公开(公告)号：AT251602T

公开(公告)日：2003-10-15

申请号：AT98935971

申请日：1998-07-23

Applicant: CORNING INC

Inventor： CHALASANI DEVI ,  FISCHER MICHAEL ,  MALARKEY CHRISTOPHER J ,  MCCARTHY KEVIN R ,  STUTTS BRIAN E ,  ZAK MICHAEL E

IPC: B28B3/20 ,  C04B35/195 ,  C04B35/622 ,  C04B35/632 ,  C04B35/636 ,  C04B38/00

Abstract: Powder mixtures and a method of forming and shaping the mixtures. The method involves compounding the components of powder materials, binder, solvent for the binder, surfactant, and non-solvent with respect to at least the binder, the solvent, and the powder materials. The non-solvent is lower in viscosity than the binder combined with the solvent. The solvent is present in an amount that is less than the amount that would be present otherwise. The components are mixed and plasticized, and shaped to form a green body. The choice of components results in improved wet green strength in the green body. The method is especially useful for extrusion processing of aqueous binder systems such as water and cellulose ethers and hydrophobic non-solvents, to form structures such as honeycombs. In the body, the ratio, upon subsequent firing, of the isostatic strength to the A-axis strength is at least about 20 % higher than in bodies made without the mixture composition of the invention. A honeycomb body having a ratio of the isostatic strength to the A-axis strength of at least about 0.33 upon firing.

公开(公告)号：DE69910392D1

公开(公告)日：2003-09-18

申请号：DE69910392

申请日：1999-06-02

Applicant: CORNING INC

Inventor： BEALL M ,  CHALASANI DEVI ,  MALARKEY J

IPC: B28B3/20 ,  C04B35/195 ,  C04B35/622 ,  C04B35/632 ,  C04B38/00

Abstract: A binder system for use in the formation of ceramic or other powder-formed greenware including a binder, a solvent for the binder, a surfactant, and a component that is non-solvent with respect to the binder and solvent. The non-solvent component exhibits a lower viscosity than the solvent when containing the binder and includes a low molecular weight oil having a 90% recovered distillation temperature range of between about 220 to 400° C. Also disclosed is a process of forming and shaping plasticized powder mixtures and a process for forming ceramic articles utilizing the binder system.

公开(公告)号：DE69905315D1

公开(公告)日：2003-03-20

申请号：DE69905315

申请日：1999-07-14

Applicant: CORNING INC

Inventor： BEALL DOUGLAS M ,  CHALASANI DEVI

IPC: B01J21/14 ,  B01J32/00 ,  B01J35/04 ,  C04B35/00 ,  B01J37/00 ,  C04B35/195 ,  C04B38/00 ,  F01N3/28

Abstract: A plasticizable raw material mixture for use in preparing a substrate having cordierite as its primary phase with the mixture comprised of a chemical composition, percent by weight, of 11 to 17% MgO, 33 to 41% Al2O3 and, 46 to 53% SiO2. The raw material mixture specifically comprises the following: (1) one source of Al2O3 and SiO2 comprising a clay mixture having less than about 22 %, by weight based on the total raw materials in the plasticizable mixture, of calcined clay; (2) an alumina yielding precursor comprising alumina having an average particle diameter of about 1 mu m or less; and, (3) at least one source of magnesia having an average particle diameter of between about 3 to 15 microns. This invention additionally relates to a method of producing a green body of cordierite-forming materials comprising preparing a plasticizable raw material mixture of the aforementioned composition, adding an organic binder system to the mixture and mixing the mixture to form an extrudable mixture, and extruding the mixture to form a substrate of the desired configuration. The green body is dried and fired to yield a ceramic substrate having cordierite as its primary phase.

公开(公告)号：DE69811381D1

公开(公告)日：2003-03-20

申请号：DE69811381

申请日：1998-08-05

Applicant: CORNING INC

Inventor： BOOKBINDER W ,  CHALASANI DEVI ,  DILLON P ,  MCCARTHY R ,  STUTTS E ,  ZAK E

IPC: B28B3/20 ,  B28C7/00 ,  C04B35/195 ,  C04B35/622 ,  C04B35/632 ,  C04B35/636 ,  C04B38/00

Abstract: A method for forming and shaping powder mixtures involves compounding, homogenizing, and plasticizing components to form a mixture. The components are powder materials, binder, solvent for the binder, surfactant, and non-solvent with respect to at least the binder, the solvent, and the powder materials. The non-solvent is lower in viscosity than the binder combined with the solvent. The components are chosen to result in improved wet green strength in the subsequently formed green body. The compounding is done by the steps of dry-mixing the powder material, surfactant and binder to form a uniform blend, adding the solvent to the resulting dry blend, and thereafter adding the non-solvent to the blend. The mixture is shaped by passing it through a low to moderate shear extruder, and then through a die to form a green body. The compounding and shaping steps are carried out at a temperature of no greater than ambient temperature. The method is especially suitable for RAM extrusion. Among the advantages, the method results in higher extrusion velocity, throughputs, and wet green strength, without increasing pressures and torques.

公开(公告)号：AU7083000A

公开(公告)日：2001-05-10

申请号：AU7083000

申请日：2000-08-25

Applicant: CORNING INC

Inventor： BEALL DOUGLAS M ,  CHALASANI DEVI ,  MERKEL GREGORY A ,  PENG YING L

IPC: C04B35/622 ,  B28B3/20 ,  B28B3/26 ,  C04B35/185 ,  C04B35/195 ,  C04B35/632 ,  C04B38/00

Abstract: A fired body and method of making involves compounding powder, binder, aqueous solvent for the binder, surfactant, and non-solvent with respect to at least the binder, the solvent, and the powder, with the addition of an organosilicon compound. The non-solvent is lower in viscosity than the binder combined with the solvent, and the amount of solvent is less than the amount that would be used absent the non-solvent. The components are mixed and plasticized and then shaped into a green body, which is then fired to produce the product body. The organosilicon compound enhances the stiffness in the green body afforded by other non-solvents, and results in increased strength and reduced cracking in the fired body, among other advantages.

公开(公告)号：ZA987721B

公开(公告)日：1999-05-26

申请号：ZA987721

申请日：1998-08-26

Applicant: CORNING INC

Inventor： CHALASANI DEVI ,  FISHER MICHAEL ,  MALARKEY CHRISTOPHER JOHN ,  MCCARTHY KEVIN ROBERT ,  STUTTS BRIAN ENSEL ,  ZAK MICHAEL ERNEST

IPC: B29C20060101 ,  B29C

公开(公告)号：ZA987299B

公开(公告)日：1999-03-30

申请号：ZA987299

申请日：1998-08-14

Applicant: CORNING INC

Inventor： BOOKBINDER ANDREA WEISS ,  CHALASANI DEVI ,  DILLON GREGORY PAUL ,  MCCARTHY KEVIN ROBERT ,  STUTTS BRIAN ENSEL ,  ZAK MICHAEL ERNEST

IPC: B29C20060101 ,  B29C

公开(公告)号：DE69818845T2

公开(公告)日：2004-08-19

申请号：DE69818845

申请日：1998-07-23

Applicant: CORNING INC

Inventor： CHALASANI DEVI ,  FISCHER MICHAEL ,  MALARKEY J ,  MCCARTHY R ,  STUTTS E ,  ZAK E

IPC: B28B3/20 ,  C04B35/195 ,  C04B35/622 ,  C04B35/632 ,  C04B35/636 ,  C04B38/00

Abstract: Powder mixtures and a method of forming and shaping the mixtures. The method involves compounding the components of powder materials, binder, solvent for the binder, surfactant, and non-solvent with respect to at least the binder, the solvent, and the powder materials. The non-solvent is lower in viscosity than the binder combined with the solvent. The solvent is present in an amount that is less than the amount that would be present otherwise. The components are mixed and plasticized, and shaped to form a green body. The choice of components results in improved wet green strength in the green body. The method is especially useful for extrusion processing of aqueous binder systems such as water and cellulose ethers and hydrophobic non-solvents, to form structures such as honeycombs. In the body, the ratio, upon subsequent firing, of the isostatic strength to the A-axis strength is at least about 20 % higher than in bodies made without the mixture composition of the invention. A honeycomb body having a ratio of the isostatic strength to the A-axis strength of at least about 0.33 upon firing.

公开(公告)号：DE69905315T2

公开(公告)日：2003-10-16

申请号：DE69905315

申请日：1999-07-14

Applicant: CORNING INC

Inventor： BEALL DOUGLAS M ,  CHALASANI DEVI

IPC: B01J21/14 ,  B01J32/00 ,  B01J35/04 ,  C04B35/00 ,  B01J37/00 ,  C04B35/195 ,  C04B38/00 ,  F01N3/28

Abstract: A plasticizable raw material mixture for use in preparing a substrate having cordierite as its primary phase with the mixture comprised of a chemical composition, percent by weight, of 11 to 17% MgO, 33 to 41% Al2O3 and, 46 to 53% SiO2. The raw material mixture specifically comprises the following: (1) one source of Al2O3 and SiO2 comprising a clay mixture having less than about 22 %, by weight based on the total raw materials in the plasticizable mixture, of calcined clay; (2) an alumina yielding precursor comprising alumina having an average particle diameter of about 1 mu m or less; and, (3) at least one source of magnesia having an average particle diameter of between about 3 to 15 microns. This invention additionally relates to a method of producing a green body of cordierite-forming materials comprising preparing a plasticizable raw material mixture of the aforementioned composition, adding an organic binder system to the mixture and mixing the mixture to form an extrudable mixture, and extruding the mixture to form a substrate of the desired configuration. The green body is dried and fired to yield a ceramic substrate having cordierite as its primary phase.

公开(公告)号：AT247081T

公开(公告)日：2003-08-15

申请号：AT99955467

申请日：1999-06-02

Applicant: CORNING INC

Inventor： BEALL DOUGLAS M ,  CHALASANI DEVI ,  MALARKEY CHRISTOPHER J

IPC: B28B3/20 ,  C04B35/195 ,  C04B35/622 ,  C04B35/632 ,  C04B38/00

Abstract: A binder system for use in the formation of ceramic or other powder-formed greenware including a binder, a solvent for the binder, a surfactant, and a component that is non-solvent with respect to the binder and solvent. The non-solvent component exhibits a lower viscosity than the solvent when containing the binder and includes a low molecular weight oil having a 90% recovered distillation temperature range of between about 220 to 400° C. Also disclosed is a process of forming and shaping plasticized powder mixtures and a process for forming ceramic articles utilizing the binder system.