摘要:
A graphite-particles-dispersed composite produced by compacting graphite particles coated with a high-thermal-conductivity metal such as silver, copper and aluminum, the graphite particles having an average particle size of 20-500 μm, the volume ratio of the graphite particles to the metal being 60/40-95/5, and the composite having thermal conductivity of 150 W/mK or more in at least one direction.
摘要:
A composite material having a high thermal conductivity and a small thermal expansion coefficient, which is obtained by impregnating a porous graphitized extrudate with a metal; the composite material having such anisotropy that the thermal conductivity and the thermal expansion coefficient are 250 W/mK a more and less than 4×10−6/K, respectively, in an extrusion direction; and that the thermal conductivity and the thermal expansion coefficient are 150 W/mK or more and 10×10−6/K or less, respectively, in a direction perpendicular to the extrusion direction.
摘要:
An oxide semiconductor target of a ZTO (zinc tin complex oxide) type oxide semiconductor material of an appropriate (Zn/(Zn+Sn)) composition having high mobility and threshold potential stability and with less restriction in view of the cost and the resource and with less restriction in view of the process, and an oxide semiconductor device using the same, in which a sintered Zn tin complex oxide with a (Zn/(Zn+Sn)) composition of 0.6 to 0.8 is used as a target, the resistivity of the target itself is at a high resistance of 1 Ωcm or higher and, further, the total concentration of impurities is controlled to 100 ppm or less.
摘要:
A graphite-particles-dispersed composite produced by compacting graphite particles coated with a high-thermal-conductivity metal such as silver, copper and aluminum, the graphite particles having an average particle size of 20-500 μm, the volume ratio of the graphite particles to the metal being 60/40-95/5, and the composite having thermal conductivity of 150 W/mK or more in at least one direction.
摘要:
A multilayered electronic part with minimized silver diffusion into ceramic body. The multilayered electronic part is produced by sintering a green ceramic body of a plurality of ceramic layers comprising a main phase and a grain boundary phase, at least one of the ceramic layers being printed thereon Ag-containing internal electrode patterns which may serve as markers for indicating several information such as a production number, a name of manufacturer, a kind of circuit, etc. By the production method of the invention, the diffusion of Ag in the internal electrode patterns into the ceramic body is effectively prevented to avoid the deterioration of the electrical characteristics as well as to avoid the blackening of the ceramic to ensure a high lightness of the ceramic body which enhances the reliability of the visual identification and distinguishability of the markers.
摘要:
A ceramic core is obtained by firing a mixture that contains 0.1-15.0% by mass of alumina and 0.005-0.1% by mass of potassium and/or sodium with the balance made up of silica and unavoidable impurities. Not less than 90% by mass of amorphous silica is contained in 100% by mass of the silica. A method for producing a ceramic core, wherein: a blended material is obtained by blending 25-45% by volume of a binder into 55-75% by volume of a mixture that is obtained by mixing alumina, potassium and/or sodium, and silica so as to have the above-mentioned composition; the blended material is injected into a die so as to obtain a molded body; and the molded body is degreased at 500-600° C. for 1-10 hours, and then fired at 1,200-1,400° C. for 1-10 hours.
摘要:
A ceramic core is obtained by firing a mixture that contains 0.1-15.0% by mass of alumina and 0.005-0.1% by mass of potassium and/or sodium with the balance made up of silica and unavoidable impurities. Not less than 90% by mass of amorphous silica is contained in 100% by mass of the silica. A method for producing a ceramic core, wherein: a blended material is obtained by blending 25-45% by volume of a binder into 55-75% by volume of a mixture that is obtained by mixing alumina, potassium and/or sodium, and silica so as to have the above-mentioned composition; the blended material is injected into a die so as to obtain a molded body; and the molded body is degreased at 500-600° C. for 1-10 hours, and then fired at 1,200-1,400° C. for 1-10 hours.
摘要:
A composite material having a high thermal conductivity and a small thermal expansion coefficient, which is obtained by impregnating a porous graphitized extrudate with a metal; the composite material having such anisotropy that the thermal conductivity and the thermal expansion coefficient are 250 W/mK a more and less than 4×10−6/K, respectively, in an extrusion direction; and that the thermal conductivity and the thermal expansion coefficient are 150 W/mK or more and 10×10−6/K or less, respectively, in a direction perpendicular to the extrusion direction.
摘要:
A sintered ceramic composite comprising 35 to 80 wt. % of aluminum nitride, 2 to 60 wt. % of boron nitride, 0.1 to 25 wt. % of an oxide of magnesium, 0.5 to 20 wt. % of at least one of rare earth oxides including yttrium oxide as an optional component and 25 wt. % or less of aluminum oxide as an optional component is disclosed.
摘要:
A diffusion-bonded assembly of AlN ceramic bodies, at least one of the AlN ceramic bodies having a boundary phase content of 1000 ppm or more. A heat dissipation member constituted by diffusion-bonded AlN ceramic bodies, at least one of the AlN ceramic bodies having a boundary phase content of 1000 ppm or more.