KR970064718A - 다공성 유출 성형체 및 이의 제조방법 - Google Patents
다공성 유출 성형체 및 이의 제조방법 Download PDFInfo
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- KR970064718A KR970064718A KR1019970009908A KR19970009908A KR970064718A KR 970064718 A KR970064718 A KR 970064718A KR 1019970009908 A KR1019970009908 A KR 1019970009908A KR 19970009908 A KR19970009908 A KR 19970009908A KR 970064718 A KR970064718 A KR 970064718A
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Abstract
본 발명은 디젤 엔진의 배출 가스로부터의 디젤 매열 입자의 제거를 위해서 특별하게 설계된 다공성 유출 성형체에 관한 것이다. 이는, 탄화규소로 이루어진 교호적으로 밀집된 벌집 형태의 본체를 포함하며, 벽 두께가 1.25±0.5mm이고 다공성이 55 내지 60%이며 평균 세공 직경이 25 내지 70㎛이고 비투과율이 20 내지 100nPm임을 특징으로 한다.
제조방법에 있어서, 출발 물질인 규소 분말, 또는 규소 분말과 탄화규소 분말 분획 및/또는 탄소 분말 분획의 혼합물을 코크스화될 수 있는 유기 결합제와 배합시켜 미가공체로 성형시킨다. 이어서, 이를 불활성 대기중에서 코크스화 하소처리하고, 이러한 방식으로 수득된 성형체를 질소 가스 또는 질소 함유 불활성 가스의 존재하에 유리 규소가 하소반응에서 탄소와 함께 전환되어 탄화규소를 형성하는 온도로 가열한다. 추가로, 재결정화 하소온도는 2000℃보다 높게 설정한다.
Description
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Claims (24)
- 디젤 엔진의 배출 가스로부터의 디젤 매연 입자의 제거를 위해서 특별하게 설계되고, 탄화규소로 이루어진 교호적으로 밀집된 벌집 형태의 본체를 포함하며, 벽 두께가 1.25±0.5mm이고 다공성이 55 내지 60%이며 평균 세공 직경이 25 내지 70㎛이고 비투과율이 20 내지 100nPm임을 특징으로 하는, 다공성 유출 성형체.
- 제1항에 있어서, 성형체의 비전기저항 r이 하기 수학식(1)에 상응하는 rmin내지 rmax로 설정됨을 특징으로 하는 성형체.상기 수학식에서, Pset는 소요되는 전기 열 용량이고, Imax는 최대로 허용되는 전류 강도이고, Umax는 최대로 허용되는 전압이고, Aq는 성형체의 전류 수송 단면적이고, 1은 성형체의 전류 수송 종면적이고, 이때 Pset는 Umax×Imax이하이다.
- 제2항에 있어서, 성형체의 비전기저항 r이 0.1 내지 3Ω×cm임을 특징으로 하는 성형체.
- 제1항 내지 제3항 중의 어느 한 항에 있어서, 성형체가 주기율표의 제3 및 제5주족 또는 아족의 화합물 및/또는 원소를 함유함을 특징으로 하는 성형체.
- 제4항에 있어서, 성형체가 붕소원자를 0.05 내지 1.0중량%의 양으로 함유함을 특징으로 하는 성형체.
- 출발 물질인 규소 분말, 또한 규소 분말과 탄화규소 분말 분획 및/또는 탄소 분말 분획의 혼합물을 코크스화될 수 있는 유기 결합제와 배합시켜 미가공체 압출 성형시킨 다음, 이를 불활성 가스 대기중에서 코크스화 하소처리하고, 이러한 방식으로 수득된 성형체를 질소 가스 또는 질소 함유 불활성 가스의 존재하에 유리규소가 반응 하소에서 탄소와 함께 전환되어 탄화규소를 형성하기에 충분한 온도로 가열하고, 재결정화 하소가 2000℃보다 높은 온도에서 수행됨을 특징으로 하는, 다공성 유출 성형체의 제조방법.
- 제6항에 있어서, 재결정화 하소가 2100 내지 2300℃에서 수행됨을 특징으로 하는 방법.
- 제6항 또는 제7항에 있어서, 성형체를 연속적으로 재결정화 하소 온도하에 둠을 특징으로 하는 방법.
- 제6항 또는 제7항에 있어서, 반응 하소를 우선 수행한 다음, 재결정화 하소를 수행함을 특징으로 하는 방법.
- 제9항에 있어서, 반응 하소 직후에 재결정화 하소를 수행함을 특징으로 하는 방법.
- 제6항 내지 제10항 중의 어느 한 항에 있어서, 반응 하소가 1400 내지 1900℃, 바람직하게는 1700 내지 1900℃에서 수행됨을 특징으로 하는 방법.
- 제6항 내지 제11항 중의 어느 한 항에 있어서, 출발물질인 분말에 함유된 제1탄화규소의 분율이 25중량%이하임을 특징으로 하는 방법.
- 제6항 내지 제12항 중의 어느 한 항에 있어서, 탄수화물족 화합물로부터의 화합물 또는 이들 화합물의 변형물이 결합제로서 사용됨을 특징으로 하는 방법.
- 제13항에 있어서, 변형된 전분이 결합제로서 사용됨을 특징으로 하는 방법.
- 제6항 내지 제14항 중의 어느 한 항에 있어서, 결합제가 분말 형태로서 출발물질인 분말에 가해짐을 특징으로 하는 방법.
- 제6항 내지 제11항 중의 어느 한 항에 있어서, 실온에서 액체인 결합제가 사용됨을 특징으로 하는 방법.
- 제6항 내지 제13항 중의 어느 한 항에 있어서, 수용성 결합제가 사용됨을 특징으로 하는 방법.
- 제6항 내지 제14항 중의 어느 한 항에 있어서, 사용되는 결합제의 분율이, 결합제에 함유된 탄소를 포함하는 모든 탄소가 출발 분말중의 유리 규소에 대하여 0.8 내지 1.2의 화학양론비로 존재하도록 조정됨을 특징으로 하는 방법.
- 제6항 내지 제15항 중의 어느 한 항에 있어서, 전기 전도율을 증가시키기 위한 첨가제가, 전기 저항이 0.1 내지 3Ω×cm이도록 하는 양으로 가해짐을 특징으로 하는 방법.
- 제19항에 있어서, 주기율표의 제3 및 제5주족 또는 아족으로부터의 하나 이상의 화합물 및/또는 한 원소가 첨가제로서 사용됨을 특징으로 하는 방법.
- 제20항에 있어서, 붕소 화합물이 첨가제로서 사용됨을 특징으로 하는 방법.
- 제21항에 있어서, 붕소 화합물을, 출발 혼합물 중에 붕소원소가 0.05 내지 1.0중량% 존재할 수 있는 양으로 가함을 특징으로 하는 방법.
- 제19항 내지 제22항 중의 어느 한 항에 있어서, 첨가제를, 입자 크기가 10㎛를 초과하지 않는 분말 형태로 가함을 특징으로 하는 방법.
- 제6항 내지 제23항 중의 어느 한 항에 있어서, 평균 입자 크기는 10 내지 70㎛의 범위인 유리 규소 및/또는 탄소를 사용함을 특징으로 하는 방법.※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP96104647.1 | 1996-03-23 | ||
EP96104647A EP0796830B1 (de) | 1996-03-23 | 1996-03-23 | Poröser durchströmbarer Formkörper sowie Verfahren zu seiner Herstellung |
Publications (2)
Publication Number | Publication Date |
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KR970064718A true KR970064718A (ko) | 1997-10-13 |
KR100484558B1 KR100484558B1 (ko) | 2005-08-04 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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KR1019970009908A KR100484558B1 (ko) | 1996-03-23 | 1997-03-22 | 다공성투과 성형체 및 이의 제조방법 |
Country Status (8)
Country | Link |
---|---|
US (2) | US5853444A (ko) |
EP (1) | EP0796830B1 (ko) |
JP (1) | JP4029175B2 (ko) |
KR (1) | KR100484558B1 (ko) |
AT (1) | ATE222576T1 (ko) |
DE (1) | DE59609574D1 (ko) |
ES (1) | ES2180668T3 (ko) |
PT (1) | PT796830E (ko) |
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-
1996
- 1996-03-23 PT PT96104647T patent/PT796830E/pt unknown
- 1996-03-23 AT AT96104647T patent/ATE222576T1/de not_active IP Right Cessation
- 1996-03-23 DE DE59609574T patent/DE59609574D1/de not_active Expired - Fee Related
- 1996-03-23 EP EP96104647A patent/EP0796830B1/de not_active Expired - Lifetime
- 1996-03-23 ES ES96104647T patent/ES2180668T3/es not_active Expired - Lifetime
-
1997
- 1997-03-21 US US08/821,871 patent/US5853444A/en not_active Expired - Fee Related
- 1997-03-22 KR KR1019970009908A patent/KR100484558B1/ko not_active IP Right Cessation
- 1997-03-24 JP JP06978097A patent/JP4029175B2/ja not_active Expired - Fee Related
-
1998
- 1998-08-12 US US09/135,544 patent/US6017473A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
KR100484558B1 (ko) | 2005-08-04 |
US6017473A (en) | 2000-01-25 |
PT796830E (pt) | 2003-01-31 |
ES2180668T3 (es) | 2003-02-16 |
EP0796830A1 (de) | 1997-09-24 |
JPH1015323A (ja) | 1998-01-20 |
US5853444A (en) | 1998-12-29 |
JP4029175B2 (ja) | 2008-01-09 |
EP0796830B1 (de) | 2002-08-21 |
DE59609574D1 (de) | 2002-09-26 |
ATE222576T1 (de) | 2002-09-15 |
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