Patent · US Expired

Process for making a high temperature-resistant ceramic material with an adjustable thermal expansion coefficient and method of use of same

US6274525A · kind A · utility

13Cited by

7References

24Claims

0Family size

Assignee

Schott Glas · DE

Inventors

Janusz Zborowski · Ingelheim am Rhein, DE
Uwe Eichhorn · Großerkmannsdorf, DE
Bartolome Aloy-Dols · Mainz, DE

Key dates

Filing date	Jul 22, 1999
Grant date	Aug 14, 2001
Priority date	—
Expiry date	Jul 22, 2019

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC04B2235/3222
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

The process for making the high temperature-resistant ceramic material from the MgO--Al.sub.2 O.sub.3 system includes burning a mixture containing a predetermined amount of magnesium oxide (MgO) of a predetermined grain size distribution in an amount range of from 30 to 99 parts by weight and a predetermined amount of magnesium aluminate (MgAl.sub.2 O.sub.4) of another different predetermined grain size distribution in a range of from 1 to 70 parts by weight to obtain a ceramic product having a thermal expansion coefficient and selecting the amounts of magnesium oxide and magnesium aluminate as well as the predetermined grain size distributions so that the thermal expansion coefficient of the ceramic product is substantially equal to that of platinum and platinum alloys and in a range of from 9.times.10.sup.-6 K.sup.-1 to 15.times.10.sup.-6 K.sup.-1.

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