JP2011526573A - チタン酸アルミニウム型の多孔質構造体を製造するための粒子混合物 - Google Patents
チタン酸アルミニウム型の多孔質構造体を製造するための粒子混合物 Download PDFInfo
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Abstract
【選択図】なし
Description
−メジアン径d50が12μm超である、粗大粒径部分;及び
−メジアン径d50が0.5〜3μmである、微細粒径部分。
ここで粗大部分の、微細部分に対する質量比は、1.5以上20以下であり、粗大部分のメジアン径の、微細部分のメジアン径に対する比は、12超である。
(Al2TiO5)x(MgTi2O5)y(MgTiZrO5)z
(ここで、0.1≦x<1;0<y≦0.9;及びz=1−x−yである)。
a)粗大部分及び微細部分を、共に混合するステップ;
b)その粒子混合物を、メチルセルロース型の有機バインダー及び任意的に気孔形成剤、並びにステップc)を実行するための可塑性を得るのに十分な量の水の存在下で、混合するステップ
c)ダイを通じて未焼成ハニカム構造体を押し出すステップ;及び
d)1300℃〜1800℃の温度で上記構造体を焼成するステップ。
a)開始分量を形成するために原料を混合するステップ;
b)溶融液を得るために開始分量を溶融するステップ;
c)溶融液を冷却して、それにより溶融液を完全に固化するステップ(この冷却は、例えば三分未満で素早く行うことができる);及び
d)任意的に、その固形体を、粒子混合物を得るために粉砕するステップ。
第一に、上述したような焼結又は溶融キャストにより得られる粒子を混合する。本発明では、溶融キャスト粒子を、本発明の意味内において適切な粒径を有するように粉砕していた。本分野で周知の方法で、この製造方法は、典型的には、初期粒子混合物と、メチルセルロース型の有機バインダー、及び気孔形成剤(例えば、でんぷん、グラファイト、ポリエチレン、PMMA等)とを混合するステップ、並びにハニカム構造体を押し出すステップを可能とするのに必要な可塑性が得られるまで、水を段階的に添加するステップを含む。
−99.5%超の純度、及び90μmのメジアン径d50を有する約40wt%のアルミナ(AR75(商標)、Pechiney社により販売されている);
−95wt%超のTiO2及び約1%のジルコニアを含有し、且つ約120μmのメジアン径d50を有する、約50wt%のルチル形のTiO2(Europe Minerals社により販売されている);
−99.5%超の純度、及び208μmのメジアン径d50を有する約5wt%のSiO2(SIFRACO社により販売されている);及び
−98%超の純度を有し、且つ80%超の粒子が0.25〜1mmの直径を有する約4wt%のMgO(Nedmag社により販売されている)。
−本発明において用語「粗大部分」で示される、約30μmのメジアン径d50によって特徴付けられる粒径部分;
−本発明において用語「粗大部分」で示される、約16μmのメジアン径d50によって特徴付けられる粒径部分;
−本発明において用語「微細部分」で示される、約1.5μmのメジアン径d50によって特徴付けられる粒径部分;及び
−本発明において用語「微細部分」で示される、約0.7μmのメジアン径d50によって特徴付けられる粒径部分。
1)耐火性生成物中に存在する結晶相を、X線回折によって特徴付けた。表2において、AMTZは、(Al2TiO5)x(MgTi2O5)y(MgTiZrO5)z型の固溶体を示し(ここで、Z=1−x−y)、P2は、二番目の副相に相当し、Psは、追加のケイ酸塩相の存在を示す。
2)酸化物に基づく重量%で示した、様々な相の化学的組成を、蛍光X線によって測定した。
1)上記用途向けに簡単に形成することができる材料、すなわちハニカム構造に簡単に押し出すことができる材料;及び
2)機械的強度、気孔率、及び上記用途に適合する安定性(収縮)特性を兼ね備えた材料。
Claims (10)
- 少なくともチタン及びアルミニウムを含有する擬板チタン石型の酸化物相を主に含む又は前記酸化物相からなる粒子混合物であって、次の少なくとも二つの粒径部分から得られる、粒子混合物:
−メジアン径d50が12μm超である、粗大粒径部分;及び
−メジアン径d50が0.5〜3μmである、微細粒径部分;
(ここで、前記粗大部分の、前記微細部分に対する質量比は、1.5以上20以下であり、且つ前記粗大部分のメジアン径の、前記微細部分のメジアン径に対する比は、12超である)。 - 少なくともいくつかの前記粒子が、少なくともチタン及びアルミニウムを含有する前記擬板チタン石型の酸化物相からなる主相、並びに少なくとも一つの第二相を有し、前記第二相が、ガラス状相及び/又は酸化チタンTiO2から本質的になる相である、請求項1に記載の粒子混合物。
- 前記擬板チタン石型の酸化物相が、前記チタン酸アルミニウム型の相が次の式をおおよそ満たすような割合で、チタン、アルミニウム、並びに任意的にマグネシウム及び/又はジルコニウムを含有する、請求項1又は2に記載の粒子混合物:
(Al2TiO5)x(MgTi2O5)y(MgTiZrO5)1−x−y
(ここで、0.1≦x<1;0<y≦0.9;及びz=1−x−yである)。 - 前記粗大粒径部分が、15μm超のメジアン径d50を有する、請求項1〜3のいずれか一項に記載の粒子混合物。
- 前記粗大粒径部分が、100μm未満、好ましくは80μm未満、さらに好ましくは50μm未満のメジアン径d50を有する、請求項1〜4のいずれか一項に記載の粒子混合物。
- 前記粗大部分の、前記微細部分に対する質量比が、1.5〜5である、請求項1〜5のいずれか一項に記載の粒子混合物。
- 前記粗大部分のメジアン径の、微細部分のメジアン径に対する比が、15超、好ましくは20以上25以下である、請求項1〜6のいずれか一項に記載の粒子混合物。
- 触媒担体又はハニカム粒子フィルターを、請求項1〜7のいずれか一項に記載の粒子混合物から製造する方法であって、次の主なステップを含む方法:
a)前記粗大部分及び前記微細部分を、共に混合するステップ;
b)前記粒子混合物を、メチルセルロース型の有機バインダー及び任意的に気孔形成剤、並びにステップc)を実行するための可塑性を得るのに十分な量の水の存在下で混合するステップ
c)ダイを通じて未焼成ハニカム構造体を押し出すステップ;及び
d)1300℃〜1800℃の温度で前記構造体を焼成するステップ。 - 少なくともチタン及びアルミニウムを含有する擬板チタン石型の酸化物相を主に含む又は前記酸化物相からなる、請求項8に記載の方法によって得ることができる触媒担体。
- フィルター部が、少なくともチタン及びアルミニウムを含有する擬板チタン石型の酸化物相を主に含む又は前記酸化物相からなる、請求項8に記載の方法によって得ることができる粒子フィルター、場合によっては触媒性粒子フィルター。
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JP2011526576A (ja) * | 2008-07-04 | 2011-10-13 | サン−ゴバン サントル ドゥ ルシェルシェ エ デトゥードゥ ユーロペン | チタン酸アルミニウム型の多孔質構造体 |
WO2019163533A1 (ja) * | 2018-02-26 | 2019-08-29 | イビデン株式会社 | ハニカム構造体の製造方法 |
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US9464004B2 (en) * | 2011-02-28 | 2016-10-11 | Corning Incorporated | Method for manufacturing ceramic honeycombs with reduced shrinkage |
CN105793215A (zh) * | 2013-11-20 | 2016-07-20 | 鲁姆斯科技公司 | 具有高耐毒性的烯烃双键异构化催化剂 |
JP6502495B2 (ja) | 2014-11-19 | 2019-04-17 | コーニング インコーポレイテッド | 制御されたサイズ分布を有するセラミック粉末 |
CN107794393B (zh) * | 2016-09-05 | 2019-08-27 | 中南大学 | 一种微米级的低孔隙率多孔铝合金的制备方法 |
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US20110190120A1 (en) | 2011-08-04 |
FR2933399A1 (fr) | 2010-01-08 |
KR20110028332A (ko) | 2011-03-17 |
WO2010001062A3 (fr) | 2010-03-18 |
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