Honeycomb structural body and sealing material layer

1. A honeycomb structural body, comprising:

a plurality of pillar-shaped porous ceramic members, each of the ceramic members formed by arranging a plurality of through-holes side by side through cell walls in the longitudinal direction of the ceramic member; and

a sealing material layer interposed between the adjacent ceramic members, so that the plurality of porous ceramic members are bonded together,

wherein the plurality of porous ceramic members and the sealing material layer interposed therebetween are subjected to calcinining, such that the resulting sealing material layer has a specific surface area of approximately 10 to 100 m 2 /g.

2. The honeycomb structural body according to claim 1 , wherein a sealing material layer is provided on an outermost peripheral portion of a honeycomb block formed by bonding a plurality of the ceramic members.

3. The honeycomb structural body according to claim 1 or 2 , wherein the surface of the ceramic member in contact with the sealing material layer has a surface roughness Ra of approximately 1.0 to 30 μm.

4. The honeycomb structural body according to claim 1 , wherein the sealing material layer is an adhesive.

5. The honeycomb structural body according to claim 1 or 2 , wherein the sealing material layer comprises an inorganic binder and at least one component chosen from inorganic particles and inorganic fibers.

6. The honeycomb structural body according to claim 1 or 2 , wherein the ceramic member comprises alumina.

7. The honeycomb structural body according to claim 1 or 2 , wherein it is used as an exhaust gas converting apparatus of vehicles.

8. The honeycomb structural body according to claim 1 or 2 , wherein a cross sectional area of the ceramic member perpendicular to the longitudinal direction of the ceramic member is approximately 5-50 cm 2 .

9. The honeycomb structural body according to claim 1 or 2 , wherein a ratio of the sum of the cross sectional area of the ceramic members perpendicular to the longitudinal direction of the ceramic member to the cross sectional area of the honeycomb structural body perpendicular to the longitudinal direction of the ceramic member is approximately 85% or more.

10. The honeycomb structural body according to claim 1 or 2 , wherein the porous ceramic member comprises inorganic material of a first embodiment and an inorganic material of a second embodiment.

11. The honeycomb structural body according to claim 10 , wherein the inorganic material of the second embodiment has an aspect ratio of approximately 2 to 1000.

12. The honeycomb structural body according to claim 10 , wherein the inorganic material of the second embodiment has a particle size approximately 5 or more times that of the inorganic material of the first embodiment.

13. The honeycomb structural body according to claim 10 , wherein the amount of the inorganic material of the first embodiment compounded is approximately 30 to 97 mass %.

14. The honeycomb structural body according to claim 10 , wherein the amount of the inorganic material of the second embodiment compounded is approximately 3 to 70 mass %.

15. The honeycomb structural body according to claim 10 , further comprising an inorganic binder of approximately 50 parts by mass or less based on 100 parts by mass the total amount of the inorganic material of the first embodiment and the inorganic material of the second embodiment.

16. The honeycomb structural body according to claim 1 , wherein the ceramic member is fired at a temperature of approximately 600 to 1200° C.

17. The honeycomb structural body according to claim 1 , wherein the sealing material layer has a thickness of approximately 0.5 to 2 mm.

18. The honeycomb structural body according to claim 2 , wherein the thickness of the sealing material layer provided on the outermost peripheral portion of the honeycomb block is approximately 0.1 to 2 mm.

19. The honeycomb structural body according to claim 1 , wherein the cell wall has a thickness of approximately 0.05 to 0.35 mm.

20. The honeycomb structural body according to claim 1 , wherein a number of the through-holes per unit cross sectional area is approximately 15.5 to 186 holes/cm 2 .

21. A sealing material layer for a honeycomb structural body, said sealing material layer having a specific surface area of approximately 10 to 100 m 2 /g after calcination,

wherein said sealing material layer is interposed between two adjacent pillar-shaped porous ceramic members to bond the ceramic members together.

22. The sealing material layer for a honeycomb structural body according to claim 21 , wherein each ceramic member is formed by arranging a plurality of through-holes side by side through cell walls the longitudinal direction of the ceramic member.

23. The sealing material layer for a honeycomb structural body according to claim 21 , wherein it is used for coating the outer peripheral portion of a honeycomb block formed by binding together a plurality of pillar-shaped porous ceramic members, each ceramic member is formed by arranging a plurality of through-holes side by side through cell walls in the longitudinal direction of the ceramic member.

24. The sealing material layer according to claim 21 , comprising an inorganic binder and at least one component chosen from inorganic particles and inorganic fibers.

25. The sealing material layer according to claim 21 , said sealing material layer having a thickness approximately 0.5 to 2 mm.

26. The sealing material layer according to claim 23 , wherein the thickness of the sealing material layer coated on the outermost peripheral portion of the honeycomb block is approximately 0.1 to 2 mm.