公开(公告)号：JPH0450175A

公开(公告)日：1992-02-19

申请号：JP15890490

申请日：1990-06-18

Applicant: SUMITOMO METAL MINING CO

Inventor： OSHIMA YASUO

IPC: C04B35/653

Abstract: PURPOSE:To improve the yield by specifying the ambient temperature and the cooling rate during coagulation process in casting of the subject slag tile. CONSTITUTION:A slag produced in a copper scouring process is charged in a molding for production of a slag tile in a molten state and cooled at

公开(公告)号：JPH0418623U

公开(公告)日：1992-02-17

申请号：JP5702790

申请日：1990-05-30

IPC: A61C13/20 ,  C03B19/02 ,  C04B35/653 ,  C04B35/60

公开(公告)号：JPH0444303A

公开(公告)日：1992-02-14

申请号：JP15244690

申请日：1990-06-11

Applicant: DAIDO STEEL CO LTD

Inventor： SUGIMOTO MITSUO ,  SAITO AKIHIKO

IPC: C01G49/00 ,  C04B35/26 ,  C04B35/653 ,  H01F1/34

Abstract: PURPOSE:To obtain a product with a uniform ferrite composition and an extremely less scattering of magnetic characteristics easily by controlling Zn content when producing MxZn1-xO.Fe2O3 type soft-magnetic ferrite by casting. CONSTITUTION:When producing a soft-magnetic ferrite which is expressed by a general expression MxZn1-xO.Fe2O3 (M is one or more types of metals which are selected from Cu, Mn, Ni, Fe, Co, and Mg) by dissolution casting, a material which is selected from the above expression or a material which consists of an oxide mixture which is equivalent to this composition are heated, a Zn supply source which contains Zn or a Zn compound is placed around the soft-magnetic ferrite material at that time to allow a Zn constituent within a dissolution atmosphere, gas which does not give bad influence to the material is used for the dissolution atmosphere, this gas is maintained to be in pressurized state, dissolution is performed while restricting scattering of evaporation of Zn constituent within a material, and a melted object is coagulated. The Zn partial pressure of the atmosphere may be equal to the pressure which is suffi cient for resisting against Zn partial pressure which is produced since Zn is evaporated from a ferrite material when the Zn supply source is not placed.

公开(公告)号：JPH049250A

公开(公告)日：1992-01-14

申请号：JP11353790

申请日：1990-04-27

Applicant: CENTRAL GLASS CO LTD

Inventor： ARAYA SHINICHI

IPC: B22D11/01 ,  B22D11/10 ,  C04B35/653 ,  C22C1/00 ,  C22C1/02 ,  C22C45/02 ,  C22C45/04

Abstract: PURPOSE:To efficiently and stably enable rapid cooling of an inorganic material and to easily obtain amorphous material by drawing out molten fine flow of metallic or ceramic inorganic material with one pair of rolls, specifying air pressure to this and discharging the air from an air nozzle end. CONSTITUTION:The air introduced from a compressor is stored in a high pressure air chamber 7. This air pressure is made to >=5kg/cm for developing high velocity gas flow 6 needed to effectively make the inorganic material amorphous. The air from the high pressure air chamber 7 develops the fast gas flow with opening of a valve 9 and rapidly expands from the air pipe 10 to intermediate air chamber 11 and further, in the nozzle parts 5, 5', as wave motion having sound velocity or higher than this, i.e., shocking wave 6 with the prescribed discharging pressure, the air is discharged against the inorganic material and this is rapidly cooled and made to the amorphous material.

公开(公告)号：JPH03275568A

公开(公告)日：1991-12-06

申请号：JP7726990

申请日：1990-03-27

Applicant: OSAKA CITY ,  JGC CORP

Inventor： MIYAHARA FUMIAKI ,  IKEDA SHIRO ,  KATO TETSUO

IPC: B09B3/00 ,  C04B33/13 ,  C04B33/135 ,  C04B35/653 ,  C04B35/74

Abstract: PURPOSE:To effectively utilize molten ash having low utility value as a building material by pouring the molten ash produced in a furnace for melting sludge and/or ash produced by incineration into a specified mold with a set metallic reinforcing material and solidifying the molten ash by cooling. CONSTITUTION:A metallic reinforcing material such as a steel deformed bar, net or lattice is set in a mold having a desired block shape and molten ash produced in a furnace for melting sludge and/or ash produced by incineration is poured into the mold preferably at a temp. above the pour point by >=100 deg.C so as to enclose the reinforcing material. The molten ash is solidified by cooling and the resulting block is taken out of the mold.

公开(公告)号：JPH03261619A

公开(公告)日：1991-11-21

申请号：JP31631389

申请日：1989-12-05

Applicant: SUMITOMO ELECTRIC INDUSTRIES

Inventor： TORII YASUKO ,  OKURA KENGO ,  KOTANI TOSHIHIRO

IPC: C04B35/00 ,  C01G1/00 ,  C01G15/00 ,  C01G29/00 ,  C04B35/45 ,  C04B35/653 ,  H01B12/04 ,  H01B13/00 ,  H01F1/00 ,  H01L39/12 ,  H01L39/24

Abstract: PURPOSE:To obtain an oxide superconducting material having high critical current density even under high magnetic field by melting an oxide raw material containing Tl, Bi, Sr, Ca and Cu at a specific ratio and then gradually cooling the melted raw material at a prescribed cooling speed. CONSTITUTION:When a superconducting oxide single crystal containing Tl, Bi, Sr, Ca and Cu is produced, an oxide raw material containing Tl, Bi, Sr, Ca and Cu at a ratio of (Tl+Bi):Sr:Ca:Cu of 2:2:(n-n):n (Tl/Bi>1, n is 3-7) is melted at 950-1050 deg.C and then gradually cooled at a cooling rate of 1-20 deg.C/hr. The above-mentioned material is an oxide superconducting material containing a compound oxide of a composition expressed by the formula. In the composition expressed by the formula, A is at least one kind of element among In, Sn, Sb, Pb, Y and lanthanoid elements; x, y, z, p, q, v and w represent ratio of each element and are numbers satisfying these formulas: 0

公开(公告)号：JPH03252369A

公开(公告)日：1991-11-11

申请号：JP5152190

申请日：1990-03-02

Applicant: SHOWA DENKO KK

Inventor： OTOMO AKIRA ,  FUKIZAWA AKIRA

IPC: C04B35/653

Abstract: PURPOSE:To obtain an oxide superconductor excellent in critical current density, toughness, etc., by heating and fusing a Bi-based oxide superconductor, adding a metal selected from Cu, Ag and Au thereto, melting the prepared mixture, then quenching the melt to the glass transition temperature or below and keeping the quenched mixture at a temperature for forming a superconducting phase. CONSTITUTION:An oxide composed of Bi-Pb-Sr-Ca-Cu-O or Bi-Sr-Ca-Cu-O is melted by heating to the melting temperature thereof or above. (A) At least one or more metals (hereinafter abbreviated to coin metal) selected from Cu, Ag and Au are added to the molten oxide and both are melted or (B) a melt of the coin metal is brought into contact therewith. Alternatively, (C) a solid coin metal heated to >=500 deg.C is brought into contact therewith. The obtained mixture is then quenched to the glass transition temperature or below of the oxide and subsequently kept at a temperature for forming a superconducting phase for a prescribed time to afford an oxide superconductor.

公开(公告)号：JPH03222214A

公开(公告)日：1991-10-01

申请号：JP1702190

申请日：1990-01-27

Applicant: SUMITOMO ELECTRIC INDUSTRIES

Inventor： NONOYAMA HISAO ,  HAYASHI KAZUHIKO

IPC: C04B35/653 ,  B28B1/00 ,  C01G1/00 ,  C01G29/00 ,  H01B12/04 ,  H01B13/00

Abstract: PURPOSE:To obtain a ceramic base superconductive wire-rod of high critical current density and of excellent crystal-orienting property by applying plural alternate repetitions of a diameter-reducing process and a unidirectional solidifying process to a ceramic material coated with a metal sheath and then heat- treating the material. CONSTITUTION:A superconductive wire-rod 1 obtained by coating a ceramic material having its superconductivity or its precursory ceramic material with a metal sheath is moved while being taken out from a feed reel 2 and wound round a take-up reel 3. An infrared ray-converging heating-furnace 5 is arranged in the middle of this moving route. After plural alternate repetitions of a diameter-reducing process and a unidirectional solidifying process are then applied to the wire-rod, heat treatment is given to the wire-rod. Processing at this time is carried out preferably at a temperature of not less than 800 degrees centigrade and of less than the melting point of the ceramic material. Thus, a superconductive wire-rod can be obtained with its further excellent crystal-orienting property and its high critical current density.

公开(公告)号：JPH03199158A

公开(公告)日：1991-08-30

申请号：JP34245789

申请日：1989-12-28

Applicant: NGK INSULATORS LTD

Inventor： SAKAI HITOSHI ,  YOSHIDA MANABU ,  YOSHIDA HITOSHI

IPC: C04B35/00 ,  C01G1/00 ,  C01G29/00 ,  C04B35/45 ,  C04B35/628 ,  C04B35/653 ,  H01B12/00 ,  H01B13/00

Abstract: PURPOSE:To easily obtain a bismuth-based superconductor having high critical current temp. by partially melting a molded body and thereafter slowly cooling the molded body to the crystallization temp. and then crystallizing it in the production of the bismuth-based superconductor via partial melting. CONSTITUTION:The raw materials (e.g. Bi2O3, SrCO3, CaCO3 and CuO) necessary to produce a bismuth-based superconductor are mixed at the prescribed ratio. The mixture is calcined, ground and molded. Then the obtained molded body is heated and partially melted. Thereafter it is slowly cooled to the crystallization temp. and particle growth of a superconductive phase is sufficiently caused by the reaction of both a solid phase component and a liquid phase component. The cooling velocity at the time of slow cooling is ordinarily and properly regulated to about 0.1-2 deg.C/minute. Then the bismuth-based superconductor (e.g. Bi-Sr-Oa-Cu-Obased superconductor) having extremely high critical current temp. is obtained by holding the molded body at the crystallization temp. to crystallize it.

公开(公告)号：JPH03153558A

公开(公告)日：1991-07-01

申请号：JP29175189

申请日：1989-11-08

Applicant: KOKUSAI CHODENDO SANGYO GIJUTS ,  NIPPON STEEL CORP ,  RAILWAY TECHNICAL RES INST ,  SHIKOKU ELEC POWER

Inventor： MURAKAMI MASAHITO ,  FUJIMOTO HIROYUKI ,  KOSHIZUKA NAOKI ,  KOYAMA HISAJI ,  SHIOBARA TORU ,  TANAKA SHOJI

IPC: C04B35/00 ,  C01G1/00 ,  C01G3/00 ,  C04B35/45 ,  C04B35/645 ,  C04B35/653 ,  H01B12/00 ,  H01B12/04 ,  H01B13/00 ,  H01F6/06 ,  H01L39/24

Abstract: PURPOSE:To obtain the superconductor consisting of a polycrystalline substance having a high Tc and a good orientational property by heating the raw powder for a YBaCuO-based oxide superconductor to high temp., then cooling, crushing, sufficiently agitating and mixing the powder, packing the mixture into a flexible tube and applying isobaric treatment and superconducting phase growth treatment. CONSTITUTION:The raw powder for forming an REBaCUO-based oxide superconductor (RE is rare-earth elements including Y) or the material formed by the conventional sintering method is heated to high temp. The material is then cooled and crushed, and the crushed material is sufficiently agitated and mixed until the RE2O3 phase or RE2BaCuO3 phase is finely and uniformly dispersed in a liq. phase. The mixed and crushed material is packed into a flexible tube 20 (e.g. rubber tube), and both ends are fixed to a disk 12 to exert a tension in the longitudinal direction. The material is then packed in the hydraulic cylinder 31 of a CIP device, and isobaric treatment is applied. The obtained superconducting raw rod 24 is brought out, a superconducting phase is grown by the unidirectional solidification method, etc., and the oxide superconductor is obtained.