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    32.
    发明专利
    未知

    公开(公告)号：NO20051492L

    公开(公告)日：2005-05-13

    申请号：NO20051492

    申请日：2005-03-21

    Applicant: DEGUSSA

    Inventor： SCHNEIDER GERRIT ,  LORTZ WOLFGANG ,  BATZ-SOHN CHRISTOPH ,  PERLET GABRIELE ,  WILL WERNER ,  NEUGEBAUER PETER

    IPC: C01B33/148 ,  C09C1/30 ,  C01B33/149

    Abstract: Aqueous dispersion containing silicon dioxide powder, which is stable in a pH range of 2 to 6, which contains a cation-providing compound that is at least partially soluble in this pH range and the zeta potential of which is less than or equal to zero. It is produced by bringing silicon dioxide powder and at least one cation-providing compound into contact whilst moving in an aqueous medium. The dispersion can be used for chemical-mechanical polishing of metal surfaces.

    34.
    发明专利
    未知

    公开(公告)号：DE10238463A1

    公开(公告)日：2004-03-04

    申请号：DE10238463

    申请日：2002-08-22

    Applicant: DEGUSSA

    Inventor： LORTZ WOLFGANG ,  BATZ-SOHN CHRISTOPH ,  PERLET GABRIELE ,  WILL WERNER ,  SCHNEIDER GERRIT ,  NEUGEBAUER PETER

    IPC: C01B33/148 ,  C09C1/30 ,  C01B33/26 ,  C09C3/06

    Abstract: Aqueous dispersion containing silicon dioxide powder, which is stable in a pH range of 2 to 6, which contains a cation-providing compound that is at least partially soluble in this pH range and the zeta potential of which is less than or equal to zero. It is produced by bringing silicon dioxide powder and at least one cation-providing compound into contact whilst moving in an aqueous medium. The dispersion can be used for chemical-mechanical polishing of metal surfaces.

    Auf organischem Lösungsmittel basierende Metalloxid-Dispersion
    38.
    发明专利
    Auf organischem Lösungsmittel basierende Metalloxid-Dispersion 未知

    公开(公告)号：DE102011075918A1

    公开(公告)日：2012-11-22

    申请号：DE102011075918

    申请日：2011-05-16

    Applicant: EVONIK DEGUSSA GMBH

    Inventor： LORTZ WOLFGANG DR ,  PERLET GABRIELE ,  DIENER UWE

    IPC: B01J13/00 ,  H01G9/20

    Abstract: Metalloxidpartikel enthaltende Dispersion, bei der a) die Metalloxidpartikel a1) ausgewählt sind aus einem oder mehreren Oxiden der Gruppe bestehend Titandioxid, Ceroxid, Zinkoxid und Zirkondioxid a2) mit einem Anteil von wenigstens 25 Gew.-% in der Dispersion vorliegen, a3) einen mittleren Aggregatdurchmesser von 20 bis 120 nm aufweisen und b) die flüssige Phase b1) 90 bis 99,5 Gew.-% eines oder mehrerer Alkanole CnH2n+1OH mit n = 2 bis 4, b2) 0,5 bis 10 Gew.-% einer oder mehrerer α,&bgr;-ungesättigter Carbonsäuren mit 4 bis 12 C-Atomen, b3) 0 bis 2 Gew.-% eines oder mehrerer Alkandiole HO(CH2)xOH mit x = 2 bis 4, b4) maximal 5 Gew.-% ieradditive aus der Gruppe bestehend aus polyoxyethylenierten Alkyletherphosphaten, polyoxyethylenierten Aryletherphosphaten; Alkylolammoniumsalzen von Block-Copolymeren mit aciden Gruppen; Polyalkylenglykolen, Polyalkyleniminen, Polyalkylenalkoholen enthält. Verwendung der Dispersion zur Herstellung von Farbstoffsolarzellen.

    39.
    发明专利
    未知

    公开(公告)号：AT533579T

    公开(公告)日：2011-12-15

    申请号：AT09005986

    申请日：2009-04-30

    Applicant: EVONIK DEGUSSA GMBH ,  CT FOR ABRASIVES & REFRACTORIES RES & DEV CARRD GMBH

    Inventor： TONTRUP CHRISTOPH ,  LORTZ WOLFGANG ,  PERLET GABRIELE ,  SCHMIDT-KLUGE ERICH ,  FRULLI DANILO

    IPC: B22C9/02 ,  B22C1/08 ,  B22C9/22 ,  B22C9/24 ,  B22C13/08

    Abstract: Slurry comprises: (a) from 50 to 80% by weight, of refractory particles having an average particle size of from 0.5 mu m to 150 mu m; (b) from 5 to 35% by weight, of aluminum oxide particles having an average particle diameter of less than 300 nm; and (c) from 5 to 35% by weight of water, with a pH of from 5 to 12. Independent claims are: (1) a method for producing the slurry, characterized in that an aqueous dispersion which contains (a) aluminum oxide particles having an average particle diameter of less than 300 nm as solid; and (b) has a content of aluminum oxide particles of more than 15% by weight; and has (c) a pH of from 5 to 12, is admixed with (b) refractory particles having an average particle size of from 0.5 mu m to 150 mu m; and (d) if appropriate, additives; (2) an aqueous dispersion of aluminum oxide particles, characterized in that: (a) the aluminum oxide particles have an average particle diameter of less than 300 nm; (b) the content of aluminum oxide particles is more than 15% by weight; (c) the dispersion additionally contains one or more additives selected from antifoams, wetting agents, polymers, polyphosphates, metal-organic compounds and antibacterial agents; and (d) the dispersion contains a buffer system and has a pH of from 5 to 12; (3) a process for producing a casting mold comprising: (a) dipping of a preshaped meltable model into the slurry; (b) coating of the surface of the model which is covered with the slurry by sanding with coarse, refractory particles having an average particle size of from not > 50 mu m to 1000 mu m; and (c) drying of the coated surface, where the steps (a) to (c) are repeated as often as desired until the number of coating layers required for the casting mold has been reached; and (4) a casting mold produced by a process.

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