公开(公告)号：JP2000053464A

公开(公告)日：2000-02-22

申请号：JP22250099

申请日：1999-08-05

Applicant: CORNING INC

Inventor： BEALL DOUGLAS M ,  CHALASANI DEVI

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

Abstract: PROBLEM TO BE SOLVED: To obtain a desired ceramic product with a cordierite structure by forming a green body having satisfactory wet strength and firing it while reducing a differential flow without causing cracks or defects. SOLUTION: A substrate with cordierite having a chemical compsn. contg. 11-17 wt.% MgO, 33-41 wt.% Al2O3 and 46-53 wt.% SiO2 as the predominant phase is formed. In particular, a plasticizable starting material mixture contg. (1) one feed source of Al2O3 and SiO2 including a clay mixture contg.

公开(公告)号：JPH10244527A

公开(公告)日：1998-09-14

申请号：JP30174397

申请日：1997-11-04

Applicant: CORNING INC

Inventor： CHALASANI DEVI ,  LOCKER ROBERT JOHN ,  SAWYER CONSTANCE BRADLEY

IPC: B28C1/16 ,  C03C17/34 ,  C04B35/622 ,  C04B35/628 ,  C04B35/636 ,  C08K9/08

Abstract: PROBLEM TO BE SOLVED: To improve extrusion behavior and product and to reduce a batch cost by bringing inorganic powder into contact with organic surface treating agent for reducing hydrophilic property before bringing the powder into contact with water or cellulose binder, then combining the water and selected binder component, and mixing it. SOLUTION: Oleic acid of organic surface treating agent is sprayed in a two arm mixer during mixing to coat hydrophilic alumina and clay component of baked clay and raw material clay-talc-alumina powder batch for manufacturing, for example, cordierite ceramic product. Thus, the coated powder is combined with the clay of the residual powder and the powder the talc. After the powder is mixed, predetermined weight ratios of water, sodium stearate lubricant and hydroxymethyl cellulose binder of cellulose binder are added to the back, completely mixed, and plasticized lump is formed. As a result, a less amount of the binder can be efficiently used, and handling suitability, and swelling strength of a formed product can be improved.

公开(公告)号：ES2192001T3

公开(公告)日：2003-09-16

申请号：ES99113766

申请日：1999-07-14

Applicant: CORNING INC

Inventor： BEALL DOUGLAS M ,  CHALASANI DEVI

IPC: B01J21/14 ,  B01J32/00 ,  B01J35/04 ,  B01J37/00 ,  C04B35/00 ,  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：AU8510798A

公开(公告)日：1999-03-01

申请号：AU8510798

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：CA2291165A1

公开(公告)日：1999-02-18

申请号：CA2291165

申请日：1998-07-23

Applicant: CORNING INC

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

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：DE69818845D1

公开(公告)日：2003-11-13

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：ZA200205008B

公开(公告)日：2003-02-27

申请号：ZA200205008

申请日：2002-06-21

Applicant: CORNING INC

Inventor： BEALL DOUGLAS M ,  CHALASANI DEVI

IPC: C04B35/195 ,  C04B35/632 ,  C04B35/634 ,  C04B35/636 ,  C04B38/00 ,  C09J101/28 ,  C04B ,  C08L

Abstract: A binder system for use in the formation of ceramic or other powder-formed greenware comprising 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 comprises at least a portion of a branched chain paraffin exhibiting a 90% recovered distillation temperature ranging between 205° C. to about 225° C. and a carbon chain length comprised predominantly of carbon chain distributions ranging from 12 to 14. 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：AT232512T

公开(公告)日：2003-02-15

申请号：AT98938324

申请日：1998-08-05

Applicant: CORNING INC

Inventor： BOOKBINDER ANDREA W ,  CHALASANI DEVI ,  DILLON GREGORY P ,  MCCARTHY KEVIN R ,  STUTTS BRIAN E ,  ZAK MICHAEL 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：WO0125284A2

公开(公告)日：2001-04-12

申请号：PCT/US0023606

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 ,  C08F

CPC classification number: C04B35/6325 ,  C04B35/185 ,  C04B35/195 ,  C04B38/0006 ,  C04B2111/00129 ,  C04B2111/00793 ,  C04B2111/343 ,  C04B38/06

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.

Abstract translation: 烧制体及其制造方法包括在至少粘合剂，溶剂和粉末中配合粉末，粘合剂，粘合剂，表面活性剂和非溶剂的水性溶剂，加入有机硅化合物。 非溶剂的粘度低于与溶剂结合的粘合剂，并且溶剂的量小于不含非溶剂时使用的量。 将组分混合并塑化，然后成形为生坯，然后将其烧制以产生产物体。 有机硅化合物增强了由其它非溶剂提供的生坯中的刚度，并且在烧结体中产生了增加的强度和降低的裂纹等优点。

公开(公告)号：WO9964370A9

公开(公告)日：2000-06-29

申请号：PCT/US9912208

申请日：1999-06-02

Applicant: CORNING INC

Inventor： BEALL DOUGLAS M ,  CHALASANI DEVI ,  JOHNSON RONALD E

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

CPC classification number: B28B3/269 ,  C04B35/195 ,  C04B35/622 ,  C04B35/632 ,  C04B38/0006 ,  C04B2111/00129

Abstract: A binder system for use in the formation of ceramic or other powder-formed greenware comprising 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 comprises at least a portion of an organic liquid having a 90 % recovered distillation temperature of no greater than about 225 DEG C and more preferably less than 220 DEG C. Also disclosed is a process of forming and shaping plasticized powder mixtures and a process for forming ceramic articles utilizing the binder system.

Abstract translation: 用于形成陶瓷或其它粉末形式的绿色软化剂的粘合剂体系，其包含粘合剂，粘合剂的溶剂，表面活性剂和相对于粘合剂和溶剂为非溶剂的组分。 当含有粘合剂时，非溶剂组分显示比溶剂低的粘度，并且包含至少一部分90％回收蒸馏温度不大于约225℃，更优选小于220℃的有机液体。 还公开了一种使增塑粉末混合物形成和成型的方法，以及利用该粘合剂体系形成陶瓷制品的方法。