Global Patent Index - EP 1060149 A1

EP 1060149 A1 2000-12-20 - LOW CTE CORDIERITE BODIES WITH NARROW PORE SIZE DISTRIBUTION AND METHOD OF MAKING SAME

Title (en)

LOW CTE CORDIERITE BODIES WITH NARROW PORE SIZE DISTRIBUTION AND METHOD OF MAKING SAME

Title (de)

CORDIERITKÖRPER MIT ENGER PORENGRÖSSENVERTEILUNG UND GERINGER THERMISCHER AUSDEHNUNG, UND VERFAHREN ZU DEREN HERSTELLUNG

Title (fr)

CORPS DE CORDIERITE A FAIBLE COEFFICIENT DE DILATATION THERMIQUE, AYANT UNE REPARTITION ETROITE DE LA TAILLE DES PORES, ET PROCEDE DE FABRICATION DE CES CORPS

Publication

EP 1060149 A1 (EN)

Application

EP 99906790 A

Priority

  • US 9902641 W
  • US 7584698 P

Abstract (en)

[origin: WO9943629A1] Cordierite body of CTE at 25-800 DEG C of </=4 x 10<-7>C<-1>, at least 85 % of porosity having pore diameter of 0.5-5.0T; or >4-6 x 10<-7>C<-1>, porosity at least 30 vol %, at least 85 % of porosity has pore diameter 0.5-5.0T. Raw materials talc, Al2O3 source, and kaolin, calcined kaolin, and/or silica, and optionally spinel, particle diameter of talc </=3.0T, of Al2O3 source </=2.0T, kaolin is <35 wt.% of raw materials when particle diameter is <2.0T, are blended with vehicle and aids into plastic mixture. Green body is formed, dried, fired at 1370 DEG C-1435 DEG C. When particle diameter of talc is <2.0T, and Al2O3 source is <20 wt.% of raw materials, and dispersible high surface area Al2O3 source having particle diameter of <0.3T, is <5.0 wt.% of raw materials, and particle diameter of kaolin is <2.0T, heating rate from 1150 DEG C-1275 DEG C is >200 DEG C/hr. When particle diameter of talc is </= 2.0T, and Al2O3 source is <20 wt.% of raw materials, and dispersible high surface area Al2O3 source having particle diameter of <0.3T, is <5.0 wt.% of raw materials, and particle diameter of kaolin is <2.0T, heating rate from 1150 DEG C-1275 DEG C is >50 DEG C/hr and <600 DEG C/hr. When Al2O3 source is less than 20 wt.% of raw materials, and dispersible Al2O3 source having particle diameter <0.3T is >/= 5.0 wt.% of raw materials, and particle diameter of kaolin is </=2.0T, heating rate from 1150 DEG C-1275 DEG C is >50 DEG C/hr. When particle diameter of kaolin is >2.0T, heating rate from 1150 DEG C-1275 DEG C is </=600 DEG C/hr and > 30 DEG C/hr.

IPC 1-7 (main, further and additional classification)

C04B 35/18; C04B 35/20

IPC 8 full level (invention and additional information)

C04B 35/195 (2006.01); C04B 35/622 (2006.01); C04B 38/00 (2006.01)

CPC (invention and additional information)

C04B 35/195 (2013.01); C04B 38/00 (2013.01)

Designated contracting state (EPC)

BE DE FR GB

EPO simple patent family

WO 9943629 A1 19990902; CN 1287546 A 20010314; EP 1060149 A1 20001220; EP 1060149 A4 20020717; JP 2002504476 A 20020212

INPADOC legal status


2003-03-12 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20020813

2002-07-17 [A4] SUPPLEMENTARY SEARCH REPORT

- Ref Legal Event Code: A4

- Effective date: 20020605

2002-07-17 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): BE DE FR GB

2002-07-17 [RIC1] CLASSIFICATION (CORRECTION)

- Ref Legal Event Code: RIC1

- Free Format Text: 7C 04B 35/195 A, 7C 04B 38/00 B

2000-12-20 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20000922

2000-12-20 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): BE DE FR GB