US5006956A
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Dielectric ceramic composition
Assignee: Panasonic Holdings Corp
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Filing: 1989-11-07
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Granted: 1991-04-09
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Expires: 2009-11-07
Abstract
Abstract A dielectric ceramic composition exhibiting a high dielectric constant, capable of sintering in a short time, at a sintering temperature of 800° to 1000° C., in the atmosphere, a neutral atmosphere or a reducing atmosphere. The dielectric ceramic composition comprises a main ceramic component represented by the formula PbTi x (Mg 1/3 Nb 2/3 ) y (Ni 1/2 W 1/2 ) z O 3 , wherein x+y+z=1, and subsidiary components of PbO is added in an amount of 1.0 to 25.0 mol % and NiO or WO 3 in an amount of 1.0 to 15.0 mol %. The subsidiary components are added to the calcined powder of the main component. Also provided is a dielectric ceramic composition comprising a main ceramic component represented by the formula PbZr x (Ni 1/3 Nb 2/3 ) y (Ni 1/2 W 1/2 ) z O 3 , wherein x+y+z=1, and subsidiary components of PbO in an amount of 1.0 to 25.0 mol % and NiO in an amount of 1.0 to 15.0 mol %. The subsidiary components are added to the calcined powder of the main component. The dielectric ceramic compositions are useful in preparing laminate ceramic capacitors and thick film capacitors.
Inventors
- 👤 Kouji Kawakita
- 👤 Suzushi Kimura
- 👤 Hideyuki Orinaka
- 👤 Youichiro Yokotani
- 👤 Mariko Ishikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:22
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/472; C04B35/495; C04B35/497; C04B35/499; H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/08; H01G4/12; H01G4/1209; H01G4/1254
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
128 words
A dielectric ceramic composition consisting essentially of a principal component represented by the formula PbTi.sub.x (Mg.sub.1/3 Nb.sub.2/3).sub.y (Ni.sub.1/2 W.sub.1/2).sub.z O.sub.3 wherein X+y+z=1, and substantially components of PbO in an amount of 1.0 to 25.0 mol % and NiO or WO 3 in an amount of 1.0 to 15.0 mol %, wherein said subsidiary components are added to a calcined powder of said principal component, and wherein the values of x, y and z fall within ranges represented by a polygon ABCDE of a ternary system composition diagram of PbTi x (Mg 1/3 Nb 2/3 ) y (Ni 1/2 W 1/2 ) z O 3 , such that the vertices of the polygon corresponding to compositions A, B, C, D, E are represented by the following numerical values: ##EQU5##
Claim 2
Dependent Claim
128 words
A dielectric ceramic composition consisting essentially of a principal component represented by the formula PbTi.sub.x (Mg.sub.1/3 Nb.sub.2/3).sub.y (Ni.sub.1/2 W.sub.1/2).sub.z O.sub.3 wherein X+y+z=1, and substantially components of PbO in an amount of 1.0 to 25.0 mol % and NiO or WO 3 in an amount of 1.0 to 15.0 mol %, wherein said subsidiary components are added to a calcined powder of said principal component, and wherein the values of x, y and z fall within ranges represented by a polygon ABCDE of a ternary system composition diagram of PbTi x (Mg 1/3 Nb 2/3 ) y (Ni 1/2 W 1/2 ) z O 3 , such that the vertices of the polygon corresponding to compositions A, B, C, D, E are represented by the following numerical values: ##EQU5##
Claim 3
Dependent Claim
42 words
A dielectric ceramic composition of claim 11, wherein PbO is added in an amount of 1.0 to 25.0 mol % and WO 3 is added in an amount of 1.0 to 15.0 mol % to the calcined powder of said principal component.
Claim 4
Dependent Claim
147 words
A ceramic capacitor composed of: a dielectric ceramic composition consisting essentially of a principal component represented by the formula PbTi.sub.x (Mg.sub.1/3 Nb.sub.2/3).sub.y (Ni.sub.1/2 W.sub.1/2).sub.z O.sub.3 wherein x+y+z=1, and subsidiary components of PbO in an amount of 1.0 to 25.0 mol % and NiO or WO 3 in an amount of 1.0 to 15.0 mol %, wherein said subsidiary components are added to a calcined powder of said principal component, and wherein the values of x, y and z fall within ranges represented by a polygon ABCDE of a ternary system composition diagram of PbTi x (Mg 1/3 Nb 2/3 ) y (Ni 1/2 W 1/2 ) z O 3 , such that the vertices of the polygon corresponding to compositions A, B, C, D, E are represented by the following numerical values ##EQU6## and electrodes that can be sintered at 800° to 1000° C. in the atmosphere.
Claim 5
Dependent Claim
147 words
A ceramic capacitor composed of: a dielectric ceramic composition consisting essentially of a principal component represented by the formula PbTi.sub.x (Mg.sub.1/3 Nb.sub.2/3).sub.y (Ni.sub.1/2 W.sub.1/2).sub.z O.sub.3 wherein x+y+z=1, and subsidiary components of PbO in an amount of 1.0 to 25.0 mol % and NiO or WO 3 in an amount of 1.0 to 15.0 mol %, wherein said subsidiary components are added to a calcined powder of said principal component, and wherein the values of x, y and z fall within ranges represented by a polygon ABCDE of a ternary system composition diagram of PbTi x (Mg 1/3 Nb 2/3 ) y (Ni 1/2 W 1/2 ) z O 3 , such that the vertices of the polygon corresponding to compositions A, B, C, D, E are represented by the following numerical values ##EQU6## and electrodes that can be sintered at 800° to 1000° C. in the atmosphere.
Claim 6
Dependent Claim
152 words
A ceramic capacitor composed of: a dielectric ceramic composition consisting essentially of a principal component represented by the formula PbTi.sub.x (Mg.sub.1/3 Nb.sub.2/3).sub.y (Ni.sub.1/2 W.sub.1/2).sub.z O.sub.3 wherein x+y+z=1, and subsidiary components of PbO in an amount of 1.0 to 25.0 mol % and NiO or WO 3 in an amount of 1.0 to 15.0 mol %, wherein said subsidiary components are added to a calcined powder of said principal component, and wherein the values of x, y and z fall within ranges represented by a polygon ABCDE of a ternary system composition diagram of PbTi x (Mg 1/3 Nb 2/3 ) y (Ni 1/2 W 1/2 ) z O 3 , such that the vertices of the polygon corresponding to compositions A, B, C, D, E are represented by the following numerical values ##EQU7## and electrodes that can be sintered at 800° to 1000° C. in a neutral atmosphere or a reducing atmosphere.
Claim 7
Dependent Claim
152 words
A ceramic capacitor composed of: a dielectric ceramic composition consisting essentially of a principal component represented by the formula PbTi.sub.x (Mg.sub.1/3 Nb.sub.2/3).sub.y (Ni.sub.1/2 W.sub.1/2).sub.z O.sub.3 wherein x+y+z=1, and subsidiary components of PbO in an amount of 1.0 to 25.0 mol % and NiO or WO 3 in an amount of 1.0 to 15.0 mol %, wherein said subsidiary components are added to a calcined powder of said principal component, and wherein the values of x, y and z fall within ranges represented by a polygon ABCDE of a ternary system composition diagram of PbTi x (Mg 1/3 Nb 2/3 ) y (Ni 1/2 W 1/2 ) z O 3 , such that the vertices of the polygon corresponding to compositions A, B, C, D, E are represented by the following numerical values ##EQU7## and electrodes that can be sintered at 800° to 1000° C. in a neutral atmosphere or a reducing atmosphere.
Claim 8
Dependent Claim
159 words
A thick film capacitor composed by disposing a dielectric layer made of a dielectric ceramic composition and electrodes that can be sintered at 800° to 1000° C. on a ceramic substrate, said dielectric ceramic composition consisting essentially of a principal component represented by the formula PbTi.sub.x (Mg.sub.1/3 Nb.sub.2/3).sub.y (Ni.sub.1/2 W.sub.1/2).sub.z O.sub.3 wherein x+y+z=1, and subsidiary components of PbO in an amount of 1.0 to 25.0 mol % and NiO or WO 3 in an amount of 1.0 to 15.0 mol %, wherein said subsidiary components are added to a calcined powder of said principal component, and wherein the values of x, y and z fall within ranges represented by a polygon ABCDE of a ternary system composition diagram of PbTi x (Mg 1/3 Nb 2/3 ) y (Ni 1/2 W 1/2 ) z O 3 , such that the vertices of the polygon corresponding to compositions A, B, C, D, E are represented by the following numerical values ##EQU8##
Claim 9
Dependent Claim
159 words
A thick film capacitor composed by disposing a dielectric layer made of a dielectric ceramic composition and electrodes that can be sintered at 800° to 1000° C. on a ceramic substrate, said dielectric ceramic composition consisting essentially of a principal component represented by the formula PbTi.sub.x (Mg.sub.1/3 Nb.sub.2/3).sub.y (Ni.sub.1/2 W.sub.1/2).sub.z O.sub.3 wherein x+y+z=1, and subsidiary components of PbO in an amount of 1.0 to 25.0 mol % and NiO or WO 3 in an amount of 1.0 to 15.0 mol %, wherein said subsidiary components are added to a calcined powder of said principal component, and wherein the values of x, y and z fall within ranges represented by a polygon ABCDE of a ternary system composition diagram of PbTi x (Mg 1/3 Nb 2/3 ) y (Ni 1/2 W 1/2 ) z O 3 , such that the vertices of the polygon corresponding to compositions A, B, C, D, E are represented by the following numerical values ##EQU8##
References Cited (Backward Citations)
US4711862A
Cited
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