The present invention relates to a glass fiberboard and to a production method therefor, and more specifically, to technology for providing a glass fiberboard for vacuum heat insulation and a production method therefor, which have outstanding initial heat insulation performance and economic advantages through application of an optimized inorganic binder.

A disclosed honeycomb structure includes at least one honeycomb unit having parallel through holes separated by partition walls and extending in the longitudinal direction, the honeycomb unit including a first sox-occluding agent, first inorganic particles, and an inorganic binder; and coating layers formed on the partition walls and including a second SOx-occluding agent and second inorganic particles. In the honeycomb structure, the basicity of the honeycomb unit is higher than that of the coating layers.

Provided are a honeycomb segment with spacers, capable of allowing a bonding layer between honeycomb segments to have desired thickness, and forming a honeycomb structure having little dimensional error; a method of producing such a honeycomb segment; a honeycomb structure; and a spacer forming device for producing a honeycomb segment with spacers. Spacer forming materials are applied to an outer peripheral surface 7s of an outer peripheral wall 7 of a honeycomb segment, and then height reference jigs 32 representing a reference height from the outer peripheral surface 7s are pressed against the outer peripheral surface 7s of the outer peripheral wall 7 at positions of both end faces of one end side and the other end side in an axial direction thereof. With the reference height of the height reference jigs 32 used as the reference height, a heating device 31 is pressed against the spacer forming materials in a thermally non-contact state with the height reference jigs 32, and then the spacer forming materials are solidified. Because the reference height of the height reference jigs 32 is used as the reference height, the spacers 11 can be formed in a predetermined height that is aligned with a specific height at the positions of the end faces.

A honeycomb structure includes a pillar honeycomb unit having plural cells that extend from a first end face to a second end face of the honeycomb structure. The cells are partitioned by cell walls formed in a longitudinal direction of the honeycomb structure. The cell walls include a NOx adsorbing material and an inorganic binder and support an ammonia adsorbing material. The amount of the ammonia adsorbing material supported on the cell walls varies between the first end portion and the second end portion.

Die Erfindung betrifft ein Verfahren zur Herstellung von wärmeisolierenden Formkörpern, sowie die Verwendung der wärmeisolierenden Formkörper zur Wärmedämmung.

Stable alkaline sols of anionic alumina hydrate may be made by calcining alumina trihydrate and milling the monohydrate produced under alkaline conditions. Alkaline sols containing both anionic alumina hydrate and anionic colloidal silica may be used for bonding refractory bodies.