JP2015516362A - 平板状セラミックの焼結方法および装置 - Google Patents
平板状セラミックの焼結方法および装置 Download PDFInfo
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- JP2015516362A JP2015516362A JP2015507196A JP2015507196A JP2015516362A JP 2015516362 A JP2015516362 A JP 2015516362A JP 2015507196 A JP2015507196 A JP 2015507196A JP 2015507196 A JP2015507196 A JP 2015507196A JP 2015516362 A JP2015516362 A JP 2015516362A
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
- B28B23/028—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members for double - wall articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B18/00—Layered products essentially comprising ceramics, e.g. refractory products
-
- 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
- C04B35/44—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 aluminates
-
- 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
-
- 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
- C04B35/62625—Wet mixtures
- C04B35/6264—Mixing media, e.g. organic solvents
-
- 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
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Abstract
Description
焼結は、セラミック粉末が圧密されるので、セラミック材料の大きな収縮を伴うことは公知である。そしてまた収縮は、セラミック材料の反り、またはたわみおよび割れ、ならびに表面損傷を生じさせる。
本開示は、セラミック材料の焼結に付随する、かかる困難を減少させるまたは無くすセラミック材料焼結方法に関する。
本実施例では、おおよそ4.5m2/gのブルナウアー・エメット・テラー(Brunauer−Emmett−Teller:BET)表面積を有する57.06gのY2O3粒子、および5.6m2/gのBET表面積を有する42.94gのAl2O3粒子を、250mL ZrO2ボール・ミル・ジャー(Torrey Hills Technologies,LLC、カリフォルニア州サンディエゴ)に添加した。YAGを形成するために、全粉末重量は、100.00gであり、Y2O3のAl2O3に対する混合比は、mol%で3:5の化学量論比であった。分散剤(2.00pph、2.00g)、および焼結助剤としてのオルトケイ酸テトラエチル(0.50pph、0.50g)もそのミルジャーに添加した。トルエン(33.33g)をミルジャーに添加し、その後、ミルジャーの内容物を、その混合物が液体のように見えるまで手で撹拌した。その後、3mm径の130gのZrO2粉砕媒体をそのミルジャーに添加し、ミルジャーの中の混合物を、第一混合段階として約24時間、ベンチトップ遊星ボールミル(MTI Corporation、カリフォルニア州リッチモンド)によって粉砕した。
(実施例3)
(実施例4)
(実施例5)
(実施例6)
(比較例2)
(比較例3)
(比較例4)
(比較例5)
(比較例6)
たわみおよび粗度測定
Claims (47)
- セラミックを焼結させて焼結セラミック板を製造する方法であって、
第一のメッシュと第二のメッシュの間でセラミック前駆体材料を加熱する段階
を含み、
加熱中に、前記セラミック前駆体材料の少なくとも第一の部分が前記第一のメッシュと接触し、および前記セラミック前駆体材料の少なくとも第二の部分が、前記第二のメッシュと接触し、
それによって焼結セラミック板を製造する方法。 - 前記セラミック前駆体材料が、セラミック粒子を含有する未焼結セラミック成形体の形態である、請求項1に記載の方法。
- 前記セラミック前駆体材料が、前記第一のメッシュおよび前記第二のメッシュと摺接する、請求項1または2に記載の方法。
- 前記第一のメッシュおよび前記第二のメッシュのいずれかまたは両方が、熱伝導性材料を含有する、前記請求項のいずれか一項に記載の方法。
- 前記熱伝導性材料が、未焼結セラミック成形体の焼結温度より高い減成温度を有する、請求項4に記載の方法。
- 前記減成温度が、前記焼結温度より少なくとも200℃高い、請求項5に記載の方法。
- 前記セラミック前駆体材料が、バインダーおよび溶剤の実質的にすべてを蒸発または燃焼させるために十分に高い温度で加熱された前記溶剤、バインダーおよびセラミック粒子のスラリーの生成物である、前記請求項のいずれか一項に記載の方法。
- 前記セラミック前駆体材料が、セラミック粒子を含有する未焼結グリーンシートの形態である、前記請求項のいずれか一項に記載の方法。
- 前記セラミック前駆体材料が、前記第一のメッシュおよび/または前記第二のメッシュと複数の実質的に周期的な分布接触点または線で摺接する、前記請求項のいずれか一項に記載の方法。
- 前記セラミック前駆体材料が、前記第一のメッシュおよび/または前記第二のメッシュと複数の実質的に均一に分布した接触点または線で摺接する、前記請求項のいずれか一項に記載の方法。
- 1平方インチあたりの接触点または線の数が、おおよそ500、1000、1500、2000、2500、3000、3500、4000、4500、5000、5500、6000、6500、7000、7500、8000、8500、9000、9500または10000である、前記請求項のいずれか一項に記載の方法。
- 前記前駆体材料に、前記焼結セラミック板の反りを減少させるが、前記セラミック前駆体材料と前記第一のメッシュおよび/または前記第二のメッシュの摺動係合を可能にするために十分な圧力を印加する段階をさらに含む、前記請求項のいずれか一項に記載の方法。
- 前記焼結セラミック板の反りが、50μm/mm2未満の垂直変位である、請求項12に記載の方法。
- 十分な圧力の前記印加が、前記第一のメッシュ上に約0.1gm/cm2から約20gm/cm2の金属板を置くことを含む、請求項12または13に記載の方法。
- 前記熱伝導性材料が、ステンレス鋼、鉄、鉄合金、銅、銅合金、ニオブ、ニオブ合金、モリブデン、モリブデン合金、ニッケル、ニッケル合金、白金、白金合金、タンタル、タンタル合金、チタン、チタン合金、タングステン、タングステン合金、レニウム、レニウム合金、またはこれらの任意の組み合わせを含有する、請求項4に記載の方法。
- 前記熱伝導性材料が、実質的にタングステンを含有する、請求項15に記載の方法。
- 前記熱伝導性材料が、タングステン:モリブデン合金を含有する、請求項15に記載の方法。
- 前記タングステン:モリブデン合金が、約50原子%モリブデンである、請求項17に記載の方法。
- 前記第一のメッシュおよび前記第二のメッシュのいずれかまたは両方が、複数の織り合わされたワイヤを含み、前記複数の織り合わされたワイヤが、平面上に複数の実質的に均一に分布した接触点または線を提供する、前記請求項のいずれか一項に記載の方法。
- 前記第一のメッシュおよび前記第二のメッシュのいずれかまたは両方が、平織物として構成される、前記請求項のいずれか一項に記載の方法。
- 前記第一のメッシュおよび前記第二のメッシュのいずれかまたは両方が、綾織物として構成される、請求項1〜19のいずれか一項に記載の方法。
- 前記セラミック前駆体材料が、酸化物材料を含有する未焼結セラミック成形体の形態である、前記請求項のいずれか一項に記載の方法。
- 前記酸化物材料が、金属元素を含有する、請求項22に記載の方法。
- 前記酸化物材料が、ケイ素を含有する、請求項22に記載の方法。
- 前記セラミック前駆体材料が、ガーネット材料を含有する未焼結セラミック成形体の形態である、前記請求項のいずれか一項に記載の方法。
- 前記ガーネット材料が、イットリウムを含有する、請求項25に記載の方法。
- 前記セラミック前駆体材料が、窒化物材料を含有する未焼結セラミック成形体の形態である、前記請求項のいずれか一項に記載の方法。
- 前記セラミック前駆体材料が、酸窒化物材料を含有する未焼結セラミック成形体の形態である、前記請求項のいずれか一項に記載の方法。
- 前記酸窒化物材料が、金属元素を含有する、請求項28に記載の方法。
- 前記酸窒化物材料が、ケイ素を含有する、請求項28に記載の方法。
- 前記第一のメッシュおよび前記第二のメッシュのいずれかまたは両方が、90°の角度で交差するワイヤを含む、前記請求項のいずれか一項に記載の方法。
- 前記第一のメッシュおよび前記第二のメッシュのいずれかまたは両方が、約10°、約15°、約30°、約45°、約60°または約80°の角度で交差するワイヤを含む、請求項1〜30のいずれか一項に記載の方法。
- 前記第一のメッシュおよび前記第二のメッシュのいずれかまたは両方が、約5ワイヤ毎インチから約500ワイヤ毎インチであるメッシュサイズを有する、前記請求項のいずれか一項に記載の方法。
- 前記メッシュサイズが、約10ワイヤ毎インチから約200ワイヤ毎インチである、請求項33に記載の方法。
- 前記メッシュサイズが、約30ワイヤ毎インチから約100ワイヤ毎インチである、請求項34に記載の方法。
- 前記メッシュサイズが、約40ワイヤ毎インチ、約50ワイヤ毎インチ、約60ワイヤ毎インチ、約70ワイヤ毎インチ、または約80ワイヤ毎インチである、請求項35に記載の方法。
- 前記第一のメッシュおよび前記第二のメッシュのいずれかまたは両方が、約30ワイヤ毎インチから約100ワイヤ毎インチのメッシュサイズ、および約400μm未満のワイヤ径を有する、前記請求項のいずれか一項に記載の方法。
- 前記第一のメッシュおよび前記第二のメッシュのいずれかまたは両方が、両方の寸法に関して同じであるメッシュサイズを有する、前記請求項のいずれか一項に記載の方法。
- 前記メッシュサイズが、約40×40ワイヤ毎インチ、約50×50ワイヤ毎インチ、約60×60ワイヤ毎インチ、約70×70ワイヤ毎インチ、または約80×80ワイヤ毎インチである、請求項38に記載の方法。
- 前記第一のメッシュおよび前記第二のメッシュのいずれかまたは両方が、両方の寸法に関して同じでないメッシュサイズを有する、請求項1〜37のいずれか一項に記載の方法。
- 前記焼結セラミック板が、場合によりドープされているイットリウム・アルミニウム・ガーネットを含有する、請求項1〜21および31〜39のいずれか一項に記載の方法。
- 前記焼結セラミック板が、ガドリニウムがドープされているイットリウム・アルミニウム・ガーネットを含有する、請求項41に記載の方法。
- 前記イットリウム・アルミニウム・ガーネットがアンドープである、請求項41に記載の方法。
- 前記焼結セラミック板が、場合によりドープされているルテチウム・アルミニウム・ガーネットを含有する、請求項1〜21および31〜39のいずれか一項に記載の方法。
- 前記ルテチウム・アルミニウム・ガーネットがアンドープである、請求項44に記載の方法。
- 請求項1〜45のいずれか一項に記載の方法に従って製造される焼結セラミック板。
- 請求項46に記載の焼結セラミック板を含む照明デバイス。
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US13/842,878 US9205571B2 (en) | 2012-04-18 | 2013-03-15 | Method and apparatus for sintering flat ceramics |
PCT/US2013/037251 WO2013158932A1 (en) | 2012-04-18 | 2013-04-18 | Method and apparatus for sintering flat ceramics |
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