Abstract: This disclosure relates to a formed body having activated carbon granules bondedly carried by an inorganic substance body consisting of a sintered body or fused body of inorganic substance powder. The formed body preferably is of a honeycombed structure. The formed body is not only high in strength, excellent in absorbing ability, long in service life, but also permits of molding into various shapes fit for uses. The invention also relates to a method of producing the formed body of the type described above. The method essentially follows the conventional ceramic firing art or ceramic production art.

Abstract: A method of producing a dense sintered silicon carbide body, which is high in flexural strength, purity and strength at an elevated temperature, from polycarbosilanes is disclosed. This method comprises the following steps of:A. polymerizing organosilicon compounds to obtain insoluble and unmeltable polycarbosilane of which the melting or softening temperature lies higher than its thermal decomposition temperature;B. grinding this insoluble and unmeltable polycarbosilane to powder;C. decomposing this powder thermally in the range of 600.degree. to 2200.degree. C. in a nonoxidizing atmosphere to obtain silicon carbide;D. molding this silicon carbide powder; andE. sintering the thus molded body in a nonoxidizing atmosphere.

Abstract: A supporting member of the papermaking screen in paper machines is disclosed, which is made with a sintered body consisting essentially of silicon nitride, having a porosity of less than about 0.8% whereby the abrasion loss rate of the papermaking screen is able to be remarkably reduced as compared with the conventional supporting members made of alumina ceramic, as a result of which the useful life of the papermaking screen can be lengthened greatly.

Abstract: This disclosure relates to a ceramic heater excellent in thermal shock resistance, high temperature resisting property, and free from change in resistance value even in the repeated use of the heater at high temperatures. The heater comprises a heat resisting element of high melting-point metal embedded in a ceramic body of nonoxide selected from a group consisting of silicon nitride, sialon, aluminium nitride and silicon carbide.

Abstract: A ceramic substrate having a convex portion formed singly or plurally on the end faces of the circumference of the substrate so as to bring the convex portions into collision with each other prior to direct collision of the substrates with each other for the purpose of effectively preventing damage due to eventual collision of the end faces of the substrates with each other or corner portions during transfer to an assembling station by an automatic feeding means such as a sloping tray.

Abstract: This invention discloses a crack-free and low-cost detection element for determining an oxygen content and a detector for determining an oxygen content using the element. The element comprises a ceramic tubular body, an ion-conductive ceramic bowllike closing member fixed to the opening end of the tubular body in such manner that the opening end of the closing member may not be inserted into the opening of the tubular body, and an inner and an outer electrode respectively mounted on the inside and the outside surface of the bowllike closing member.

Abstract: A silicon-semiconductor type thermal head comprising a substrate of .alpha.-alumina ceramic of single crystalline sapphire a silicon layer of high electrical resistance formed on the upper surface of the substrate and exothermic dots of low electrical resistance silicon integrally formed on the high resistance silicon layer.The silicon semiconductor type thermal head is formed by forming a substrate of .alpha.-alumina ceramic of single crystalline and sapphire, forming a high resistance layer of silicon on the .alpha.-alumina ceramic, forming a layer of low resistance silicon on the high resistance layer of silicon and selectively etching the low and high resistance silicon layers to produce exothermic dots of low resistance silicon, separated from the substrate by high resistance silicon.

Abstract: This disclosure relates to a somatic element of single crystalline sapphire ceramics for use as an implant for dental surgery, orthopedic prosthetic surgery and the like, which element is excellent in mechanical strength, flexibility and affinity with its ambient tissue so much so that it eliminates a fear of development of bone cancer and facilitates the proliferation of uniform bone tissue around the somatic element implanted.

Abstract: A method of producing a sintered silicon carbide body high in density, flexural strength and purity at elevated temperatures from polycarbosilanes is disclosed. The method involves the following steps:(A) polymerizing organosilicon compounds to yield specific polycarbosilanes which are insoluble in solvents and unmeltable i.e. the polycarbosilanes being higher in melting temperature or in softening temperature than in thermal decomposition temperature;(B) pulverizing the insoluble and unmeltable polycarbosilanes so as to form a powder;(C) applying heat with or without the use of pressure to the powder charged into a hot press mold in a nonoxidizing atmosphere to thereby decompose the same thermally into silicon carbide and sintering the silicon carbide under pressure.

Abstract: This invention is directed to a device for implanting an artificial endosseous element of ceramics in the field of dentistry, oral surgery and orthopedics, comprising an implant screw pin and a flange member or flange members. The present invention provides an implant element which is adapted for uses of prosthesis even in cases where a hole remains after extraction of a tooth or the bone tissues are unhealthy, and presents an implant pin which is adapted to be securely held by means of the flange member to the tissue of the jaw bone. This invention is also directed to an implant method for use of such device.