JP6454265B2 - 多孔質焼結体及び多孔質焼結体の製造方法 - Google Patents
多孔質焼結体及び多孔質焼結体の製造方法 Download PDFInfo
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Description
隣接する粒子をネッキング焼結することができる。ネッキング焼結することにより、粒子形態の少なくとも一部を残した状態で焼結して形成することができる。また、上記微粒子焼結層を構成する上記第2の焼結粉体の少なくとも一部が、粒子形態を残すことなく完全に溶融させられて一体化されるように形成することもできる。
124 第2の焼結粉体
131 空孔
132 微粒子焼結層
151 多孔質焼結体
Claims (20)
- 交絡又は編成された繊維状消失材を消失させた形態を有する中空状の芯部と、
上記芯部の周りに保持された第1の焼結粉体を焼結して形成されるとともに上記芯部の長手方向に連なる焼結壁部と、
上記焼結壁部間に形成された空隙部とを備え、
上記芯部と上記空隙部とが、上記焼結壁部に形成された欠損部を介して連通させられている多孔質焼結体であって、
上記焼結壁部の表面に、上記第1の焼結粉体より径の小さい第2の焼結粉体を含んで構成されるとともに、亀裂状又は皺状の形態を有する所定の空孔が形成された微粒子焼結層が設けられており、
上記第1の焼結粉体は、上記繊維状消失材の直径の1/5〜1/50の粒径を有するとともに、
上記第2の焼結粉体は、20nm〜1000nmの粒径を有する、多孔質焼結体。 - 上記空孔は、上記微粒子焼結層の外面における幅方向最大孔径が、上記第2の焼結粉体の平均粒径より大きな平均孔径を有する、請求項1に記載の多孔質焼結体。
- 上記空孔は、上記微粒子焼結層の少なくとも表面側に形成されている、請求項1又は請求項2のいずれか1項に記載の多孔質焼結体。
- 上記微粒子焼結層は、少なくとも2種類以上の異なる微粒子粉体を含んで構成されている、請求項1から請求項3のいずれか1項に記載の多孔質焼結体。
- 上記微粒子焼結層は、少なくとも同一微粒子間では固相焼結しない非焼結微粒子粉体を含んで構成されている、請求項1から請求項4のいずれか1項に記載の多孔質焼結体。
- 上記微粒子焼結層は、組成の異なる複数の層を備えて構成されている、請求項1から請求項5のいずれか1項に記載の多孔質焼結体。
- 上記微粒子焼結層を構成する上記第2の焼結粉体の一部又は全部について、隣接する粒子がネッキング焼結されている、請求項1から請求項6のいずれか1項に記載の多孔質焼結体。
- 上記微粒子焼結層を構成する上記第2の焼結粉体の少なくとも一部の粉体が、完全に溶融されて一体化されている、請求項1から請求項7のいずれか1項に記載の多孔質焼結体。
- 上記微粒子焼結層は、上記微粒子焼結層の外面における幅方向最大孔径が、5nm〜1μmの空孔を備える、請求項1から請求項8のいずれか1項に記載の多孔質焼結体。
- 上記芯部の直径が5μm〜100μmであり、
上記焼結壁部は、平均粒径が0.5μm〜30μmである第1の焼結粉体を焼結して形成されるとともに、0.5μm〜50μmの平均厚みを備える一方、
上記微粒子焼結層は、平均粒径が20nm〜1000nmである第2の焼結粉体を焼結して形成されるとともに20nm〜1000nmの厚みを備えている、請求項1から請求項9に記載のいずれか1項に多孔質焼結体。 - 上記多孔質焼結体は、厚み30μm〜1000μmのシート状に形成されている、請求項1から請求項10のいずれか1項に記載の多孔質焼結体。
- 多孔質焼結体の製造方法であって、
繊維状消失材を交絡させあるいは編成して所要の形態の多孔質体を形成する繊維状消失材成形工程と、
上記繊維状消失材の外周表面に第1の焼結粉体を付着させる第1の焼結粉体付着工程と、
上記繊維状消失材を消失させる消失材消失工程と、
上記多孔質体を焼結することにより、上記繊維状消失材が消失して形成される中空芯部と、上記芯部と上記空隙部とが欠損部を介して連通させられた焼結壁部と、上記焼結壁部間に形成された空隙部とを備える多孔質焼結基材を形成する第1の焼結工程と、
上記焼結壁部の表面に、上記第1の焼結粉体より径の小さい第2の焼結粉体を含む粉体を付着させる第2の焼結粉体付着工程と、
上記第2の焼結粉体を焼結することにより、上記焼結壁部の外周に、亀裂状又は皺状の形態を有する所定の空孔が形成された微粒子焼結層を形成する第2の焼結工程とを含む、多孔質焼結体の製造方法。 - 上記繊維状消失材成形工程は、
繊維状消失材と、上記第1の焼結粉体と、これら成分を分散して混入できる分散液とを混合してスラリー調整するスラリー調整工程と、
上記スラリーから湿式抄紙法によってシート状形成体を成形する抄紙工程とを含むとともに、
上記第1の焼結粉体付着工程は、
上記スラリーを含む上記シート状成形体を脱水及び/又は乾燥することにより、交絡する上記繊維状消失材の外周表面に上記第1の焼結粉体を保持させる脱水乾燥工程を含む、請求項12に記載の多孔質焼結体の製造方法。 - 上記第1の焼結粉体付着工程は、
上記繊維状消失材成形工程において所要の形態に成形された多孔質体に、第1の焼結粉体を分散させたスラリーを含浸させる含浸工程と、
上記スラリーを含む上記成形体を脱水及び/又は乾燥することにより、交絡する上記繊維状消失材の外周表面に上記第1の焼結粉体を保持させる脱水乾燥工程とを含む、請求項12に記載の多孔質焼結体の製造方法。 - 上記第2の焼結粉体付着工程は、
第1の焼結工程を終えた上記多孔質焼結基材に、第2の焼結粉体を分散させた第2のスラリーを含浸させる第2の含浸工程と、
上記第2のスラリーを含む上記多孔質焼結基材を脱水及び/又は乾燥することにより、上記多孔質焼結基材の焼結壁部の表面に上記第2の焼結粉体を保持させる第2の脱水乾燥工程とを含む、請求項12から請求項14のいずれか1項に記載の多孔質焼結体の製造方法。 - 上記第2の焼結粉体付着工程において、上記多孔質焼結基材の焼結壁部の表面に、所定の径を有する微粒子状の空孔形成材を上記第2の焼結粉体とともに保持させ、
上記第2の焼結工程において、あるいは第2の焼結工程を行う前に行われる空孔形成材消失工程において、上記空孔形成材を消失させる、請求項12から請求項15のいずれか1項に記載の多孔質焼結体の製造方法。 - 上記第2の焼結粉体付着工程は、上記第2の焼結粉体を含む少なくとも2種類以上の異なる微粒子粉体を上記焼結壁部の表面に保持させる1又は2以上の粉体付着工程を含む、請求項12から請求項16のいずれか1項に記載の多孔質焼結体の製造方法。
- 上記第1の焼結粉体付着工程及び/又は上記第2の焼結粉体付着工程は、真空環境下で焼結粉体を含むスラリーを含浸させて行われる、請求項12から請求項17のいずれか1項に記載の多孔質焼結体の製造方法。
- 上記第2の焼結工程において、上記微粒子焼結層を構成する上記第2の焼結粉体の一部又は全部において、隣接する粒子をネッキング焼結させる、請求項12から請求項18のいずれか1項に記載の多孔質焼結体の製造方法。
- 上記第2の焼結工程において、上記微粒子焼結層を構成する上記第2の焼結粉体の少なくとも一部の粉体が、完全に溶融させて一体化させる、請求項12から請求項19のいずれか1項に記載の多孔質焼結体の製造方法。
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JP2013042838 | 2013-03-05 | ||
JP2013042838 | 2013-03-05 | ||
PCT/JP2014/055676 WO2014136849A1 (ja) | 2013-03-05 | 2014-03-05 | 多孔質焼結体及び多孔質焼結体の製造方法 |
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JPWO2014136849A1 JPWO2014136849A1 (ja) | 2017-02-16 |
JP6454265B2 true JP6454265B2 (ja) | 2019-01-16 |
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US11612837B2 (en) | 2020-09-18 | 2023-03-28 | Pall Corporation | Filter with interconnected hollow elements and method of use |
RU2765971C1 (ru) * | 2021-03-16 | 2022-02-07 | Федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский технологический университет "МИСиС" | Способ получения материала с разноуровневой пористостью на основе порошков гематита |
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JPS63255304A (ja) | 1987-04-10 | 1988-10-21 | Kobe Steel Ltd | 多孔質金属焼結体の製造方法 |
JPH06299273A (ja) | 1993-04-09 | 1994-10-25 | Koizumi Seisakusho:Kk | 金属多孔体の製造方法と金属多重多孔体 |
JPH06306672A (ja) * | 1993-04-26 | 1994-11-01 | Denki Kagaku Kogyo Kk | 複合材料強化材、その製造方法及び複合材料 |
CA2131872A1 (en) | 1993-09-14 | 1995-03-15 | Hirofumi Sugikawa | Metallic porous sheet and method for manufacturing same |
JP3483600B2 (ja) | 1993-10-26 | 2004-01-06 | 片山特殊工業株式会社 | 金属多孔体および該金属多孔体の製造方法 |
AU2190197A (en) * | 1996-02-27 | 1997-09-16 | Astro Met, Inc. | Porous materials and method for producing |
DE19753249B4 (de) * | 1997-12-01 | 2005-02-24 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Keramiknetzwerk, Verfahren zu dessen Herstellung und Verwendung |
DE10150948C1 (de) * | 2001-10-11 | 2003-05-28 | Fraunhofer Ges Forschung | Verfahren zur Herstellung gesinterter poröser Körper |
JP5129926B2 (ja) * | 2002-12-12 | 2013-01-30 | インテグリス・インコーポレーテッド | 多孔質焼結コンポジット材料 |
WO2006041118A1 (ja) * | 2004-10-15 | 2006-04-20 | Taisei Kogyo Co., Ltd. | 多孔質焼結体の製造方法、多孔質焼結成形材料及び多孔質焼結体 |
JP4859689B2 (ja) | 2006-03-01 | 2012-01-25 | 東邦チタニウム株式会社 | シート状多孔質体の製造方法 |
JP4291348B2 (ja) * | 2006-09-25 | 2009-07-08 | 株式会社長峰製作所 | 多孔質構造体の製造方法 |
WO2011028549A2 (en) * | 2009-08-24 | 2011-03-10 | Porvair Plc | Corrosion resistant glass coating applied to ceramic foam used to filter molten metal |
US20150017464A1 (en) * | 2011-12-28 | 2015-01-15 | Taisei Kogyo Co., Ltd. | Porous sintered body and process for producing porous sintered body |
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US11247266B2 (en) | 2022-02-15 |
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