摘要:
Provided is a process for producing a glass-like carbon deformed molded article having a deformed section (typically, an elliptical section or a section composed of partial circles and linear portions), such as a glass-like carbon member in a deformed pipe form or a bent pipe, with relative ease and a good dimensional accuracy. The process comprises the step of molding a thermosetting resin to yield a thermosetting resin molded article, the step of deforming the thermosetting resin molded article plastically in the state that the article is heated, so as to yield a thermosetting resin deformed article, and the step of carbonizing the resultant thermosetting resin deformed article.
摘要:
Provided is a process for producing a glass-like carbon deformed molded article having a deformed section (typically, an elliptical section or a section composed of partial circles and linear portions), such as a glass-like carbon member in a deformed pipe form or a bent pipe, with relative ease and a good dimensional accuracy. The process comprises the step of molding a thermosetting resin to yield a thermosetting resin molded article, the step of deforming the thermosetting resin molded article plastically in the state that the article is heated, so as to yield a thermosetting resin deformed article, and the step of carbonizing the resultant thermosetting resin deformed article.
摘要:
A method for producing a glass-like carbon pipe is provided. The method comprises the steps of producing a plurality of thermosetting resin molded articles by centrifugal molding, said molded articles each having the shape of the sections of a pipe divided in the longitudinal direction and each provided with threaded or fitting portions; integrating these molded articles by joining at the threaded or fitting portions; and carbonizing the joined pipe to thereby produce a glass-like carbon pipe. This method is capable of producing a straight or bent pipe with excellent mechanical strength and gas sealability at the joint, and this method enables production of a pipe at a low cost since no machining is required for providing the threaded or fitting portions.
摘要:
A glass-like carbon induction heating element having high heating efficiency and a heating apparatus are provided. A glass-like carbon induction heating element, which inductively generates heat by electromagnetic induction, has an infrared radiation characteristic that a ratio (E1/E2) of infrared radiation intensity (E1) of an opposed face to an object-to-be-heated to infrared radiation intensity (E2) of a non-opposed face to the object-to-be-heated exceeds 1.2. A heating apparatus has the glass-like carbon induction heating element, and a high frequency induction coil that is disposed outside the glass-like carbon induction heating element for allowing the glass-like carbon induction heating element to inductively generate heat, wherein the high frequency induction coil is applied with a current so that the object-to-be-heated is heated by infrared rays radiated from the glass-like carbon induction heating element.
摘要:
A heating apparatus which is installed in a low pressure CVD system or annealing equipment for use in semiconductor integrated circuit manufacturing processes for heat-treating wafers on which IC's are to be formed, wherein wafers are uniformly heated, the temperature of wafers is rapidly raised and lowered, and wafers are processed in high volume, wherein the apparatus comprises a cylindrical body made of glass-like carbon placed inside a reactor, and a high-frequency induction coil which is placed outside the reactor and is for causing the cylindrical body made of glass-like carbon to produce heat and thereby heating wafers in the reactor.
摘要:
A two-phase glass-like carbon member has, in combination, a porous glass-like carbon base, and a dense glass-like carbon surface layer formed on the porous glass-like carbon base. The porous glass-like carbon base can be formed in a large thickness. The-dense glass-like carbon surface layer is superior to the porous glass-like carbon base in gas impermeability, surface hardness and resistance to dusting. The dense glass-like carbon surface layer supplements disadvantages of the porous glass-like carbon base. The two-phase glass-like carbon member can be in a large thickness exceeding 5 mm and in a complicated shape.
摘要:
A two-phase glass-like carbon member has, in combination, a porous glass-like carbon base, and a dense glass-like carbon surface layer formed on the porous glass-like carbon base. The porous glass-like carbon base can be formed in a large thickness. The dense glass-like carbon surface layer is superior to the porous glass-like carbon base in gas impermeability, surface hardness and resistance to dusting. The dense glass-like carbon surface layer supplements disadvantages of the porous glass-like carbon base. The two-phase glass-like carbon member can be in a large thickness exceeding 5 mm and in a complicated shape.
摘要:
A gravitational settling tank including a pressure vessel which precipitates solid content contained in slurry in which coal and solvent are blended, and separates the solid-content concentrated liquid from the supernatant liquid, and a supply pipe which supplies the pressure vessel with the slurry. A main body part and a nozzle part which is connected on the downstream side of the main body part and extends horizontally are provided in the supply pipe. A plurality of holes are provided in the nozzle part. By virtue of this, agitation of the solid-content concentrated liquid which has settled in the bottom is inhibited.
摘要:
A carbon substrate is prepared from a molded article of thermosetting resin by heat-treating in an inert atmosphere. The resin is characterized in that the content of Fe, Al, Ni, Co, Cr, and Mg insoluble in the resin is less than 1 ppm each and the content of Ca and Si insoluble in the resin is less than 2 ppm each. The thermosetting resin is further characterized in that the water content is less than 3 wt % and the ratio of the methylene carbon (CH.sub.2) connected to the hydroxyl group (OH) is less than 3% (based on the total carbon number). The carbon substrate prepared in this manner is almost free of defects and voids. It is suitable for use as the substrate of magnetic recording medium. The thermosetting resin may be a powdery or granular one which fluidizes and then cures on heating. A molded article of thermosetting resin is prepared by introducing the resin melt into a mold and curing it with heating under pressure. It is subsequently heat-treated in an inert atmosphere to give a molded article of glass-like carbon.
摘要:
A gravitational settling tank including a pressure vessel which precipitates solid content contained in slurry in which coal and solvent are blended, and separates the solid-content concentrated liquid from the supernatant liquid, and a supply pipe which supplies the pressure vessel with the slurry. A main body part and a nozzle part which is connected on the downstream side of the main body part and extends horizontally are provided in the supply pipe. A plurality of holes are provided in the nozzle part. By virtue of this, agitation of the solid-content concentrated liquid which has settled in the bottom is inhibited.