A complex according to the present disclosure contains a β-eucryptite crystal phase and a lithium tantalate crystal phase. In a temperature range of 0 to 50° C., a coefficient of thermal expansion calculated for each 1° C. is within 0±1 ppm/K. Calcium is contained in the lithium tantalate crystal phase. The volume ratio of the β-eucryptite crystal phase to the lithium tantalate crystal phase is from 90:10 to 99.5:0.5.

A complex according to the present disclosure contains a β-eucryptite crystal phase and a lithium tantalate crystal phase. In a temperature range of 0 to 50° C., a coefficient of thermal expansion calculated for each 1° C. is within 0±1 ppm/K. Calcium is contained in the lithium tantalate crystal phase. The volume ratio of the β-eucryptite crystal phase to the lithium tantalate crystal phase is from 90:10 to 99.5:0.5.

An induction heating apparatus is disclosed. The disclosed induction heating apparatus includes: a cooking plate on which a cooking container is seated; and a plurality of induction heating coils installed below the cooking plate and configured to generate a magnetic field, wherein the cooking plate includes: a sintered ceramic plate material; and a reinforcement material layer disposed on a lower surface of the sintered ceramic plate material and provided by a fabric woven with an industrial fiber and a polyimide-based resin.

An induction heating apparatus is disclosed. The disclosed induction heating apparatus includes: a cooking plate on which a cooking container is seated; and a plurality of induction heating coils installed below the cooking plate and configured to generate a magnetic field, wherein the cooking plate includes: a sintered ceramic plate material; and a reinforcement material layer disposed on a lower surface of the sintered ceramic plate material and provided by a fabric woven with an industrial fiber and a polyimide-based resin.

A ceramic heating resistor to be arranged in a tubular element of an electrical heating element for heating a fluid, preferably air, wherein the heating resistor can be produced by sintering a green body comprising at least one ceramic raw material. The heating resistor includes an electrically insulating component and an electrically conducting component, and the electrically insulating component forms a matrix in which the electrically conducting component is accommodated. An electrical heating element for heating a fluid, preferably air, including at least one tubular element, through which a fluid flows or can flow, and to a device for heating a fluid, preferably air, including at least one such heating element.

A ceramic heating resistor to be arranged in a tubular element of an electrical heating element for heating a fluid, preferably air, wherein the heating resistor can be produced by sintering a green body comprising at least one ceramic raw material. The heating resistor includes an electrically insulating component and an electrically conducting component, and the electrically insulating component forms a matrix in which the electrically conducting component is accommodated. An electrical heating element for heating a fluid, preferably air, comprising including at least one tubular element, through which a fluid flows or can flow, and to a device for heating a fluid, preferably air, including at least one such heating element.

A ceramic deep-frying device capable of withstanding high temperatures and releasing far-infrared energy is made by grinding and mixing mullite, spodumene, energy ceramic material, ball clay, and kaolin clay into clay blank; molding the blank into ceramic green body; and sintering the green body at 1250-1320° C. for 18-24 hours. The device is completely immersed in the oil in a deep-frying vessel while leaving a gap between the device and heating pipe in the vessel or the inner bottom wall of the vessel, for enabling the oil to circulate through the through holes in the device due to temperature difference in the oil, causing the energy ceramic material to release anions and far-infrared rays that decrease van der Waals forces between oil molecules, and hence split, the oil molecules, thereby extending the service life of the oil, shortening the deep-frying time required, and lowering the oil content of deep-fried food.

The present invention is a composition and shaping of a ceramic material comprising at least one frit and at least one inorganic raw material. Some of the advantages are that said material requires a heat treatment no higher than 1180° C., that the duration of said heat treatment does not exceed 60 minutes, that the thermal expansion coefficient after the heat treatment is less than 25×10.sup.−7° C..sup.−1 in the temperature range 25° C. to 500° C. and that the material exhibits a high resistance to thermal shock, withstanding at least 10 consecutive thermal shock cycles between 600° C. and 25° C. without forming cracks or structural changes. The ceramic material composition is shaped by uniaxial pressing, band pressing, pour moulding, extrusion, injection moulding or lamination.

The present invention is a composition and shaping of a ceramic material comprising at least one frit and at least one inorganic raw material. Some of the advantages are that said material requires a heat treatment no higher than 1180° C., that the duration of said heat treatment does not exceed 60 minutes, that the thermal expansion coefficient after the heat treatment is less than 25×10.sup.−7° C..sup.−1 in the temperature range 25° C. to 500° C. and that the material exhibits a high resistance to thermal shock, withstanding at least 10 consecutive thermal shock cycles between 600° C. and 25° C. without forming cracks or structural changes. The ceramic material composition is shaped by uniaxial pressing, band pressing, pour moulding, extrusion, injection moulding or lamination.

A process for producing an interior trim part (1) with a decorative layer situated on a first side (S1) thereof and forming a decorative pattern (M) for the interior of a motor vehicle, the process comprising the following steps: (a) formation of at least one cutout configuration (R), defined by a predetermined decorative pattern (M), in a protective layer (120) situated on a first side (S1), which is situated on a first surface (110a) of the shell-shaped base body (110) made of a metallic material, (b) deposition of sinterable decorative material on the first side (S1) in such a way that the decorative material, as an intermediate layer (150), covers at least the area in which the cutout configuration (R) defined by the decorative pattern (M) is formed in the protective layer (120), (c) laser-sintering of the intermediate layer (150) inside the at least one cutout configuration defined by the decorative pattern (M), (d) removal of the sinterable decorative material that is situated outside the at least one cutout configuration defined by the decorative pattern (M),
as well as an interior trim part (1).