A ceramic electronic device includes a dielectric layer and an internal electrode layer that are alternately stacked, wherein the dielectric layer contains yttria-stabilized zirconia and (Ca.sub.x1Ba.sub.x2Sr.sub.1-x1-x2)(Ti.sub.yZr.sub.1-y)O.sub.3 (0.6≤x1≤0.9, 0≤x2≤0.1, 0≤y≤0.1) as a main component, and wherein, in the dielectric layer, a concentration of the yttria-stabilized zirconia when a total amount of Ti and Zr is 100 mol % is 0.5 mol % or more and 5.0 mol % or less.

A heat insulating material includes an aerogel that has macro-pores and meso-pores. A method for manufacturing a heat insulating material, including: a sol preparation step of adding a gelling agent into sodium silicate such that a molar ratio of the gelling agent relative to NaO.sub.2 is 0.1 to 0.75, and adjusting a sol into which macro-pores are introduced by leaving unreacted Na and non-cross-linked oxygen in a siloxane skeleton; an impregnating and gelling step of impregnating a nonwoven fabric fiber structure with the sol to form a composite of hydrogel-nonwoven fabric fiber; a hydrophobizating step of mixing the formed composite of hydrogel-nonwoven fabric fiber with a silylating agent to modify a surface thereof; and a drying step of removing a liquid contained in the surface modified composite of hydrogel-nonwoven fabric fiber by drying under a temperature and pressure lower than respective critical values.

One aspect of the present disclosure provides a composite body including: a nitride sintered body having a porous structure; and a semi-cured product of a thermosetting composition impregnated into the above-described nitride sintered body, in which dielectric breakdown voltage is 4.5 kV or higher.

A heat dissipation member includes a thermal radiation ceramic material, and the thermal radiation ceramic material contains silicon nitride and boron nitride as main components. The ratio of the mass of boron nitride to the mass of silicon nitride and boron nitride is 10 mass % to 40 mass %.

One aspect of the present invention provides a composite sheet which comprises a nitride sintered body having a porous structure and a semi-cured product of a thermosetting resin composition impregnated into the nitride sintered body, the line roughness Rz specified by JIS B 0601:2013 of at least one main surface being 10 μm or less.

A composite substrate includes, in this order: a ceramic plate; a metal layer containing at least one selected from the group consisting of aluminum and an aluminum alloy; and a thermal sprayed layer containing at least one selected from the group consisting of copper and a copper alloy, and an intermetallic compound containing copper and aluminum as constituent elements is scattered between the metal layer and the thermal sprayed layer.

A nanoporous carbon-loaded cement composite that conducts electricity. The nanoporous carbon-loaded cement composite can be used in a variety of different fields of use, including, for example, a structural super-capacitor as an energy solution for autonomous housing and other buildings, a heated cement for pavement deicing or house basement insulation against capillary rise, a protection of concrete against freeze-thaw (FT) or alkali silica reaction (ASR) or other crystallization degradation processes, and as a conductive cable, wire or concrete trace.

The present application relates to a polymer composition comprising from 20 wt % to 30 wt % of a polycarbonate; from 40 wt % to 60 wt % of a polybutylene terephthalate; from 5 wt % to 30 wt % of a reinforcement fiber; from 1 wt % to 10 wt % of glass bubbles, and from 0.3 wt % to 2 wt % of transesterification inhibitor, all contents are based on the total weight of the composition. The polymer composition according to the present invention has improved adhesion to the metal (especially aluminum), even after annealing and anodizing processes are applied.

A glassy carbon compact according to the present invention has a maximum inscribed sphere diameter of 5 mm or greater, comprises pores having diameters of 500 nm or less dispersed throughout the glassy carbon compact, and has a density of 1.1 g/cm.sup.3 or greater.

A nanoporous carbon-loaded cement composite that conducts electricity. The nanoporous carbon-loaded cement composite can be used in a variety of different fields of use, including, for example, a structural super-capacitor as an energy solution for autonomous housing and other buildings, a heated cement for pavement deicing or house basement insulation against capillary rise, a protection of concrete against freeze-thaw (FT) or alkali silica reaction (ASR) or other crystallization degradation processes, and as a conductive cable, wire or concrete trace.