
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14. A process for preparing dielectric powder compositions comprising particles of ceramic powder by distributing a mixture of secondary metal oxide or hydrous metal oxide components surface of the particles to form a chemically homogeneous coating layer.
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