JP4326346B2 - マイクロ波誘電体セラミック組成物、その製造方法及び当該組成物からなるデバイス - Google Patents
マイクロ波誘電体セラミック組成物、その製造方法及び当該組成物からなるデバイス Download PDFInfo
- Publication number
- JP4326346B2 JP4326346B2 JP2003578297A JP2003578297A JP4326346B2 JP 4326346 B2 JP4326346 B2 JP 4326346B2 JP 2003578297 A JP2003578297 A JP 2003578297A JP 2003578297 A JP2003578297 A JP 2003578297A JP 4326346 B2 JP4326346 B2 JP 4326346B2
- Authority
- JP
- Japan
- Prior art keywords
- dielectric
- microwave
- ceramic composition
- composition
- composition according
- 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.)
- Expired - Fee Related
Links
Images
Classifications
-
- 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
-
- 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
-
- 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
- C04B35/47—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 strontium 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
- C04B35/50—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on rare-earth compounds
-
- 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
- C04B35/62605—Treating the starting powders individually or as mixtures
- C04B35/6261—Milling
- C04B35/6262—Milling of calcined, sintered clinker or ceramics
-
- 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
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3232—Titanium oxides or titanates, e.g. rutile or anatase
-
- 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
-
- 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
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/74—Physical characteristics
- C04B2235/76—Crystal structural characteristics, e.g. symmetry
-
- 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
- C04B2235/74—Physical characteristics
- C04B2235/76—Crystal structural characteristics, e.g. symmetry
- C04B2235/767—Hexagonal symmetry, e.g. beta-Si3N4, beta-Sialon, alpha-SiC or hexa-ferrites
-
- 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
- C04B2235/74—Physical characteristics
- C04B2235/76—Crystal structural characteristics, e.g. symmetry
- C04B2235/768—Perovskite structure ABO3
-
- 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
- C04B2235/74—Physical characteristics
- C04B2235/77—Density
-
- 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
- C04B2235/81—Materials characterised by the absence of phases other than the main phase, i.e. single phase materials
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Inorganic Insulating Materials (AREA)
- Ceramic Capacitors (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Description
J. Mater. Sci. Letters 20 (2001), 71−72 B. Jancar, D. Suvorov, M. Valent, "Microwave dielectric properties of CaTiO3−NdAlO3 ceramics" Mater. Res. Bull, 30 (6) 1995, pp653−658 H. Sreemoolanadhan,M.T. Sebastian, P. Mohanan Mater. Res. Bull, 31 (5) 1996, pp431−437 C. Veneis, P.K. Davies, T. Negas, S. Bell J. Appl. Phys. 89 (7) 2001, pp3900−3906 S. Kamba, J. Petzelt, E. Buixaderas, D. Haubrich, P. Vanek, P. Kuzel, I.N. Jawahar, M.T. Sebastian, P. Mohanan Russian J. Inorg. Chem. 34 (5) 1989, p758−759 V.A. Saltykova, O.V. Melnikova, N.F.Fedorov Meas. Sci. Technol. 9 (1998), 1751−1756 J. Krupka, K. derzakowsky, B. Riddle, J.B. Jarviz
カチオン欠損ヘキサゴナルペロヴスカイトCaLa4Ti4O15及びCa2La4Ti5O18を含むCaO‐La2O3‐TiO2系組成物は、高純度のCaCO3、La2O3及びTiO2の粉末をモル比1:2:4または2:2:5でセラミック固体反応法により反応させて製造する。これら粉末を化学量論に従って秤量し、プラスチック容器とジルコニアのボールを使用するボールミルにより蒸留水を介在させて24時間粉砕する。当該混合粉末を乾燥し、1200℃以上の温度で一回または異なる時間で繰り返し仮焼し、室温まで冷却する。マイクロ波誘電体特性を最大とするために、充分高い温度でより短い時間(通常、1350〜1500℃の範囲で2〜8時間)の仮焼を試行した。仮焼した混合物を良く粉砕し、バインダーとして3重量%のPVAを添加し,乾燥して再び粉砕する。得られた微粉末をマイクロ波計測に適する適切なサイズのペレット(高さ6〜8mm、直径14mm)にする。マイクロ波周波数における正確且つ適切な誘電体特性計測のためサンプルの寸法は前以て定めてある。最良のQ値のためにはアスペクト比(直径/長さ)は2〜2.3にすべきである。成形された円板状又は円筒パック形サンプルは1550〜1675℃の範囲で種々の時間で焼成した。焼成したサンプルは良く研磨して表面の不整を除去し、計測に使用される。
上記式において、Δf:室温(通常20℃)における共振周波数と測定周波数との差異
ΔT:室温と測定温度の差異
SrLa4Ti4O15セラミックスは高純度のSrCO3、La2O3とTiO2とをモル比1:2:4で反応させて製造する。製造及び計測は実施例1で記載した通りになされた。乾燥したこれら混合物を1200℃で4時間仮焼し、粉砕後再び1300〜1500℃の温度範囲で仮焼し、室温に冷却した。サンプルの焼成温度は1550℃と1650℃との間の温度で種々焼成することにより最適化した。単相の多結晶SrLa4Ti4O15セラミックスを得るためには、混合された酸化物粉末の最初の仮焼は充分に高い温度で充分な時間行わなければならない。1500℃で仮焼した場合を除き、焼成ペレットの濃度は>98%であった。1500℃で仮焼した場合の焼成後の濃度は〜93%に低下した。サンプルの処理法、整形法、測定技術は実施例1で説明した通りである。種々の仮焼温度におけるこのセラミックスのマイクロ波誘電体特性を表2に示す。
単相多結晶CaLa4Ti5O17及びCaLa8 Ti 9 O31を含むCa‐La2O3‐TiO2セラミックスは高純度のCaCO3、La2O3、TiO2をモル比1:2:5または1:4:9でセラミック固体反応法により反応させて製造する。製造方法及び計測方法は実施例1に説明したステップに従った。最初1200℃で4時間仮焼し、よく粉砕し、再び1350〜1450℃で種々の時間で仮焼した。焼成の最適化は1600℃と1675℃との間の範囲で2〜8時間において行った。高濃度単相セラミックス(理論濃度>93%)をマイクロ波特性の計測に使用した。
フィルタなどの実際の作動環境における誘電共振器の性能を実験するために、CaLa4Ti4O15の誘電体共振器のサンプルを、銅キャビティ内のPTFE基板上に設置した。共振周波数における帯域消去フィルタとしての作動を検討した。インピーダンス50Ω、幅3mmのストリップ線路を介してマイクロ波エネルギーをキャビティに接続した。PTFE基板上で、誘電体共振器をマイクロストリップ線路近傍に配置すると共振器と線路間に電磁結合を生じた。キャビティはサイズ50mm×50mm、深さ30mmの直方形である。金属円板を上下に移動して周波数を調整する。PTFE基板は2.2の誘電率を有し、基板の厚さは1.8456mmである。使用したサンプルのスペックは、誘電率が41、直径が11.42mm、厚さ4.63mm、D/L比は2.466であった。
Claims (15)
- 式xMO−yLa2O3−zTiO2で表され、MはSr及びCaから選択され、x:y:z=1:2:5または1:4:9であるマイクロ波誘電体セラミックス組成物において、該組成物の焼成体が、40以上の誘電率、+30と−30ppm/℃の間の共振周波数における温度係数及び4〜5GHzにおいて6800以上の品質係数を有することを特徴とするマイクロ波誘電体セラミックス組成物。
- 前記式において、MがCaでありx:y:z=1:2:5または1:4:9であることを特徴とする請求項1記載のマイクロ波誘電体セラミックス組成物。
- 前記組成物は単相多結晶構造であり、分子式CaLa4Ti5O17であることを特徴とする請求項1または請求項2記載のマイクロ波誘電体セラミックス組成物。
- 前記組成物は単相多結晶構造であり、分子式CaLa8Ti9O31であることを特徴とする請求項1または請求項2記載のマイクロ波誘電体セラミックス組成物。
- 前記組成物は単相多結晶構造であり、40と57との間の誘電率と、−25ppm/℃と10ppm/℃との間の共振周波数における温度係数とを有することを特徴とする請求項1乃至請求項4のいずれか1項記載のマイクロ波誘電体セラミックス組成物。
- 請求項1乃至請求項5のいずれか1項に記載の組成物に、TiO2、ZrO2、SiO2から選択された添加物と、層構造のカチオン欠損ペロブスカイトとを含むことを特徴とするマイクロ波誘電体セラミックス組成物。
- マイクロ波通信システムに使用され、請求項1記載のマイクロ波誘電体セラミックス組成物を含むことを特徴とする誘電体共振器。
- 前記誘電体共振器は、前記組成物により製造された基板と、該基板の一または複数の面に形成された導電パターンからなる導電体とを備えていることを特徴とする請求項7記載の誘電体共振器。
- 前記誘電体共振器は、金属電極により被覆された前記誘電材料の成形体を備えていることを特徴とする請求項8記載の誘電体共振器。
- マイクロ波通信システムに使用され、請求項8に記載の複数の誘電体共振器を備えていることを特徴とする誘電体フィルタ。
- 請求項1に記載の誘電体セラミック組成物を備えていることを特徴とするマイクロ波に適用される基板。
- 請求項1に記載の誘電体セラミック組成物を備えていることを特徴とする誘電体共振器アンテナ。
- 請求項1に記載の誘電体セラミック組成物を備えていることを特徴とする無線周波数用デバイス。
- 式xMO−yLa2O3−zTiO2(MはSr及びCa、x:y:z=1:2:5または1:4:9)である誘電体組成物の製造方法であって、CaCO3又はSrCO3と、TiO2及びLa2O3との粉末を混合し、仮焼し、成形して誘電体物質の成形体とし、該成形体を1200℃以上の温度で充分な時間焼成した後、室温又はそれ以上の温度に冷却することにより前記物質が25℃でマイクロ波周波数における40以上の誘電率と、−25ppm/℃と+20ppm/℃との間の温度係数とを有するようにすることを特徴とする誘電体組成物の製造方法。
- 前記成形体の焼成は1550〜1675℃の範囲の温度で行われることを特徴とする請求項14記載の誘電体組成物の製造方法。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IN2002/000051 WO2003080535A1 (en) | 2002-03-21 | 2002-03-21 | Microwave dielectric ceramic composition, method of manufacture thereof and devices comprising the same |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2005520773A JP2005520773A (ja) | 2005-07-14 |
JP2005520773A5 JP2005520773A5 (ja) | 2009-06-04 |
JP4326346B2 true JP4326346B2 (ja) | 2009-09-02 |
Family
ID=28053413
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2003578297A Expired - Fee Related JP4326346B2 (ja) | 2002-03-21 | 2002-03-21 | マイクロ波誘電体セラミック組成物、その製造方法及び当該組成物からなるデバイス |
Country Status (4)
Country | Link |
---|---|
JP (1) | JP4326346B2 (ja) |
AU (1) | AU2002242938A1 (ja) |
GB (1) | GB2402937B (ja) |
WO (1) | WO2003080535A1 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101673857B1 (ko) * | 2009-07-03 | 2016-11-08 | 유니버시티 푸트라 말레이지아 | 에너지 저장 세라믹 유전체 컴포넌트 및 그 방법 |
CN112266232A (zh) * | 2020-08-03 | 2021-01-26 | 杭州电子科技大学 | 一种适用于5g毫米波通讯应用的低介微波介质陶瓷材料及其制备方法 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0687367B2 (ja) * | 1984-11-27 | 1994-11-02 | 京セラ株式会社 | 誘電体磁器組成物 |
JPH107457A (ja) * | 1996-06-19 | 1998-01-13 | Tokin Corp | 誘電体磁器組成物 |
JP2003055039A (ja) * | 2001-08-09 | 2003-02-26 | Hitoshi Osato | マイクロ波誘電体組成物及びその製造方法 |
-
2002
- 2002-03-21 GB GB0423302A patent/GB2402937B/en not_active Expired - Fee Related
- 2002-03-21 JP JP2003578297A patent/JP4326346B2/ja not_active Expired - Fee Related
- 2002-03-21 AU AU2002242938A patent/AU2002242938A1/en not_active Abandoned
- 2002-03-21 WO PCT/IN2002/000051 patent/WO2003080535A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
WO2003080535A1 (en) | 2003-10-02 |
GB2402937B (en) | 2006-06-28 |
AU2002242938A1 (en) | 2003-10-08 |
JP2005520773A (ja) | 2005-07-14 |
GB2402937A (en) | 2004-12-22 |
GB0423302D0 (en) | 2004-11-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6800577B2 (en) | Microwave dielectric ceramic composition of the formula xmo-yla2o3-ztio2 (m=sr, ca; x:y:z=1:2:4, 2:2:5, 1:2:5 or 1:4:9), method of manufacture thereof and devices comprising the same | |
Kang et al. | Effect of Li2O–V2O5 on the low temperature sintering and microwave dielectric properties of Li1. 0Nb0. 6Ti0. 5O3 ceramics | |
WO2001083395A1 (en) | Low temperature sinterable and low loss dielectric ceramic compositions and method thereof | |
Huang et al. | Effect of B2O3 additives on sintering and microwave dielectric behaviors of CuO-doped ZnNb2O6 ceramics | |
Youn et al. | Dielectric relaxation and microwave dielectric properties of Bi2O3–ZnO–Ta2O5 ceramics | |
KR20020097240A (ko) | CaCu3Ti4O12를 혼입한 동조식 소자 | |
US5256639A (en) | Dielectric ceramic composition | |
KR20010109472A (ko) | 유전체 자기, 유전체 자기조성물 및 제조방법과, 이것을사용한 유전체 공진기 | |
JP4326346B2 (ja) | マイクロ波誘電体セラミック組成物、その製造方法及び当該組成物からなるデバイス | |
CA2010558C (en) | Dielectric ceramic material and method of producing same | |
Wang et al. | Microwave dielectric properties of multi-ions Ba (Zn, Ta) O3-based perovskite ceramics | |
JP2002121066A (ja) | アルミナ質焼結体及びその製造方法 | |
KR0173185B1 (ko) | 고주파용 유전체 자기 조성물 | |
Wei et al. | Influences of B2O3/CuO additions on the sintering behavior, microstructure and microwave dielectric properties of 6Nd [(Zn0. 7Co0. 3) 0.5 Ti0. 5] O3–4 (Na0. 5Nd0. 5) TiO3 ceramics | |
JP4535589B2 (ja) | 誘電体磁器及びこれを用いた誘電体共振器 | |
US9481606B2 (en) | Dielectric composition, dielectric film, and electronic component | |
KR100234017B1 (ko) | (1-x){(1-y)catio₃+ycazro₃}+xca(mg⅓nb⅔)o₃계 고주파용 유전체 세라믹 조성물 | |
JPH0840769A (ja) | 高周波用誘電体材料 | |
JP4959043B2 (ja) | 誘電体磁器組成物及びその製造方法並びに誘電体共振器 | |
KR100823217B1 (ko) | 유전체 자기 조성물 및 그 제조 방법 | |
JP4830286B2 (ja) | 高周波用誘電体磁器組成物、誘電体共振器、誘電体フィルタ、誘電体デュプレクサ、および通信機装置 | |
Li et al. | Microwave dielectric materials based on the MgO–SiO2–TiO2 system | |
JP2725372B2 (ja) | 誘電体磁器組成物 | |
JP3905993B2 (ja) | 高周波用誘電体磁器組成物及びそれを用いた積層部品 | |
JP4753463B2 (ja) | 誘電体磁器およびこれを用いた誘電体共振器 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20080325 |
|
A601 | Written request for extension of time |
Free format text: JAPANESE INTERMEDIATE CODE: A601 Effective date: 20080610 |
|
A602 | Written permission of extension of time |
Free format text: JAPANESE INTERMEDIATE CODE: A602 Effective date: 20080617 |
|
A601 | Written request for extension of time |
Free format text: JAPANESE INTERMEDIATE CODE: A601 Effective date: 20080701 |
|
A602 | Written permission of extension of time |
Free format text: JAPANESE INTERMEDIATE CODE: A602 Effective date: 20080708 |
|
A601 | Written request for extension of time |
Free format text: JAPANESE INTERMEDIATE CODE: A601 Effective date: 20080814 |
|
A602 | Written permission of extension of time |
Free format text: JAPANESE INTERMEDIATE CODE: A602 Effective date: 20080821 |
|
A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20080924 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20081209 |
|
A524 | Written submission of copy of amendment under section 19 (pct) |
Free format text: JAPANESE INTERMEDIATE CODE: A524 Effective date: 20090224 |
|
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: 20090602 |
|
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20090609 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120619 Year of fee payment: 3 |
|
R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130619 Year of fee payment: 4 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
LAPS | Cancellation because of no payment of annual fees |