Method of making lead and bismuth ruthenate and iridate pyrochlore compounds
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 20, 1980
Issued Date -
N/A
app pub date -
Nov 1, 1978
filing date -
Dec 2, 1977
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A liquid solution method of preparing electrically conductive pyrochlore compounds having the formula: A.sub.2 [B.sub.2-x A.sub.x ]O.sub.7-y is disclosed wherein A is selected from lead, bismuth and mixtures thereof, B is selected from ruthenium, iridium and mixtures thereof, 0.ltoreq..times..ltoreq.1.0 and 0.ltoreq.y.ltoreq.1. The method involves reacting A and B cations to yield a pyrochlore oxide by precipitation of A and B cations in a liquid medium having a pH which is equal to or greater than 4.5, but less than 13.5, in the presence of an oxygen source at a temperature below about 200.degree. C. for a time sufficient for reaction to occur. In those instances in which amorphous reaction products are obtained, these amorphous reaction products are subsequently heat treated at a temperature of about 200.degree. C. to about 600.degree. C. for a time sufficient to convert amorphous reaction products to crystalline pyrochlore(s).
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully