中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

8 records (took 0.024 seconds)

    METHOD FOR MEASURING PLASTICITY OF KNEADED EARTH
    1.
    发明专利
    METHOD FOR MEASURING PLASTICITY OF KNEADED EARTH 失效

    公开(公告)号：JPH1194725A

    公开(公告)日：1999-04-09

    申请号：JP26817797

    申请日：1997-09-12

    Applicant: AGENCY IND SCIENCE TECHN ,  CERAMICS SUIKA SOSEIKEI GIJUTS

    Inventor： SHIBAZAKI YASUO ,  ODA KIICHI ,  SANO SABURO ,  TOMONO TAKUMI ,  OGURI KENTA ,  KAWAI HIDEJI ,  NOMURA YUJI ,  ONO AKIRA

    IPC: G01N11/00 ,  G01N11/04 ,  G01N11/08 ,  G01N33/24

    Abstract: PROBLEM TO BE SOLVED: To correctly measure plasticity of kneaded earth by adding pressure by a piston to the elastic body stored in a cylinder chamber, extruding the kneaded earth through a capillary, and obtaining a shear stress and a shear velocity from an extrusion pressure at the time, etc. SOLUTION: A kneaded earth 18 as a sample is pressed into a cylinder chamber 10. A piston 16 is pressed to extrude the kneaded earth 18 from a capillary 14. An extrusion pressure is measured by a pressure sensor 20. A shear stress and a shear velocity are obtained from the measured extrusion pressure, an extrusion speed and a size of the capillary 14. At this time, a pressure loss of the extrusion pressure applied by the piston 16 into the capillary 14 through the cylinder chamber 10 is corrected with a length of the capillary, so that a true shear stress is obtained. The true shear stress is obtained under various shear velocities, and a relationship of the shear velocity and shear stress is induced. A fluidity and a shape retention of the plastic body 18 are obtained from the relationship of the shear velocity and shear stress, and whether the kneaded earth has good plasticity or not is judged.

    CONTROL OF PLASTICITY OF KNEADED CLAY
    2.
    发明专利
    CONTROL OF PLASTICITY OF KNEADED CLAY 失效

    公开(公告)号：JP2000169237A

    公开(公告)日：2000-06-20

    申请号：JP34913198

    申请日：1998-12-08

    Applicant: AGENCY IND SCIENCE TECHN ,  INAX CORP ,  TOYO DENKA KOGYO CO LTD ,  NIKKO KK ,  YKK CORP

    Inventor： SHIBAZAKI YASUO ,  ODA KIICHI ,  SANO SABURO ,  TOMONO TAKUMI ,  OGURI KENTA ,  KAWAI HIDEJI ,  NOMURA YUJI ,  ONO AKIRA

    IPC: C04B33/13 ,  B28B3/20 ,  B28C1/16 ,  C04B35/622

    Abstract: PROBLEM TO BE SOLVED: To control the plasticity of a kneaded clay so that the extrusion molding can be carried out excellently by adding a buffer material having deformability having a stress showing a specific value when a prescribed deformation is caused to an original shape, as an additive to a kneaded clay comprising nonplastic particles. SOLUTION: A buffer material having deformability with 0.002-0.7 MPa stress when the original shape is deformed by 40%, is added to a kneaded clay, especially preferably to the kneaded clay comprising nonplastic particles such as alumina as an additive for imparting the plasticity to control the plasticity of the kneaded clay. The size of the buffer material is preferably 10-1,000 μm, and the buffer material having high water absorption such as the one having water-absorbing magnification of 5-500 times is preferably used. The proportion of the added buffer material is preferably 0.05-10 wt.% based on the amount (100 wt.%) of the particles of the kneaded clay. The buffer material is thought that when an external force is applied to the kneaded clay, the plasticity is heightened because the buffer material itself is deformed and assists the movement of the particles of the kneaded clay to heighten the fluidity of the clay.

    PRODUCTION OF TRANSLUCENT ALUMINA IN SLURRY CASTING USING GYPSUM MOLD
    4.
    发明专利
    PRODUCTION OF TRANSLUCENT ALUMINA IN SLURRY CASTING USING GYPSUM MOLD 失效

    公开(公告)号：JP2001048638A

    公开(公告)日：2001-02-20

    申请号：JP21855999

    申请日：1999-08-02

    Applicant: AGENCY IND SCIENCE TECHN

    Inventor： HOTTA YUJI ,  ODA KIICHI ,  SANO SABURO ,  TOMONO TAKUMI

    IPC: C04B35/115 ,  C04B35/622

    Abstract: PROBLEM TO BE SOLVED: To produce translucent alumina in slurry casting using a gypsum mold. SOLUTION: When a molding produced by the casting of an alumina slurry using a gypsum mold is sintered to produce an alumina sintered body, the molding is freed of impurities derived from the gypsum mold by acid treatment to enhance the translucency of the alumina sintered body. An alumina slurry is poured into a gypsum mold to form a molding, this molding is dried, calcined and immersed in an acid to remove contaminants from the molding contaminated with gypsum components in casting and drying, and then the molding is dried and sintered to obtain the objective translucent alumina.

    METHOD FOR EVALUATING PLASTICITY OF TEMPERED SOIL
    5.
    发明专利
    METHOD FOR EVALUATING PLASTICITY OF TEMPERED SOIL 失效

    公开(公告)号：JPH1183719A

    公开(公告)日：1999-03-26

    申请号：JP24821997

    申请日：1997-09-12

    Applicant: AGENCY IND SCIENCE TECHN ,  CERAMICS SUIKASO SEIKEI GIJUTS

    Inventor： SHIBAZAKI YASUO ,  ODA KIICHI ,  SANO SABURO ,  TOMONO TAKUMI ,  KAWAI HIDEJI ,  OGURI KENTA ,  NOMURA YUJI ,  ONO AKIRA

    IPC: G01N11/00 ,  G01N3/00 ,  G01N33/24

    Abstract: PROBLEM TO BE SOLVED: To provide a method for evaluating plasticity of a tempered soil wherein plasticity of a tempered soil under such condition as close to a closed space is evaluated with ease. SOLUTION: At a bottom part of a cylinder 1, a nozzle plate 3 comprising a nozzle hole 2 is fixed with a lock nut 4. A sample S sandwiched between filter papers F is put in the cylinder 1, and pressed by a piston 5. The sample S is pressurized to reduce its volume. Solid volume ratio between when pressurized under low pressure and when under a high pressure is measured, and plasticity is evaluated from its difference. The larger the solid volume ratio difference between when pressurized under low pressure and pressurized under high pressure, the more preferable the filling characteristics of a tempered soil in a closed space.

    HIGHLY PLASTIC ALUMINA PASTE AND ITS PRODUCTION
    6.
    发明专利
    HIGHLY PLASTIC ALUMINA PASTE AND ITS PRODUCTION 失效

    公开(公告)号：JP2000119060A

    公开(公告)日：2000-04-25

    申请号：JP29068998

    申请日：1998-10-13

    Applicant: AGENCY IND SCIENCE TECHN ,  NIKKO KK ,  YKK CORP

    Inventor： ONO AKIRA ,  SHIBAZAKI YASUO ,  ODA KIICHI ,  SANO SABURO ,  TOMONO TAKUMI ,  OGURI KENTA ,  KAWAI HIDEJI ,  NOMURA YUJI

    IPC: C04B35/628 ,  C01F7/02 ,  C04B35/10 ,  C04B35/632

    Abstract: PROBLEM TO BE SOLVED: To obtain a highly plastic alumina paste useful as a ceramic stock by incorporating alumina particles with agar-agar. SOLUTION: This highly plastic alumina paste is obtained by melting agar powder under boiling followed by cooling to form agar gel which is then kneaded with alumina particles; alternatively, by adding alumina particles to an aqueous solution of agar powder which is melted under boiling in advance, followed by cooling the system to effect coating the alumina surface with agar-agar followed by dehydration; wherein it is preferable that the agar-agar to be used as a starting material is >=5 g/cm2 in jelly strength, and the agar content of the final alumina paste is 0.5-10 wt.%. This alumina paste obtained by mixing (kneading) process is capable of controlling its pore size depending on its gel size, therefore being advantageous for making porous forms; whereas another version of this alumina paste obtained by coating process is hard to produce pores because the agar-agar as binder uniformly and extremely thinly adheres to the alumina, therefore affording a dense sintered compact, dense/high- density molded form or molded form with controlled pore size. The above method for producing this alumina paste is effective in cost reduction and operability improvement.

    PLASTICITY IMPROVEMENT IN KAOLINITE
    7.
    发明专利
    PLASTICITY IMPROVEMENT IN KAOLINITE 失效

    公开(公告)号：JPH11228210A

    公开(公告)日：1999-08-24

    申请号：JP4878098

    申请日：1998-02-13

    Applicant: AGENCY IND SCIENCE TECHN

    Inventor： SHIBAZAKI YASUO ,  ODA KIICHI ,  SANO SABURO ,  TOMONO TAKUMI ,  OGURI KENTA ,  KAWAI HIDEJI ,  NOMURA YUJI ,  ONO AKIRA

    IPC: C04B33/04

    Abstract: PROBLEM TO BE SOLVED: To provide a method for improving the plasticity of natural kaolinite and artificial kaolinite. SOLUTION: A kaolinite is brought into contact with an aqueous solution containing NH4 to adsorb NH4 on the surface of the kaolinite. The kaolinite is brought into contact with an aqueous solution containing a divalent cation and the NH4 adsorbed on the surface of the kaolinite is substituted with the divalent cation. The aqueous solution containing NH4 is an aqueous solution of CH3 COONH4 or an aqueous solution of NH4 Cl and Mg or Ca is used as the divalent cation.

Patent Agency Ranking