JP2006089329A - コーディエライト質ハニカム構造体の製造方法 - Google Patents
コーディエライト質ハニカム構造体の製造方法 Download PDFInfo
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Abstract
【解決手段】アルミナ源原料とシリカ源原料とマグネシア源原料とを加えてコーディエライト化原料を得、得られたコーディエライト化原料を用いて坏土を得、得られた坏土をハニカム形状に押出し成形してハニカム成形体を得、得られたハニカム成形体を乾燥してハニカム乾燥体を得、得られたハニカム乾燥体を焼成してコーディエライト質ハニカム構造体を製造するコーディエライト質ハニカム構造体の製造方法であって、少なくともアルミナ源原料として、円形度0.7以上、且つ平均粒子径が1〜10μmの第一アルミナ源原料を、コーディエライト化原料の全質量に対して10質量%以上加えてコーディエライト化原料を得るコーディエライト質ハニカム構造体の製造方法。
【選択図】なし
Description
SD=4πS/L2 …(1)
(但し、SD:円形度、S:投影面積、L:周囲長)
Po=V/(V+1/dt)×100 …(2)
(但し、Po:気孔率、V:全細孔容積、dt:真比重)
本実施例においては、コーディエライト質ハニカム構造体として、セルの一方の開口部と他方の開口部と互い違いに目封止する目封止部をさらに備えたコーディエライト質ハニカム構造体(ハニカムフィルタ)を製造した。具体的な製造方法としては、まず、タルク(平均粒子径21μm、円形度0.72)42質量%、カオリン(平均粒子径11μm、円形度0.68)20質量%、アルミナA(平均粒子径2.4μm、円形度0.71)25質量%、シリカ(平均粒子径25μm、円形度0.84)13質量%の割合で混合してコーディエライト化原料を調製した。本実施例においては、アルミナAが第一アルミナ源原料である。
アルミナAに変えて、表1記載のアルミナB〜Fを用いたこと以外は、実施例1と同様にしてハニカムフィルタを得、得られたハニカムフィルタにおいて、気孔の開口面積の割合(%)と、圧力損失(KPa)と、圧縮強度(MPa)と、気孔率(%)と、気孔径(μm)と、熱膨張係数(×10-6/℃)とを測定した。それぞれの測定結果を表1に示す。なお、それぞれの測定方法については、実施例1と同様である。
アルミナAに変えて、表1記載のアルミナCを10質量%及びアルミナGを15質量%用いたこと以外は、実施例1と同様にしてハニカムフィルタを得、得られたハニカムフィルタにおいて、気孔の開口面積の割合(%)と、圧力損失(KPa)と、圧縮強度(MPa)と、気孔率(%)と、気孔径(μm)と、熱膨張係数(×10-6/℃)とを測定した。それぞれの測定結果を表1に示す。なお、それぞれの測定方法については、実施例1と同様である。本実施例においては、アルミナCが第一アルミナ源原料である。
アルミナAに変えて、表1記載のアルミナHを用いたこと以外は、実施例1と同様にしてハニカムフィルタを得、得られたハニカムフィルタにおいて、気孔の開口面積の割合(%)と、圧力損失(KPa)と、圧縮強度(MPa)と、気孔率(%)と、気孔径(μm)と、熱膨張係数(×10-6/℃)とを測定した。それぞれの測定結果を表1に示す。なお、それぞれの測定方法については、実施例1と同様である。
アルミナAに変えて、表1記載のアルミナCを5質量%及びアルミナGを20質量%用いたこと以外は、実施例1と同様にしてハニカムフィルタを得、得られたハニカムフィルタにおいて、気孔の開口面積の割合(%)と、圧力損失(KPa)と、圧縮強度(MPa)と、気孔率(%)と、気孔径(μm)と、熱膨張係数(×10-6/℃)とを測定した。それぞれの測定結果を表1に示す。なお、それぞれの測定方法については、実施例1と同様である。
本実施例においては、コーディエライト化原料を、タルク(平均粒子径21μm、円形度0.72)37質量%、カオリン(平均粒子径11μm、円形度0.68)19質量%、水酸化アルミニウムA(平均粒子径2.8μm、円形度0.72)33質量%、シリカ(平均粒子径25μm、円形度0.84)11質量%の割合で混合して調製した以外は、実施例1の実施例1と同様にしてハニカムフィルタを得、得られたハニカムフィルタにおいて、気孔の開口面積の割合(%)と、圧力損失(KPa)と、圧縮強度(MPa)と、気孔率(%)と、気孔径(μm)と、熱膨張係数(×10-6/℃)とを測定した。それぞれの測定結果を表1に示す。なお、それぞれの測定方法については、実施例1と同様である。本実施例においては、水酸化アルミニウムAが第一アルミナ源原料である。
水酸化アルミニウムAに変えて、表1記載の水酸化アルミニウムBを用いたこと以外は、実施例1と同様にしてハニカムフィルタを得、得られたハニカムフィルタにおいて、気孔の開口面積の割合(%)と、圧力損失(KPa)と、圧縮強度(MPa)と、気孔率(%)と、気孔径(μm)と、熱膨張係数(×10-6/℃)とを測定した。それぞれの測定結果を表1に示す。なお、それぞれの測定方法については、実施例1と同様である。
タルク(平均粒子径21μm、円形度0.72)42質量%、表2に記載のそれぞれのカオリン(カオリンA〜C)20質量%、アルミナ(平均粒子径4.5μm、円形度0.65)25質量%、シリカ(平均粒子径25μm、円形度0.84)13質量%の割合で混合してコーディエライト化原料を調製したこと以外は、実施例1と同様にしてハニカムフィルタを得、得られたハニカムフィルタにおいて、気孔の開口面積の割合(%)と、圧力損失(KPa)と、圧縮強度(MPa)と、気孔率(%)と、気孔径(μm)と、熱膨張係数(×10-6/℃)とを測定した。それぞれの測定結果を表2に示す。なお、それぞれの測定方法については、実施例1と同様である。本実施例においては、カオリンA〜Cが第一アルミナ源原料である。
カオリンAに変えて、表2記載のカオリンDを用いたこと以外は、実施例9と同様にしてハニカムフィルタを得、得られたハニカムフィルタにおいて、気孔の開口面積の割合(%)と、圧力損失(KPa)と、圧縮強度(MPa)と、気孔率(%)と、気孔径(μm)と、熱膨張係数(×10-6/℃)とを測定した。それぞれの測定結果を表2に示す。なお、それぞれの測定方法については、実施例1と同様である。
Claims (6)
- アルミナ源原料とシリカ源原料とマグネシア源原料とを加えてコーディエライト化原料を得、得られた前記コーディエライト化原料を用いて坏土を得、得られた前記坏土をハニカム形状に押出し成形して、隔壁によって複数のセルが区画形成されたハニカム成形体を得、得られた前記ハニカム成形体を乾燥してハニカム乾燥体を得、得られた前記ハニカム乾燥体を焼成してコーディエライト質ハニカム構造体を製造するコーディエライト質ハニカム構造体の製造方法であって、
少なくとも前記アルミナ源原料として、円形度0.7以上、且つ平均粒子径が1〜10μmの第一アルミナ源原料を、前記コーディエライト化原料の全質量に対して10質量%以上加えて前記コーディエライト化原料を得るコーディエライト質ハニカム構造体の製造方法。 - 前記第一アルミナ源原料として、アルミナ及び/又は水酸化アルミニウムの粒子を用いる請求項1に記載のコーディエライト質ハニカム構造体の製造方法。
- 前記第一アルミナ源原料が、円形度0.8以上のものである請求項1又は2に記載のコーディエライト質ハニカム構造体の製造方法である。
- 前記第一アルミナ源原料が、5μm以上の粒子を前記第一アルミナ源原料の全質量に対して10質量%以上含むものである請求項1〜3のいずれかに記載のコーディエライト質ハニカム構造体の製造方法。
- アルミナ源原料とシリカ源原料とマグネシア源原料とを加えてコーディエライト化原料を得、得られた前記コーディエライト化原料を用いて坏土を得、得られた前記坏土をハニカム形状に押出し成形して、隔壁によって複数のセルが区画形成されたハニカム成形体を得、得られた前記ハニカム成形体を乾燥してハニカム乾燥体を得、得られた前記ハニカム乾燥体を焼成して得られた、コーディエライト質ハニカム構造体であって、
前記コーディエライト化原料が、少なくとも前記アルミナ源原料として、円形度0.7以上、且つ平均粒子径が1〜10μmの第一アルミナ源原料を、前記コーディエライト化原料の全質量に対して10質量%以上加えて得られたものであるコーディエライト質ハニカム構造体。 - 前記コーディエライト質ハニカム構造体を構成する前記隔壁が多孔質体であり、前記コーディエライト質ハニカム構造体を構成する隔壁の表面を平面とした場合における全面積に対する、前記隔壁の表面に形成された気孔の開口部の面積の割合が、30〜50%である請求項5に記載のコーディエライト質ハニカム構造体。
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CN201310636826.2A CN103693948B (zh) | 2004-09-24 | 2005-09-22 | 堇青石质蜂窝结构体的制造方法 |
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JP2014166635A (ja) * | 2009-09-04 | 2014-09-11 | Hitachi Metals Ltd | セラミックハニカム構造体の製造方法 |
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