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公开(公告)号：JPH072568A
公开(公告)日：1995-01-06
申请号：JP28201591
申请日：1991-10-03
Applicant: AGENCY IND SCIENCE TECHN , YOSHIDA KOGYO KK
Inventor： SHIBAZAKI YASUO , ODA KIICHI , FUKUDA YUSHI
IPC: C04B35/632 , C04B35/10
Abstract: PURPOSE:To provide an alumina material excellent in plasticity. CONSTITUTION:This alumina plastic material is prepared by blending and kneading a plate-shaped powdery alumina having
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公开(公告)号：JPH06263430A
公开(公告)日：1994-09-20
申请号：JP16216591
申请日：1991-06-06
Applicant: AGENCY IND SCIENCE TECHN
Inventor： MAEDA MASAKI , ODA KIICHI , SHIBAZAKI YASUO , TONE YUKIHITO
Abstract: PURPOSE:To provide a method for improving the plasticity of kaolinite particles by which the molding of the kaolinite particles is enabled without adding a binder, etc., by improving the plasticity of the kaolinite particles themselves having low plasticity. CONSTITUTION:Kaolinite particles are brought into contact with an aq. soln. contg. divalent cations and the cations are adsorbed on the surfaces of the kaolinite particles by ion exchange to increase WR value and CV value as indexes evaluating the plasticity of kaolinite particles.
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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.
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公开(公告)号：JP2000133983A
公开(公告)日：2000-05-12
申请号：JP30754398
申请日：1998-10-28
Applicant: AGENCY IND SCIENCE TECHN , KOKUSAI KIBAN ZAIRYO KENKYUSHO
Inventor： INUI TETSUJI , ODA KIICHI , KONISHI KOICHI
Abstract: PROBLEM TO BE SOLVED: To provide a matching radio wave absorbing body which can be easily regulated in matching frequencies and whose matching frequencies can be widened in band width. SOLUTION: A matching-type radio wave absorbing body is equipped with a radio wave absorbing medium lined with a metallic body. The radio wave absorbing medium is a magnetic material layer, and a laminate composed of a radio wave absorbing medium layer and the metallic layer is laminated into a laminate which functions as a resonator possessed of two resonant modes of two different resonant frequencies to the radio wave absorbing medium layer of the same thickness as that of the laminate. The resonant frequency f1 of one resonant mode out of two different resonant modes that belong to the resonator is less than frequencies where the frequency dispersion of the permeability of the radio wave absorbing medium becomes a constant, the other resonant frequency f2 is more than the frequencies where the frequency dispersion of the permeability of the radio wave absorbing medium becomes a constant. By a combination of these two modes, the radio wave absorption characteristics of a radio wave absorbing body of this constitution is determined on a load Q in a state where two modes are combined, and the radio wave absorbing body is widened in the band width of radio waves to absorb. A resonator is regulated in operating frequency band by adjusting a radio wave absorbing medium layer in thickness and permittivity.
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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
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.
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Patent Agency Ranking
公开(公告)号：JPH08144387A
公开(公告)日：1996-06-04
申请号：JP28314394
申请日：1994-11-17
Applicant: AGENCY IND SCIENCE TECHN , INAX CORP
Inventor： SHIBAZAKI YASUO , ODA KIICHI , SANO SABURO , MAEDA MASAKI , MURAGUCHI YUKITO , FUKUMIZU HIROSHI , KOSAKA MINEO
IPC: E04B1/64
Abstract: PURPOSE: To obtain the humidity adjusting building material at a low cost by mixing allophane or imogolite and the setting hardening agent, and forming them for setting, or mixing the allophane or imogolite with the ceramics raw material, and burning it so as to form the building material for forming a space. CONSTITUTION: Allophane or imogolite as a main body of the volcanic ash soil is mixed with the setting hardening agent such as mortar, gypsum, slaked lime, dolomite, and water is added thereto for kneading at need, and after forming, it is hardened by steam curing. Or, allophane or imogolite is singly used, or mixed with the ceramics raw material, and formed, burned so as to form the humidity adjusting building material. In this case, the reinforcing material and the pigment can be added at need. This humidity adjusting building material is applied to wall, floor, ceiling, shelf, and door so as to absorb the moisture, and the generation of dew condensation and mold is prevented. The building material having the excellent' moisture absorbing characteristic can be thereby obtained at a low cost.
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公开(公告)号：JPH06316413A
公开(公告)日：1994-11-15
申请号：JP32466492
申请日：1992-11-11
Applicant: AGENCY IND SCIENCE TECHN , Y K K KK
Inventor： SHIBAZAKI YASUO , ODA KIICHI , FUKUDA YUSHI
Abstract: PURPOSE:To efficiently produce a lamellar alumina particle suitable for a pigment for coating material or a raw material for ceramics. CONSTITUTION:This producing method is one by containing or adding a crystal control agent (NaOH, Na2SiO3 or the like) into a aluminum hydroxide or alumina hydrate adjusted in particle size and hydrothermal synthesis treating (at >=350 deg.C, -0.022mol and 2.25X10-3-0.090mol per 1mol Al(OH)3 respectively. As a result, the lamellar alumina particle uniform in particle diameter and large in aspect ratio is obtained and the particle has excellent effect for applications such as the pigment for coating material, for ceramics molding and for an abrasive material. And the lamellar alumina particle is obtained even by using a low purity raw material.
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公开(公告)号：JPH0517132A
公开(公告)日：1993-01-26
申请号：JP19366891
申请日：1991-07-09
Applicant: AGENCY IND SCIENCE TECHN , YOSHIDA KOGYO KK
Inventor： SHIBAZAKI YASUO , ODA KIICHI , FUKUDA YUSHI
Abstract: PURPOSE:To efficiently obtain fine plate particles of alumina having uniform particle diameter of submicron order by adjusting the particle diameter of aluminum hydroxide, etc., and subjecting the aluminum hydroxide to hydrothermal treatment under specific condition in water or an aqueous solution of an alkali. CONSTITUTION:The starting raw material consisting of aluminum hydroxide or hydrated alumina is crushed and adjusted to the particle size of submicron order. The starting raw material having adjusted particle size is filled in an autoclave together with water or an aqueous solution of an alkali (sodium hydroxide or sodium carbonate) and subjected to hydrothermal treatment at >=350 deg.C under a pressure of
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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.
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公开(公告)号：JP2000109323A
公开(公告)日：2000-04-18
申请号：JP29453498
申请日：1998-10-01
Applicant: TODA KOGYO CORP , AGENCY IND SCIENCE TECHN
Inventor： YAMAMOTO AKINORI , KATAMOTO TSUTOMU , SHIBAZAKI YASUO , ODA KIICHI
Abstract: PROBLEM TO BE SOLVED: To provide the production process of well-oriented platelike spinel-type ferrite powdery particles which are appropriately used as a radio wave absorptive material or electromagnetic-shielding material. SOLUTION: This production process for producing the objective platelike spinel-type ferrite powdery particles, consists of a first stage and a second stage. The first stage comprises: adding a water-soluble salt of Ni or its aqueous solution to an aqueous liquid suspension of platelike hematite powdery particles; thereafter, adjusting the pH of the resulting suspension to 9.0-14.0; aging this suspension at 0-30 deg.C to coat the surface of each of platelike hematite particles with hydroxide or oxide of Ni; and thereafter, calcining the coated hematite particles at 500-700 deg.C by heating them to obtain powdery particles of an Ni-containing platelike calcined material. The second stage comprises: adding a water-soluble salt of Ni or its aqueous solution to an aqueous liquid suspension of the Ni-containing platelike calcined material powdery particles obtained in the stage 1; thereafter, adjusting the pH of the resulting suspension to 9.0-14.0; aging this suspension at 0-30 deg.C to coat the surface of each of the Ni-containing platelike calcined material powdery particles with hydroxide or oxide of Ni; and thereafter, firing the coated powdery particles at 800-1,200 deg.C by heating them to obtain platelike spinel-type ferrite powdery particles.
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