Disclosed is a honeycomb structure configured to include a pillar-shaped honeycomb unit divided by cell walls. In the honeycomb structure, a pair of electrodes is arranged at the cell walls and/or a peripheral wall of the honeycomb unit, the cell walls of the honeycomb unit are composed of a ceramic aggregate and pores formed in the aggregate, and the cell walls contain a substance having an electrical resistivity lower than an electrical resistivity of ceramic forming the aggregate.

A bonding material for a honeycomb structure comprises inorganic particles in which D90/D10 is from 10 to 500, D10 is 100 µm or less and D90 is 4 µm or more, and the D10 and D90 are the values of 10% diameter and 90% diameter from a smaller particle diameter side, respectively, in volume-based integrated fractions of a particle diameter distribution measurement by a laser diffraction/scattering method.

A honeycomb structure includes at least one pillar shaped honeycomb unit including zeolite and an inorganic binder, the honeycomb unit including a plurality of cells extending from a first end face to a second end face of the honeycomb unit along its longitudinal directions, the cells being separated by cell walls. A thickness of the cell walls of the first end face side is greater than a thickness of the cell walls of a center part in the longitudinal direction of the honeycomb unit; and/or a pore rate of the cell walls of the first end face side is less than a pore rate of the cell walls of the center part in the longitudinal direction of the honeycomb unit.

A disclosed honeycomb structure includes a honeycomb unit having partition walls and plural through holes provided within the partition walls, the through holes extending in the direction substantially parallel to the longitudinal direction of the honeycomb unit, the honeycomb unit including SOx storage agent, inorganic particles, and inorganic binder, wherein

the following relationship is satisfied: $$\mathrm{Y}\mathrm{\geqq }\mathrm{-}\mathrm{26}\mathrm{X}\mathrm{+}\mathrm{40000}\left(\mathrm{0}\mathrm{<}\mathrm{X}\mathrm{\leqq }\mathrm{500}\right)$$

wherein

a symbol "X" [g] represents amount of SOx stored in the honeycomb structure; and

a symbol "Y" [m²/L] represents a specific surface area of the honeycomb structure when "X" [g] of SOx is stored in the honeycomb structure.

A ceramic fiber insulation material is disclosed. It is prepared from a precursor blend generally comprising a gelled colloid and a ceramic fiber filler. Other filler, e.g., other fiber of refractory material, is contemplated, particularly when mixed with ceramic fiber. The gelled colloid ban be formed such as by mixing a gelling agent with a colloid of inorganic oxide or by blending anionic colloid with cationic colloid. The gelling agent is typically nonionic and watersoluble. The blend is trowelable, pumpable and possesses excellent adhesive characteristics including. the ability to stick to most surfaces, including metal surfaces. The blend is also virtually shrink-free during drying and, after drying, can provide the insulation material.

A mixture suitable for firing to an oxide of the formula (II), Ba0.m(A1_2xCr_2y0₃), where 4.6 ≤ m ≤ 6.6; $\text{(x + y) = 1}$; and 0 ≤ y ≤ 0.5, said mixture comprising at least one of:

• (a) barium oxide;
• (b) a clean thermal precursor (as hereinbefore defined) of barium oxide, such as barium carbonate or barium hydroxide; and
• (c) barium mono-aluminate, Ba0.A1₂0₃;

• (A) alumina, A1₂0₃;
• (B) hydrated forms of alumina, such as boehmite, A1₂0₃.H₂0; and
• (C) a clean thermal precursor (as hereinbefore defined) of aluminium oxide;
  
  and, where y is not zero, with at least one of
• (D) chromium (III) oxide, Cr₂0₃;
• (E) hydrous chromium (III) oxide; and
• (F) a clean thermal precursor (as hereinbefore defined) of chromium (III) oxide,

Also disclosed is a grain mix suitable for forming refractory and/or ceramic articles prepared by comminuting either or both of:

• (a) The above mixture and (b) an oxide of the formula (II), Ba0.m(A1_2xCr_2y0₃), where 4.6 ≤ m ≤ 6.6; $\text{(x + y) = 1}$; and 0 ≤ y ≤ 0.5.

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