Abstract:
PROBLEM TO BE SOLVED: To provide a method where, when the sintered compact of inorganic powder is produced by a joining process, firm joining is attained without using slurry for joining. SOLUTION: A first inorganic powder molding and a second inorganic powder molding comprising inorganic powder, an organic dispersion medium having a reactive functional group and a gelling agent, and solidified by chemical reaction between the organic dispersion medium and the gelling agent are obtained. In a state where the joining face of the first inorganic power molding and the joining face of the second inorganic powder molding are brought into contact, they are joined under load, so as to obtain an integrated joined body. Next, the joined body is sintered, so as to obtain a sintered compact. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PURPOSE: To mold and manufacture in a good manner a very fine ceramic bar-shaped body of non-uniform wall thickness provided with hollow sections inside by preparing ceramic raw material powder, forming granular particles having the average particle diameter and apparent bulk density of specified range, injection molding a molding material composed of the granular particles blended with a binder, and degreasing and burning the material. CONSTITUTION: When a very fine bar-shaped ceramic body 2 with a hollow section 1 used suitably for a medical laser surgical knife, a laser probe and the like, ceramic raw material powder is prepared to form granular particles of average particle diameter of 50-90μm and apparent bulk density of 0.60-0.80g/cm , and a molding material composed of granular particles blended with a binder is injection molded by the molding pressure of 500kg/cm or lower, and then degreased and burnt. The granular particles are formed into the round shape, by which the internal friction of the ceramic material is reduced, and the molding material is filled stably into a thin wall section even when the shape of the body is very fine and its wall thickness is of non-uniform shape.
Abstract:
PROBLEM TO BE SOLVED: To provide a translucent wiring board including a translucent alumina substrate and a wiring pattern formed on a surface of the translucent alumina substrate, in which adhesion between the wiring pattern and the translucent alumina substrate is maintained after the application of heat cycles, and translucency of the wiring board can be obtained.SOLUTION: A translucent wiring board 8 includes a translucent alumina substrate 1 and a wiring pattern 2 formed on a surface 1a of the translucent alumina substrate 1. A smooth surface 5 and a rough surface 6 are formed on the surface 1a of the translucent alumina substrate 1, and the wiring pattern 2 is formed on the rough surface 6 but not formed on the smooth surface 5.
Abstract:
PROBLEM TO BE SOLVED: To provide a light-emitting container having uneven thickness as a whole in a manner that at least the central region in a trunk part is thinner than a terminal part and a boundary region between the terminal part and the trunk part, and to provide a high pressure discharge lamp having the light-emitting container. SOLUTION: The trunk part forming a discharge space and the terminal parts 2a, 2b into which, electrode members are inserted are formed integrally by a translucent ceramic material, and the central region 1 in the trunk part is made thinner l1 in thickness than the terminal part l2, and the inner diameter of the terminal part is about 2 mm or less. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To prevent generation of crack without an employment of accurate control of a sealing frit or method such as thickness increasing of capillary tube. SOLUTION: With respect to a trunk part 2 having a light emission space, a capillary tube 3 is formed by adding magnesium oxide of about twenty times and by calcining it at 1,200 deg.C, and is connected at the separatedly made trunk part 2. Thereafter, they are calcined at 1,200 deg.C and then is burned at 1,850 deg.C in hydrogen atmosphere for 3 hour, so that the average particle diameter of alumina in the trunk part 2, is 32 μm and that of the capillary tube 3 is 19 μm to increase the strength.
Abstract:
PROBLEM TO BE SOLVED: To provide a translucent wiring substrate, comprising a translucent alumina substrate and a wiring pattern formed on a surface of the translucent alumina substrate, and capable of retaining adhesion of the wiring pattern to the translucent alumina substrate after applying heat cycle, and acquiring translucency of the wiring board.SOLUTION: A wiring board 8 comprises: a base layer 7 formed on a surface 1a of a translucent alumina substrate 1; and a wiring pattern 2 formed on the base layer 7. A smooth surface is exposed in an area 5 which is not coated by the wiring pattern 2 on the surface 1a of the translucent alumina substrate 1. The base layer 7 is composed of: cermet containing 5 to 60 vol.% of one or more kinds of metals selected from a group composed of molybdenum and tungsten and 95 to 40 vol.% of alumina; or alumina containing 50 to 200 ppm of silica.
Abstract:
PROBLEM TO BE SOLVED: To provide a ceramic tube for a high-intensity discharge lamp preventing tilting of a plug member to an insertion hole formed in a hollow member to face an electrode inserting part coaxially. SOLUTION: An insertion hole 24 including a tapered diameter-reduced portion 36 tapered and reducing the diameter inward from an inlet for insertion of a plug member 26 is formed in a body 28 of a calcinated hollow member 22. The plug member 26 has a disk shaped part 46 having a diameter smaller than that of the inlet. When the disk shaped part 46 is inserted into the insertion hole 24 from the inlet and integrated by firing, bonding of the side wall of the disk shaped part starts at the inner wall of the smallest-diameter portion of the insertion hole 24. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a light emitting vessel for a high pressure discharge lamp for reducing a light color change in the high pressure discharge lamp using the light emitting vessel by integrally molding an electrode inserting part and at least an end part of a body part, and capable of lengthening the service life. SOLUTION: The almost elliptic body part 1 for forming a discharge space, and a capillary part 2 for inserting and fixing a discharge electrode projected outward so as to be mutually opposed from both ends of the body part 1 are integrally molded, and are formed by sintering so as to have light transmissivity by using alumina as a main component, and a boundary end part 3 between the body part 1 being a discharge space corner part and the capillary part 2 is formed by imparting a radius of curvature R of 1.0 mm.
Abstract:
PROBLEM TO BE SOLVED: To provide a light emitting vessel for a high pressure discharge lamp which can prolong the life of the lamp even if the light emitting space of discharge is cylinder-shaped. SOLUTION: The light emitting vessel is composed of a cylinder-shaped trunk part 1 forming a light emitting space of discharge, ring-shaped sealing parts 2, 2 sealing both ends of the trunk part 1 respectively, and capillary parts 3, 3 extruding outsides from almost center part of the sealing part so as to face each other in opposite direction, and fixing an inserted discharge electrodes, which are formed so as to have transparency by using alumina as a main component, and inner surface of the trunk part at a boundary part 4 of the trunk part 1 and the sealing part 2 is formed so as to have R with a diameter of 1.0 mm to make the thickness change gradually.