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A New Oxygen Sensor Based on the Thermoelectric Power of Solid Solutions of Nb 2 O 5 and Bi 2 O 3
Author(s) -
Chadwick A. V.,
Zhou W.,
Thomas J. M.
Publication year - 1989
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.198900751
Subject(s) - seebeck coefficient , oxygen , thermoelectric effect , partial pressure , solid solution , oxygen sensor , materials science , oxygen pressure , thermoelectric materials , analytical chemistry (journal) , thermodynamics , chemistry , physics , metallurgy , environmental chemistry , organic chemistry
One part of Nb 2 O 5 to 60 parts of Bi 2 O 3 suffices in order to achieve a reaction of Bi 2 O 3 of thermopower Θ sensitive to a change of oxygen pressure. The β‐phase of the solid solution of Nb 2 O 5 in Bi 2 O 3 , which is stable below 900 K, is a promising material for oxygen sensors which operate without the necessity of an oxygen reference pressure at relatively low temperatures. The reason for the rapid and reversible change of thermopower as a function of oxygen partial pressure is still unknown.
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