JP2011136894A - 誘電体磁器組成物および電子部品 - Google Patents
誘電体磁器組成物および電子部品 Download PDFInfo
- Publication number
- JP2011136894A JP2011136894A JP2010000183A JP2010000183A JP2011136894A JP 2011136894 A JP2011136894 A JP 2011136894A JP 2010000183 A JP2010000183 A JP 2010000183A JP 2010000183 A JP2010000183 A JP 2010000183A JP 2011136894 A JP2011136894 A JP 2011136894A
- Authority
- JP
- Japan
- Prior art keywords
- phase
- dielectric
- mol
- oxide
- main component
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/018—Dielectrics
- H01G4/06—Solid dielectrics
- H01G4/08—Inorganic dielectrics
- H01G4/12—Ceramic dielectrics
- H01G4/1209—Ceramic dielectrics characterised by the ceramic dielectric material
- H01G4/1218—Ceramic dielectrics characterised by the ceramic dielectric material based on titanium oxides or titanates
- H01G4/1227—Ceramic dielectrics characterised by the ceramic dielectric material based on titanium oxides or titanates based on alkaline earth titanates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/46—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates
- C04B35/462—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates
- C04B35/465—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on alkaline earth metal titanates
- C04B35/468—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on alkaline earth metal titanates based on barium titanates
- C04B35/4682—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on alkaline earth metal titanates based on barium titanates based on BaTiO3 perovskite phase
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
- C04B35/634—Polymers
- C04B35/63404—Polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B35/6342—Polyvinylacetals, e.g. polyvinylbutyral [PVB]
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/638—Removal thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/30—Stacked capacitors
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3201—Alkali metal oxides or oxide-forming salts thereof
- C04B2235/3203—Lithium oxide or oxide-forming salts thereof
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3208—Calcium oxide or oxide-forming salts thereof, e.g. lime
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3213—Strontium oxides or oxide-forming salts thereof
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3241—Chromium oxides, chromates, or oxide-forming salts thereof
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3244—Zirconium oxides, zirconates, hafnium oxides, hafnates, or oxide-forming salts thereof
- C04B2235/3248—Zirconates or hafnates, e.g. zircon
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3262—Manganese oxides, manganates, rhenium oxides or oxide-forming salts thereof, e.g. MnO
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3272—Iron oxides or oxide forming salts thereof, e.g. hematite, magnetite
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3275—Cobalt oxides, cobaltates or cobaltites or oxide forming salts thereof, e.g. bismuth cobaltate, zinc cobaltite
- C04B2235/3277—Co3O4
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3287—Germanium oxides, germanates or oxide forming salts thereof, e.g. copper germanate
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3409—Boron oxide, borates, boric acids, or oxide forming salts thereof, e.g. borax
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3418—Silicon oxide, silicic acids, or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6562—Heating rate
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/658—Atmosphere during thermal treatment
- C04B2235/6582—Hydrogen containing atmosphere
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/658—Atmosphere during thermal treatment
- C04B2235/6583—Oxygen containing atmosphere, e.g. with changing oxygen pressures
- C04B2235/6584—Oxygen containing atmosphere, e.g. with changing oxygen pressures at an oxygen percentage below that of air
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/658—Atmosphere during thermal treatment
- C04B2235/6588—Water vapor containing atmospheres
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/66—Specific sintering techniques, e.g. centrifugal sintering
- C04B2235/661—Multi-step sintering
- C04B2235/662—Annealing after sintering
- C04B2235/663—Oxidative annealing
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/80—Phases present in the sintered or melt-cast ceramic products other than the main phase
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
Abstract
【解決手段】BaTiO3、(Ba,Ca)TiO3、(Ba,Sr)TiO3および(Ba,Ca,Sr)TiO3から選ばれる1つからなる主成分、希土類元素の酸化物、およびBaを含む複合化合物を複合化合物換算で9〜13モル含有する誘電体磁器組成物であって、誘電体磁器組成物が、非拡散相とR元素が含まれる拡散相とからなる表面拡散構造を有する表面拡散粒子を有しており、表面拡散粒子において、非拡散相が占める面積をS1、拡散相が占める面積をS2とすると、S1:S2=20:80〜30:70(ただしS1=30およびS2=70を除く)であり、表面拡散粒子における前記R元素の平均濃度をCとした場合、4.8≦S2×C≦5.8である。
【選択図】図3
Description
BaTiO3、(Ba,Ca)TiO3、(Ba,Sr)TiO3および(Ba,Ca,Sr)TiO3から選ばれる1つからなる主成分と、
R元素の酸化物(ただし、R元素は、Sc、Y、La、Ce、Pr、Nd、Pm、Sm、Eu、Gd、Tb、Dy、Ho、Er、Tm、YbおよびLuから選ばれる少なくとも1つ)と、
Baを含む複合化合物と、を含有する誘電体磁器組成物であって、
前記主成分100モルに対して、前記Baを含む複合化合物が、複合化合物換算で9〜13モル含有され、
前記誘電体磁器組成物が、非拡散相と、前記非拡散相の周囲に存在し、少なくとも前記R元素が含まれる拡散相と、からなる表面拡散構造を有する表面拡散粒子を有しており、
前記表面拡散粒子において、前記非拡散相が占める面積をS1、前記拡散相が占める面積をS2とすると、S1:S2=20:80〜30:70(ただし、S1=30およびS2=70を除く)であり、
前記表面拡散粒子における前記R元素の平均濃度をCとした場合、4.8≦S2×C≦5.8であることを特徴とする。
誘電体層と電極層とを有する電子部品であって、
前記誘電体層が、上記のいずれかに記載の誘電体磁器組成物から構成されている。
図1に示すように、本発明の一実施形態に係る積層セラミックコンデンサ1は、誘電体層2と内部電極層3とが交互に積層された構成のコンデンサ素子本体10を有する。このコンデンサ素子本体10の両端部には、素子本体10の内部で交互に配置された内部電極層3と各々導通する一対の外部電極4が形成してある。コンデンサ素子本体10の形状に特に制限はないが、通常、直方体状とされる。また、その寸法にも特に制限はなく、用途に応じて適当な寸法とすればよい。
誘電体層2は、本発明の誘電体磁器組成物を含有する。本発明の誘電体磁器組成物は、BaTiO3、(Ba,Ca)TiO3、(Ba,Sr)TiO3および(Ba,Ca,Sr)TiO3から選ばれる1つからなる主成分と、Rの酸化物(ただし、RはY,La,Ce,Pr,Nd,Pm,Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,YbおよびLuから選ばれる少なくとも1つ)と、Baを含む複合化合物と、を有している。この際、酸素(O)量は、上記式の化学量論組成から若干偏倚してもよい。
本実施形態においては、上記の誘電体層2に含有される誘電体粒子のうち、少なくとも一部の粒子は、表面拡散構造を有する表面拡散粒子20となっている。表面拡散粒子20は、主成分粒子中にR元素やBaを含む複合化合物を構成する元素などが固溶(拡散)した粒子である。また、隣り合う粒子の間には結晶粒界が存在する。
図1に示す内部電極層3に含有される導電材は特に限定されないが、誘電体層2の構成材料が耐還元性を有するため、比較的安価な卑金属を用いることができる。導電材として用いる卑金属としては、NiまたはNi合金が好ましい。Ni合金としては、Mn,Cr,CoおよびAlから選択される1種以上の元素とNiとの合金が好ましく、合金中のNi含有量は95重量%以上であることが好ましい。なお、NiまたはNi合金中には、P等の各種微量成分が0.1重量%程度以下含まれていてもよい。また、内部電極層3は、市販の電極用ペーストを使用して形成してもよい。内部電極層3の厚さは用途等に応じて適宜決定すればよい。
図1に示す外部電極4に含有される導電材は特に限定されないが、本発明では安価なNi,Cuや、これらの合金を用いることができる。外部電極4の厚さは用途等に応じて適宜決定すればよい。
本実施形態の積層セラミックコンデンサ1は、従来の積層セラミックコンデンサと同様に、ペーストを用いた通常の印刷法やシート法によりグリーンチップを作製し、これを焼成した後、外部電極を印刷または転写して焼成することにより製造される。以下、製造方法について具体的に説明する。
まず、主成分の原料として、BaTiO3 粉末を、主成分以外の原料として、BaZrO3 、Gd2 O3 、MgCO3、MnOおよびSiO2を、それぞれ準備した。なお、MgCO3 は、焼成後には、MgOとして誘電体磁器組成物中に含有されることとなる。
まず、走査透過型電気顕微鏡(STEM)により無作為に抽出した50個の粒子を観察し、エネルギー分散型X線分光法により各表面拡散粒子の略中心を通る直線上で点分析を行って、Gd元素のX線スペクトルを測定した。得られたX線スペクトルから、該粒子におけるGd元素の平均濃度Cを算出した。
コンデンサ試料に対し、25℃において、デジタルLCRメータ(YHP社製4284A)にて、周波数1kHz、入力信号レベル(測定電圧)1Vrmsの信号を入力し、静電容量Cを測定した。そして、比誘電率εs(単位なし)を、誘電体層の厚みと、有効電極面積と、測定の結果得られた静電容量Cとに基づき算出した。本実施例では、10個のコンデンサ試料を用いて算出した値の平均値を比誘電率とした。比誘電率は高いほうが好ましく、評価基準は800以上を良好とした。結果を表1に示す。
コンデンサ試料に対し、140℃にて、50V/μmの電界下で直流電圧の印加状態に保持し、寿命時間を測定することにより、高温負荷寿命を評価した。本実施例においては、印加開始から絶縁抵抗が一桁落ちるまでの時間を寿命と定義した。また、この高温負荷寿命は、10個のコンデンサ試料について行った。評価基準は20時間以上を良好とした。結果を表1に示す。
静電容量の温度特性は、EIA規格のX7Tを満足するか否かを調べた。具体的には、LCRメータにより、温度−55〜125℃について測定電圧1.0Vrmsで容量を測定し、容量変化率が+22%〜−33%以内(基準温度25℃)を満足するか否かを調べた。本実施例では、125℃における容量変化率が−33%以上を良好とした。結果を表1に示す。
焼成時の昇温速度を表2に示す速度とした以外は、実施例1の試料番号4と同様にして、コンデンサ試料を作製し、実施例1と同様の評価を行った。結果を表2に示す。
Gdの組成量を変化させて、Gdの平均濃度を変化させた以外は、実施例1と同様にして、コンデンサ試料を作製し、実施例1と同様の評価を行った。結果を表3に示す。
10… コンデンサ素子本体
2… 誘電体層
20… 誘電体粒子
20a… 非拡散相
20b… 拡散相
3… 内部電極層
4… 外部電極
Claims (5)
- BaTiO3、(Ba,Ca)TiO3、(Ba,Sr)TiO3および(Ba,Ca,Sr)TiO3から選ばれる1つからなる主成分と、
R元素の酸化物(ただし、R元素は、Sc、Y、La、Ce、Pr、Nd、Pm、Sm、Eu、Gd、Tb、Dy、Ho、Er、Tm、YbおよびLuから選ばれる少なくとも1つ)と、
Baを含む複合化合物と、を含有する誘電体磁器組成物であって、
前記主成分100モルに対して、前記Baを含む複合化合物が、複合化合物換算で9〜13モル含有され、
前記誘電体磁器組成物が、非拡散相と、前記非拡散相の周囲に存在し、少なくとも前記R元素が含まれる拡散相と、からなる表面拡散構造を有する表面拡散粒子を有しており、
前記表面拡散粒子において、前記非拡散相が占める面積をS1、前記拡散相が占める面積をS2とすると、S1:S2=20:80〜30:70(ただし、S1=30およびS2=70を除く)であり、
前記表面拡散粒子における前記R元素の平均濃度をCとした場合、4.8≦S2×C≦5.8であることを特徴とする誘電体磁器組成物。 - 前記Baを含む複合化合物がジルコン酸バリウムである請求項1に記載の誘電体磁器組成物。
- 前記R元素の酸化物が、前記主成分100モルに対して、R2O3換算で、4.5〜5.5モル含有される請求項1または2に記載の誘電体磁器組成物。
- 前記主成分100モルに対して、Mgの酸化物がMgO換算で2.7〜5.7モル、Mn、Cr、CoおよびFeから選ばれる少なくとも1つの元素の酸化物がMnO、Cr2O3、Co3O4およびFe2O3換算で0.5〜1.5モル、Si、Al、Ge、BおよびLiから選ばれる少なくとも1つの元素の酸化物がSiO2、Al2O3、GeO2、B2O3およびLi2O換算で3.0〜3.9モル含有される請求項1〜3のいずれかに記載の誘電体磁器組成物。
- 誘電体層と電極層とを有する電子部品であって、
前記誘電体層が、請求項1〜4のいずれかに記載の誘電体磁器組成物から構成されている電子部品。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010000183A JP5446880B2 (ja) | 2010-01-04 | 2010-01-04 | 誘電体磁器組成物および電子部品 |
US12/978,950 US8450230B2 (en) | 2010-01-04 | 2010-12-27 | Dielectric ceramic composition and electronic component |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010000183A JP5446880B2 (ja) | 2010-01-04 | 2010-01-04 | 誘電体磁器組成物および電子部品 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2011136894A true JP2011136894A (ja) | 2011-07-14 |
JP5446880B2 JP5446880B2 (ja) | 2014-03-19 |
Family
ID=44224575
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2010000183A Active JP5446880B2 (ja) | 2010-01-04 | 2010-01-04 | 誘電体磁器組成物および電子部品 |
Country Status (2)
Country | Link |
---|---|
US (1) | US8450230B2 (ja) |
JP (1) | JP5446880B2 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013129560A (ja) * | 2011-12-21 | 2013-07-04 | Tdk Corp | 誘電体磁器組成物および電子部品 |
JP2017024969A (ja) * | 2015-07-16 | 2017-02-02 | 国立臺北科技大學 | セラミックコンデンサ誘電体材料 |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TW201124356A (en) * | 2010-01-15 | 2011-07-16 | Darfon Electronics Corp | Ceramic powder composition, ceramic material and laminated ceramic capacitor produced by the same. |
JP2012193072A (ja) * | 2011-03-16 | 2012-10-11 | Tdk Corp | 誘電体磁器組成物 |
JP5648744B2 (ja) * | 2011-06-22 | 2015-01-07 | 株式会社村田製作所 | 半導体セラミックコンデンサの製造方法 |
KR102064008B1 (ko) * | 2013-01-15 | 2020-02-17 | 삼성전기주식회사 | 적층 커패시터, 적층 커패시터가 실장된 기판 |
TWI537998B (zh) * | 2013-05-24 | 2016-06-11 | Murata Manufacturing Co | Laminated ceramic capacitors |
KR20220121024A (ko) * | 2021-02-24 | 2022-08-31 | 삼성전기주식회사 | 적층 세라믹 전자부품 |
KR20220158111A (ko) * | 2021-05-20 | 2022-11-30 | 주식회사 아모텍 | 적층 세라믹 커패시터용 유전체 조성물, 이를 포함하는 적층 세라믹 커패시터 및 이의 제조방법 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006199563A (ja) * | 2005-01-24 | 2006-08-03 | Murata Mfg Co Ltd | 誘電体セラミックおよびその製造方法、ならびに積層セラミックコンデンサ |
JP2008222520A (ja) * | 2007-03-14 | 2008-09-25 | Tdk Corp | 誘電体磁器組成物および電子部品 |
JP2008247657A (ja) * | 2007-03-29 | 2008-10-16 | Tdk Corp | 誘電体磁器組成物および電子部品 |
JP2009161417A (ja) * | 2008-01-10 | 2009-07-23 | Tdk Corp | 誘電体磁器組成物および電子部品 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000223351A (ja) | 1999-01-28 | 2000-08-11 | Murata Mfg Co Ltd | 積層セラミックコンデンサ |
JP4201242B2 (ja) * | 2002-03-26 | 2008-12-24 | Tdk株式会社 | 高誘電率誘電体磁器組成物 |
JP5078307B2 (ja) | 2006-09-27 | 2012-11-21 | 京セラ株式会社 | 誘電体磁器およびその製法、ならびにコンデンサ |
JP4863007B2 (ja) | 2007-01-23 | 2012-01-25 | Tdk株式会社 | 誘電体磁器組成物および電子部品 |
TW200839814A (en) * | 2007-03-14 | 2008-10-01 | Tdk Corp | Dielectric ceramic composition and electronic device |
-
2010
- 2010-01-04 JP JP2010000183A patent/JP5446880B2/ja active Active
- 2010-12-27 US US12/978,950 patent/US8450230B2/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006199563A (ja) * | 2005-01-24 | 2006-08-03 | Murata Mfg Co Ltd | 誘電体セラミックおよびその製造方法、ならびに積層セラミックコンデンサ |
JP2008222520A (ja) * | 2007-03-14 | 2008-09-25 | Tdk Corp | 誘電体磁器組成物および電子部品 |
JP2008247657A (ja) * | 2007-03-29 | 2008-10-16 | Tdk Corp | 誘電体磁器組成物および電子部品 |
JP2009161417A (ja) * | 2008-01-10 | 2009-07-23 | Tdk Corp | 誘電体磁器組成物および電子部品 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013129560A (ja) * | 2011-12-21 | 2013-07-04 | Tdk Corp | 誘電体磁器組成物および電子部品 |
JP2017024969A (ja) * | 2015-07-16 | 2017-02-02 | 国立臺北科技大學 | セラミックコンデンサ誘電体材料 |
Also Published As
Publication number | Publication date |
---|---|
JP5446880B2 (ja) | 2014-03-19 |
US8450230B2 (en) | 2013-05-28 |
US20110164346A1 (en) | 2011-07-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4858248B2 (ja) | 誘電体磁器組成物および電子部品 | |
JP4967963B2 (ja) | 誘電体磁器組成物および電子部品 | |
JP5217405B2 (ja) | 誘電体磁器組成物および電子部品 | |
JP5446880B2 (ja) | 誘電体磁器組成物および電子部品 | |
JP5434407B2 (ja) | セラミック電子部品およびその製造方法 | |
JP6696266B2 (ja) | 誘電体磁器組成物および積層セラミックコンデンサ | |
JP5034839B2 (ja) | 誘電体磁器組成物および電子部品 | |
JP2017178684A (ja) | 誘電体磁器組成物および積層セラミックコンデンサ | |
JP2019131438A (ja) | 誘電体磁器組成物および積層セラミックコンデンサ | |
JP2009084112A (ja) | 誘電体磁器組成物および電子部品 | |
JP4710908B2 (ja) | 誘電体磁器組成物および電子部品 | |
JP6696267B2 (ja) | 誘電体磁器組成物および積層セラミックコンデンサ | |
JP4863005B2 (ja) | 誘電体磁器組成物および電子部品 | |
JP5067572B2 (ja) | 誘電体磁器組成物 | |
JP2008247657A (ja) | 誘電体磁器組成物および電子部品 | |
JP2013211398A (ja) | 積層セラミックコンデンサ | |
JP4863007B2 (ja) | 誘電体磁器組成物および電子部品 | |
JP4910812B2 (ja) | 誘電体磁器組成物および電子部品 | |
JP2007055835A (ja) | 誘電体磁器組成物および電子部品 | |
JP5488118B2 (ja) | 誘電体磁器組成物および電子部品 | |
JP5803694B2 (ja) | 誘電体磁器組成物およびセラミック電子部品 | |
JP5023748B2 (ja) | 誘電体磁器組成物および電子部品 | |
JP5061961B2 (ja) | 誘電体磁器組成物 | |
JP2008174434A (ja) | 誘電体磁器組成物および電子部品 | |
JP5067531B2 (ja) | 誘電体磁器組成物および電子部品 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20120823 |
|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20130816 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20130820 |
|
RD02 | Notification of acceptance of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7422 Effective date: 20131018 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20131203 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20131216 |
|
R150 | Certificate of patent or registration of utility model |
Ref document number: 5446880 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 Free format text: JAPANESE INTERMEDIATE CODE: R150 |