An object of the present invention is to obtain a cement-based calcined board-shaped construction material having improved impact resistance.

The cement-based calcined board-shaped construction material of the present invention is characterized by being produced by adding 0.5 to 5 wt % of a ceramic inorganic fiber and/or a mineral inorganic fiber to 100 wt % of a compound comprising 5 to 40 wt % of Portland cement, 5 to 30 wt % of a glass powder, and a remainder occupied by a refractory aggregate mainly composed of a silica-alumina refractory raw material, kneading the resulting material, then shaping the kneaded material into an elongated board shape by extrusion, and subsequently calcining the shaped material.

Also, it is the cement-based calcined board-shaped construction material which is produced by sticking a glass fiber sheet to the rear side of the cement-based calcined board-shaped construction material.

An insulating product for the refractory industry or an insulating material as intermediate for production of such a product, and a corresponding insulating material/insulating product are provided. Likewise the use of a matrix encapsulation process in the production of an insulating product for the refractory industry and a corresponding insulating product and/or an insulating material as intermediate for production of such a product are provided.

The invention relates to a method for preparing synthetic mineral particles with formula (Al.sub.yM.sub.1-y).sub.2(Si.sub.xGe.sub.1-x).sub.2O.sub.5(OH).sub.4, wherein M designates at least one trivalent metal selected from the group made up of gallium and the rare earths, which comprises the following steps: preparing a gel which is a precursor of said synthetic mineral particles by a co-precipitation reaction of at least one salt of metal selected among aluminium and M with at least one silicon source selected from the group made up of potassium metasilicate, sodium metasilicate, potassium metagermanate and sodium metagermanate, the molar ratio of (Al.sub.yM.sub.1-y) to (Si.sub.xGe.sub.1-x) during the preparation of said precursor gel being equal to 1, at least one base being added during said co-precipitation reaction; and performing a solvothermal treatment of said precursor gel at a temperature of 250° C. to 600° C.

A honeycomb structure including: a honeycomb structure body having porous partition walls which define a plurality of cells extending from an inflow end face to an outflow end face to form through channels for a fluid, and a first circumferential wall which is disposed in at least a part of a circumference of the partition walls, and a second circumferential wall disposed to surround an outer side of the honeycomb structure body, wherein the honeycomb structure body does not have an interface between the partition walls and the first circumferential wall, and in a face perpendicular to an extending direction of the cells, a maximum thickness of the first circumferential wall is from 0.1 to 0.3 mm.

A ceramic honeycomb structure having a web structure including a plurality of intersecting channel walls forming channels. The ceramic honeycomb structure has a total porosity greater than or equal to about 55%, an average channel wall thickness less than or equal to about 150 μm, a median pore diameter greater than or equal to about 10 μm, a d.sub.f less than or equal to about 0.45, where d.sub.f=(d.sub.50−d.sub.10)/d.sub.50, and a strength (MOR/CFA) greater than or equal to about 900 psi. A method of manufacturing a ceramic honeycomb structure by mixing a ceramic precursor batch composition having a median particle diameter less than or equal to about 10 μm and at least one starch-based pore former having a median particle diameter greater than or equal to about 10 μm. The method also includes forming a mixture of ceramic precursor batch composition and a starch-based pore former into a green ceramic structure having a web structure, and firing the green ceramic structure to yield a ceramic honeycomb structure.

Sintered bead that has a crystalline composition, as percentages by weight based on the total weight of the crystalline phases: zircon<25%; 50%≤cubic zirconia+tetragonal zirconia≤95%, the cubic zirconia content being greater than 50%, the cubic zirconia content being the (cubic zirconia/(cubic zirconia+tetragonal zirconia) ratio by weight); 0≤monoclinic zirconia≤(10−0.2*tetragonal zirconia) %; 5%≤corundum≤50%; crystalline phases other than zircon, cubic zirconia, tetragonal zirconia, monoclinic zirconia and corundum<10%; and the following chemical composition, as percentages by weight based on the oxides: 34%≤ZrO.sub.2+HfO.sub.2, ZrO.sub.2+HfO.sub.2 being the remainder to 100%; HfO.sub.2≤4.0%; 0.5%≤SiO.sub.2≤14.1%; 4.5%≤Al.sub.2O.sub.3≤49.6%; 2.75%≤Y.sub.2O.sub.3≤22.8%; MgO≤5%; CaO≤2%; oxides other than ZrO.sub.2, HfO.sub.2, SiO.sub.2, Al.sub.2O.sub.3, MgO, CaO and Y.sub.2O.sub.3<5.0%.

The present invention relates to a composite material comprising wollastonite fibres embedded within a ceramic matrix. The wollastonite fibres are bonded to the ceramic matrix by a glassy bonding phase comprising a glass component comprising at least 80 wt % of oxides of calcium, silicon and aluminium. The material is used in the processing of molten metal, e.g. as a pump, degasser, flux injector or scrap submergence device.

A sintered rod-shaped proppant and anti-flowback agent possesses high strength and high conductivity. The sintered rods comprise between about 0.2% by weight and about 4% by weight aluminum titanate. In some embodiments, the sintered rods are made by mixing bauxitic and non-bauxitic sources of alumina that may also contain several so-called impurities (such as TiO.sub.2), extruding the mixture, and sintering it. The starting material may optionally be milled to achieve better compacity and crush resistance in the final sintered rod. A fracturing fluid may comprise the sintered rods alone or in combination with a proppant, preferably a proppant of a different shape.

A ceramic filter having a pillar-shaped honeycomb structure, wherein when observing a plurality of pores from a surface of partition walls with a laser microscope and plotting an equivalent circle diameter (μm) of each pore on an X-axis and a pore depth (μm) of each pore on a Y-axis on a two-dimensional coordinate system, a slope of a regression line (y/x) obtained by a least squares method in a range of 20≤x≤40 is 0 to 0.20, an average value of the pore depth of the plurality of pores is 2.5 μm to 5.0 μm, and a number density of the plurality of pores is 600/mm.sup.2 to 2450/mm.sup.2.

A method is described to make a metal-containing non-amorphous hard-carbon composite material that is synthesized from furan-ring containing compounds. The metals described in the process include lithium and transition metals, including transition metal oxides like lithium titanates. The non-amorphous hard-carbon component of the metal-containing non-amorphous hard-carbon composite material is characterized by a d.sub.002 peak—in the X-ray diffraction patterns—that corresponds to an interlayer spacing of >3.6 Å, along with a prominent D-band peak in the Raman spectra. These metal-containing hard-carbon composites are used for constructing electrodes for Li-ion batteries and Li-ion capacitors.