Patent · US Expired

Low-expansion cordierite honeycomb bodies and method

US6214437A · kind A · utility

16Cited by
12References
10Claims
0Family size

Assignee

Inventors

Key dates

Filing dateNov 24, 1998
Grant dateApr 10, 2001
Priority date—
Expiry dateNov 24, 2018

Classification

  • Technology area (CPC Y)Emerging Cross-Sectional Technologies
  • CPC primaryY10T428/24149
  • WIPO fieldMaterials, metallurgy
  • WIPO sectorChemistry

Abstract

Cordierite honeycomb bodies having low coefficients of thermal expansion (CTE) and correspondingly high resistance to thermal shock, and a method for making them, wherein an alumina-yielding raw material having high specific surface area and which disperses into very fine particles in the batch, preferably together with fine talc as the sole batch source of magnesium, are disclosed; the use of fine talc enables the production of thin-walled extruded honeycomb structures exhibiting both low average CTE and high porosity, a combination particularly desirable for applications such as catalytic substrates for the control of combustion engine exhaust emissions.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.