A manufacturing method of a low heat-conducting magnesium-aluminium spinel brick includes: (1) evenly mixing sintered magnesia, fused magnesia, magnesium-aluminium spinel and corundum to prepare flame retardant coating raw material mixed powder, adding naphthalene binder to the flame retardant coating raw material mixed powder to prepare the flame retardant coating raw materials after evenly mixing; (2) evenly mixing forsterite, fayalite and magnesia, adding the naphthalene binder to the mixed powder, moulding, drying, and then burning to obtain aggregate composite hortonolite raw materials; adding the naphthalene binder to the aggregate composite hortonolite having granularity ≤5 mm to prepare the thermal insulating layer raw materials after evenly mixing; (3) spacing and loading the flame retardant coating raw materials and the thermal insulating layer raw materials in a mold, pressing into green bricks, keeping the green bricks at a temperature of 110° C. for 24 hours, drying, and burning into magnesium-aluminium spinel bricks.

A manufacturing method of a low heat-conducting magnesium-aluminium spinel brick includes: (1) evenly mixing sintered magnesia, fused magnesia, magnesium-aluminium spinel and corundum to prepare flame retardant coating raw material mixed powder, adding naphthalene binder to the flame retardant coating raw material mixed powder to prepare the flame retardant coating raw materials after evenly mixing; (2) evenly mixing forsterite, fayalite and magnesia, adding the naphthalene binder to the mixed powder, moulding, drying, and then burning to obtain aggregate composite hortonolite raw materials; adding the naphthalene binder to the aggregate composite hortonolite having granularity ≤5 mm to prepare the thermal insulating layer raw materials after evenly mixing; (3) spacing and loading the flame retardant coating raw materials and the thermal insulating layer raw materials in a mold, pressing into green bricks, keeping the green bricks at a temperature of 110° C. for 24 hours, drying, and burning into magnesium-aluminium spinel bricks.

A method for producing forsterite microparticles having a primary particle size of 1, to 50 nm, as determined through electron microscopy. The method includes spray-drying, in an atmosphere of 50° C. or higher and lower than 300° C., a solution containing a water-soluble magnesium salt and colloidal silica at a mole ratio of magnesium atoms to silicon atoms (Mg/Si) of 2; and subsequently, firing the spray-dried product in air at 800 to 1,000° C.

A method for producing forsterite microparticles having a primary particle size of 1, to 50 nm, as determined through electron microscopy. The method includes spray-drying, in an atmosphere of 50° C. or higher and lower than 300° C., a solution containing a water-soluble magnesium salt and colloidal silica at a mole ratio of magnesium atoms to silicon atoms (Mg/Si) of 2; and subsequently, firing the spray-dried product in air at 800 to 1,000° C.

A sensor component for application temperatures above 700° C., especially electrical and/or electrochemical sensor component is provided. The sensor component has a feedthrough element, the feedthrough element having a through-hole with a through-hole inner wall extending from one surface of the feedthrough element to the other surface of the feedthrough element, wherein an insulation element is located within a through-hole of the feedthrough element, the through-hole has a diameter Da, the insulation element has a Volume V and a height H which are compact.

The present application relates to fire resistant compositions, particularly fire resistant compositions comprising an inorganic filler. In particular, the disclosure relates to cladding compositions and composite panels comprising the fire resistant cladding compositions. The disclosure also relates to the preparation of such compositions, composite panels and to their use.

A multi-layer coating arrangement includes an environmental barrier coating (EBC) over a substrate; and at least one dense vertically cracked (DVC) coating layer over the EBC. The at least one DVC layer is resistant to erosion, water vapor corrosion and to calcium-magnesium-aluminum-silicate (CMAS).

Provided is a dielectric ceramic composition comprising a main component of forsterite and calcium strontium titanate. A content ratio of forsterite in the main component is from 84.0 to 92.5 parts by mole, and a content ratio of calcium strontium titanate is from 7.5 to 16.0 parts by mole. (Sr+Ca)/Ti in the calcium strontium titanate is from 1.03 to 1.20 in terms of a molar ratio. With respect to a total of 100 parts by mass of the main component and a subcomponent except for Li-containing glass, from 2 to 10 parts by mass of Li-containing glass is added. The Li-containing glass includes Al.sub.2O.sub.3 in an amount of from 1% by mass to 10% by mass.

Provided is a dielectric ceramic composition comprising a main component of forsterite and calcium strontium titanate. A content ratio of forsterite in the main component is from 84.0 to 92.5 parts by mole, and a content ratio of calcium strontium titanate is from 7.5 to 16.0 parts by mole. (Sr+Ca)/Ti in the calcium strontium titanate is from 1.03 to 1.20 in terms of a molar ratio. With respect to a total of 100 parts by mass of the main component and a subcomponent except for Li-containing glass, from 2 to 10 parts by mass of Li-containing glass is added. The Li-containing glass includes Al.sub.2O.sub.3 in an amount of from 1% by mass to 10% by mass.

LTCC devices are produced from dielectric compositions include a mixture of precursor materials that, upon firing, forms a dielectric material having a zinc-magnesium-manganese-silicon oxide host.