A ceramic composite sintered body, including: a metal oxide as a main phase, and silicon carbide as a sub-phase, in which crystal grains of the silicon carbide are dispersed in crystal grains of the metal oxide and at crystal grain boundaries of the metal oxide, and an average crystal grain size of the silicon carbide dispersed at the crystal grain boundaries of the metal oxide is 0.30 μm or less.

A high zirconia electrically-fused cast refractory has a chemical composition including more than 95% by mass and 98% by mass or less of ZrO.sub.2, 0.1 to 1.5% by mass of Al.sub.2O.sub.3, 1 to 2.5% by mass of SiO.sub.2, 0 to 0.1% by mass of K.sub.2O, 0.01 to 0.3% by mass of Na.sub.2O and K.sub.2O in total, 0.02 to 0.4% by mass of B.sub.2O.sub.3, 0.01 to 0.6% by mass of BaO, 0.01 to 0.4% by mass of SnO.sub.2, 0.3% by mass or less of Fe.sub.2O.sub.3 and TiO.sub.2 in total, and 0.04% by mass or less of P.sub.2O.sub.5, wherein the contents of B.sub.2O.sub.3 and SnO.sub.2 satisfy the following Formulas (1) and (2):

0.20(SnO.sub.2/B.sub.2O.sub.3)<6.5(1)

0.14% by mass(C.sub.SnO2+C.sub.B2O3/2)0.55% by mass(2):

In Formula (2), C.sub.SnO2 represents the content of SnO.sub.2, and C.sub.B2O3 represents the content of B.sub.2O.sub.3, expressed in % by mass in the refractory.

A method of manufacture for a carbon/carbon part including a method to remove contamination from an intermediate product of the carbon/carbon part and furnace utilizing a gaseous reducing agent hydrogen gas to reduce the contaminates, thereby causing the contaminates to transition to a gaseous state at relatively lower temperatures. A method to remove contamination from an intermediate product of the carbon/carbon part and furnace utilizing hydrogen gas to reduce the contaminates, thereby causing the contaminates to transition to a gaseous state at relatively lower temperatures.

A method for making ceramic composites via sintering a mixture of alumina and oil fly ash. The alumina is in the form of nanoparticles and/or microparticles. The oil fly ash may be treated with an acid prior to the sintering. The composite may comprise graphite carbon derived from oil fly ash dispersed in an alumina matrix. The density, mechanical performance (e.g. Vickers hardness, fracture toughness), and thermal properties (e.g. thermal expansion, thermal conductivity) of the ceramic composites prepared by the method are also specified.

Provided are: an oxide sintered material including an In.sub.2O.sub.3 crystal phase, a Zn.sub.4In.sub.2O.sub.7 crystal phase and a ZnWO.sub.4 crystal phase, wherein the roundness of crystal particles composed of the ZnWO.sub.4 crystal phase is 0.01 or more and less than 0.7; a method for producing the oxide sintered material; and a method for manufacturing a semiconductor device including an oxide semiconductor film that is formed by using the oxide sintered material as a sputter target.

The invention relates to a copper-ceramic substrate comprising: a ceramic carrier, and at least one copper layer bonded to a surface of the ceramic carrier, which has a free surface for forming a conductor structure and/or for securing bonding wires, wherein the copper layer has a microstructure with an average grain size diameter of 200 to 500 m, preferably 300 to 400 m.

A SiC powder containing 70% by mass or more of a -SiC, wherein in a volume-based cumulative particle size distribution measured by a laser diffraction method, a D50 is 8 to 35 m and a D10 is 5 m or more.

A solid oxide fuel cell includes a cathode including a complex oxide having a perovskite structure expressed by the formula ABO.sub.3, an anode, and a solid electrolyte layer disposed between the cathode and the anode. The cathode includes phosphorus, chromium and boron, a content amount of the phosphorus in the cathode is at least 10 ppm and no more than 50 ppm, a content amount of the chromium in the cathode is at least 50 ppm and no more than 500 ppm, and a content amount of the boron in the cathode is at least 5 ppm and no more than 50 ppm.

A method comprises reacting an aluminum feedstock with an acid in the presence of water to provide an aluminum salt solution comprising an aluminum salt in water, wherein the aluminum salt comprises a reaction product of the acid and aluminum, and spray roasting the aluminum salt solution at a temperature of at least about 450 C. to provide an aluminum oxide powder, wherein the spray roasting is performed in a furnace lined with a refractory comprising alumina that is at least about 99.2% purity alumina, and wherein the aluminum oxide powder is 99.2% pure aluminum oxide or greater.

The present invention relates to the method of production of beta-tri-calcium phosphate (-TCP) with high purity and which has an osteoconductive support matrix which can be resorbed and which is bio-compliant when implanted to the defect area and which provides new bone formation in the defect area and which is resorbed while displacing with the newly formed bone in time.