JP2015502905A - 多孔質ムライト含有複合物を作製するための方法 - Google Patents
多孔質ムライト含有複合物を作製するための方法 Download PDFInfo
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Abstract
Description
(a)気体フッ素含有化合物、または、出発の多孔性アルミン酸塩含有セラミック体がシリコンを含有しないならば、シリコン原子およびフッ素原子の気体ソースと、出発の多孔性アルミン酸塩含有セラミック体の孔を700〜1200℃の温度で接触させて、多孔性アルミン酸塩含有セラミック体の孔の表面の少なくとも一部上でフルオロトパーズを形成する工程と、次いで
(b)1000〜1500℃の温度までセラミック体を加熱して、フルオロトパーズをセラミック体の孔の表面へ付加された針状ムライトウィスカーへ転換する工程と
を含むプロセスである。
滑らかな高密度壁および約90体積%の多孔率を有する商業的に入手可能なα−アルミナフォームは、SiF4雰囲気(SiF4分圧400torr)下で約800℃の温度まで8時間加熱される。次いで温度を1150℃まで2時間増加させて、フォームの外部および内部の孔表面上に針状ムライト結晶を形成させる。出発のフォームの表面積は0.06m2/gである。記載された処理後に、フォームの表面積は0.2m2/gまたは初期値の約350%に増加する。
アルカリアルミノケイ酸塩フォームは、SiO2、Al2O3およびNa2Oの混合物を1100℃でか焼することによって作製される。このフォームは図2A中で示されるように滑らかな高密度壁を有する。このフォームを実施例1中で記載される一般的様式で処理して、孔表面上に針状ムライト結晶を生産する。図2Bは処理されたフォームの顕微鏡写真図である。図2B中で理解することができるように、孔表面は非常に粗くなり、それらの表面積は有意に増加される。
ウレタンフォームを前駆体スラリー中で浸漬し、乾燥し、1000℃でか焼して、アルミナフォームを形成する。ウレタンフォームは、か焼工程の間に燃焼される。アルミナフォームを実施例1中で記載されるものと同じ一般的様式で処理する。内部孔表面は長さおよそ50ミクロンの針状ムライト結晶によりカバーされるようになる。
多孔性セル壁を有するチタン酸アルミニウムハニカムを実施例1中で記載されるものと同じ一般的様式で処理する。針状ムライト結晶はセル壁の表面上に形成される。SiF4へのより長期の露光に際して、針状ムライト結晶は壁中で孔内でも形成される。図3は処理されたチタン酸時間アルミニウムハニカムの顕微鏡写真図であり、壁表面上の針状ムライト結晶の存在を示す。
多孔性セル壁を有するコーディエライトハニカムを1,1,1,2−テトラフルオロエタン気体と1000℃で5時間、および次いで1100℃で2時間反応させて、針状ムライト結晶を生産する。この処理の結果として、コーディエライトのおよそ10%は針状ムライトに転換され、それはセル壁上およびセル壁の孔中に結晶を形成する。針状ムライト結晶は長さ20〜30ミクロンである。図4は、処理されたハニカムの表面の一部の顕微鏡写真図で、針状ムライト結晶の存在を示す。
Claims (15)
- 出発の多孔性アルミニウム含有セラミック体の表面積を増加させるプロセスであって、
(a)気体フッ素含有化合物、または、出発の多孔性アルミン酸塩含有セラミック体がシリコンを含有しないならば、シリコン原子およびフッ素原子の気体ソースと、出発の多孔性アルミン酸塩含有セラミック体の孔を700〜1200℃の温度で接触させて、多孔性アルミン酸塩含有セラミック体の孔の表面の少なくとも一部上でフルオロトパーズを形成する工程と、次いで
(b)1000〜1500℃の温度までセラミック体を加熱して、フルオロトパーズをセラミック体の孔の表面へ付加された針状ムライトウィスカーへ転換する工程と
を含むプロセス。 - 前記アルミン酸塩が、アルミナ、チタン酸アルミニウム、非針状ムライト、コーディエライトおよびアルカリアルミノケイ酸塩から選択される、請求項1に記載のプロセス。
- 前記出発のセラミック体が、孔の存在以外は、理論密度の少なくとも90%まで好ましくは緻密化される、請求項1または2のいずれか一項に記載のプロセス。
- 前記出発のセラミック体が約30%〜85%の多孔率を有する、請求項1〜3のいずれか一項に記載のプロセス。
- 前記孔のサイズが、水銀ポロシメータによって測定されたとき、5〜50ミクロンである、請求項1〜4のいずれか一項に記載のプロセス。
- 前記フッ素含有化合物が、1つまたは複数のSiF4、AlF3、HF、Na2SiF6、NaF、NH4F、メチレンジフルオリド、トリフルオロメタン、テトラフルオロメタン、1,1,1,2,2−ペンタフルオロエタン、1,1,1,2−テトラフルオロエタン、1,1,2−トリフルオロエタン、1,1,1−トリフルオロエタン、1,1−ジフルオロエタン、1,1,1,2,3,3,3−ヘプタフルオロプロパン、1,1,2,2,3,3−ヘキサフルオロプロパン、1,1,1,3,3,3−ヘキサフルオロエタン、1,1,2,2,3−ペンタフルオロペンタン、1,1,1,4,4,4−ヘキサフルオロブタンおよび1,1,1,3,3−ペンタフルオロブタンである、請求項1〜5のいずれか一項に記載のプロセス。
- 前記出発のセラミック体が、軸方向に延長する多孔性壁との交差によって画成される1つまたは複数の軸方向に延長するセルを有するハニカムである、請求項1〜6のいずれか一項に記載のプロセス。
- 前記セラミック体の製品の表面積が出発のセラミック体のものの1.5〜10倍まで増加される、請求項1〜7のいずれか一項に記載のプロセス。
- 前記セラミック体の表面上に金属を堆積させる工程を、工程b)の後にさらに含む、請求項1〜8のいずれか一項に記載のプロセス。
- アルミン酸塩が針状ムライトでなく、セラミック体が孔の少なくともいくつかの内部表面へ結合する針状ムライト結晶を有する、多孔性アルミン酸塩含有セラミック体。
- 前記アルミン酸塩が、アルミナ、チタン酸アルミニウム、非針状ムライト、コーディエライトおよびアルカリアルミノケイ酸塩から選択される、請求項10に記載のセラミック体。
- 前記出発のセラミック体が、孔の存在以外は、理論密度の少なくとも90%まで緻密化される、請求項10または11のいずれか一項に記載のセラミック体。
- 約30%〜85%の多孔率を有する、請求項10〜12のいずれか一項に記載のセラミック体。
- 前記孔のサイズが、水銀ポロシメータによって測定されたとき、5〜50ミクロンである、請求項10〜13のいずれか一項に記載のセラミック体。
- 軸方向に延長する多孔性壁との交差によって画成される1つまたは複数の軸方向に延長するセルを有するハニカムである、請求項10〜14のいずれか一項に記載のセラミック体。
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PCT/US2012/063894 WO2013078005A1 (en) | 2011-11-21 | 2012-11-07 | Method for making porous mullite-containing composites |
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JP2017160096A (ja) * | 2016-03-11 | 2017-09-14 | 日本特殊陶業株式会社 | 繊維強化多孔体 |
US10624928B2 (en) | 2014-10-06 | 2020-04-21 | Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation | Composition for treatment of joint disease and method thereof |
JP2022104774A (ja) * | 2020-12-29 | 2022-07-11 | 韓國セラミック技術院 | 輸送機関のブレーキ装置で発生した微小粒子状物質を捕集するための捕集装置 |
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CN106119966A (zh) * | 2016-06-17 | 2016-11-16 | 天津大学 | 在富铝纤维毡上原位生长莫来石晶须的方法 |
DE102021104560A1 (de) | 2021-02-25 | 2022-08-25 | Benteler Maschinenbau Gmbh | Ofenrolle und Rollenofen |
WO2023237054A1 (en) * | 2022-06-09 | 2023-12-14 | Basf Corporation | Gasoline particulate filter |
CN117003546B (zh) * | 2023-05-22 | 2024-06-18 | 重庆科技学院 | 一种发泡陶瓷及其制备方法 |
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- 2012-11-07 KR KR1020147013146A patent/KR20140093682A/ko not_active Application Discontinuation
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US10624928B2 (en) | 2014-10-06 | 2020-04-21 | Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation | Composition for treatment of joint disease and method thereof |
JP2017160096A (ja) * | 2016-03-11 | 2017-09-14 | 日本特殊陶業株式会社 | 繊維強化多孔体 |
JP2022104774A (ja) * | 2020-12-29 | 2022-07-11 | 韓國セラミック技術院 | 輸送機関のブレーキ装置で発生した微小粒子状物質を捕集するための捕集装置 |
JP7353321B2 (ja) | 2020-12-29 | 2023-09-29 | 韓國セラミック技術院 | 輸送機関のブレーキ装置で発生した微小粒子状物質を捕集するための捕集装置 |
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WO2013078005A1 (en) | 2013-05-30 |
US20150037531A1 (en) | 2015-02-05 |
JP6404716B2 (ja) | 2018-10-17 |
DE112012004833T5 (de) | 2014-09-04 |
KR20140093682A (ko) | 2014-07-28 |
US9764991B2 (en) | 2017-09-19 |
CN103958442A (zh) | 2014-07-30 |
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