IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0936517
(2001-09-14)
|
우선권정보 |
JP-0008288 (2000-01-17) |
국제출원번호 |
PCT/JP01/00078
(2001-01-11)
|
국제공개번호 |
WO01/53233
(2001-07-26)
|
발명자
/ 주소 |
- Yamamoto, Yoshinori
- Noda, Naomi
- Harada, Takashi
|
출원인 / 주소 |
|
대리인 / 주소 |
Parkhurst & Wendel, L.L.P.
|
인용정보 |
피인용 횟수 :
14 인용 특허 :
6 |
초록
▼
A honeycomb structure having, in the axial direction, a number of through-channels separated by partition walls, which honeycomb structure contains refractory particles and a vitreous component and is porous. Although the honeycomb structure contains refractory particles such as silicon carbide part
A honeycomb structure having, in the axial direction, a number of through-channels separated by partition walls, which honeycomb structure contains refractory particles and a vitreous component and is porous. Although the honeycomb structure contains refractory particles such as silicon carbide particles or the like, it can be produced at a relatively low firing temperature; therefore, the honeycomb structure has a low production cost and a high yield and can be provided at a low price.
대표청구항
▼
1. A honeycomb structure having, in the axial direction, a number of through-channels separated by partition walls, characterized in that honeycomb structure contains refractory particles and a vitreous component and is porous, wherein the refractory particles are bound by the vitreous component in
1. A honeycomb structure having, in the axial direction, a number of through-channels separated by partition walls, characterized in that honeycomb structure contains refractory particles and a vitreous component and is porous, wherein the refractory particles are bound by the vitreous component in such a state that the particles used as a raw material for the refractory particles retain their shapes, and wherein the thickness of the partition walls and the (porosity of the honeycomb structure satisfy the following relationships: thickness of partition walls (μm)≥porosity (%)×4 and thickness of partition walls (μm)≤porosity (%)×20. 2. A honeycomb structure according to claim 1, wherein the refractory particles are silicon carbide particles. 3. A honeycomb structure according to claim 1, which is used as a filter for capturing and removing the particulate matter present in a dust-containing fluid. 4. A honeycomb structure according to claim 1, which has a porosity of 30 to 90%. 5. A honeycomb structure according to claim 1, which has an average pore diameter of 2 to 50 μm. 6. A honeycomb structure according to claim 1, wherein the partition walls have a thickness of 102 to 1,270 μm. 7. A honeycomb structure according to claim 1, wherein the thickness of the partition walls and the porosity of the honeycomb structure satisfy the following relationship: thickness of partition walls (μm)≥porosity (%)×5. 8. A honeycomb structure according to claim 1, which has a through-channels density of 0.7 to 155 cells/cm2. 9. A process for producing a honeycomb structure, characterized by adding a vitrifying material and an organic binder to refractory particles as a raw material wherein the vitrifying material is added in an amount of 3 to 30 g per m2of the surface area of the refractory particles, mixing and kneading them to obtain a readily formable bullet, forming the readily formable bullet into a honeycomb shape material, calcinating the honeycomb shaped material to remove the organic binder contained therein, and then firing the calcinated material to obtain a porous honeycomb structure. 10. A process according to claim 9 wherein the refractory particles as a raw material is silicon carbide particles. 11. A process according to claim 9, wherein the refractory particles as a raw material has an average particle diameter of 2 to 4 times the average pore diameter of the honeycomb structure obtained finally. 12. A process according to claim 9, wherein the refractory particles as a raw material contain impurities in an amount of 5% by weight or less. 13. A process according to claim 9, wherein the vitrifying material contains at least one kind of oxide selected from the group consisting of SiO2,Al2O3,B2O3and Na2O. 14. A process according to claim 9, wherein the vitrifying material has an average particle diameter of 50% or less of the average particle diameter of the refractory particles as an aggregate. 15. A process according to claim 9, wherein the organic binder is added in an amount of 2 to 30% by weight relative to the total amount of the refractory particles as a raw material and the vitrifying material. 16. A process according to claim 9, wherein while mixing and kneading the raw material to obtain the readily formable bullet, adding a pore forming material in an amount of 30% by weight or less relative to the total amount of the refractory particles as a raw material and the vitrifying material. 17. A process according to claim 9, wherein the calcination of the molded material is carried out at a temperature lower than the melting temperature of the vitrifying material. 18. A process according to claim 9, wherein the firing is carried out at a temperature between 1,000 and 1,600° C.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.