Reversible temperature indicating materials

Details Reversible temperature indicating materials Reversible temperature indicating materials

1986-04-25

1988-02-02

Kyle, Deborah L.

Compositions

Nonreactive analytical, testing, or indicating compositions

G01N 3100

Patent

active

047225106

ABSTRACT:
A reversible temperature indicating material which is chemically stable, is not harmful and can be produced relatively inexpensively contains as principal component a polycrystalline bismuth-chromium oxide substance produced by firing a mixture with 50-86 molar % of bismuth-containing compounds and 50-14 molar % of chromium-containing compounds.

REFERENCES:
patent: 4059341 (1977-11-01), Zeller
patent: 4110259 (1978-08-01), Sichel
patent: 4150879 (1979-04-01), Bayard
patent: 4529448 (1985-07-01), Kohler et al.
patent: 4563220 (1986-01-01), Kohler et al.
patent: 4598979 (1986-07-01), Sugiuchi et al.

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