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Facile high‐performance film thermocouple made of strontium lanthanum chromate for temperature sensing in air
Author(s) -
Liu Dan,
Shi Peng,
Ren Wei,
Liu Yantao,
Liu Ming,
Niu Gang,
Lin Qijing,
Tian Bian,
Jiang Zhuangde,
Ye ZuoGuang
Publication year - 2018
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.15878
Subject(s) - thermocouple , materials science , lanthanum , reproducibility , electrode , chromate conversion coating , strontium , calibration , temperature measurement , thermal stability , resistor , analytical chemistry (journal) , composite material , coating , chemical engineering , electrical engineering , chemistry , inorganic chemistry , voltage , thermodynamics , statistics , mathematics , physics , organic chemistry , chromatography , engineering
Film thermocouples as the most effective tool are used to monitor the real‐time and accurate in situ temperature in harsh environment, which will demand their electrodes with high thermal‐resistant properties, high sensitivity, and stability. In this work, a series of solid solutions based on strontium lanthanum chromate were systematically investigated as new electrodes. LaCrO 3 and La 0.8 Sr 0.2 CrO 3 with some glass additives were chosen to fabricate high‐performance thick‐film thermocouple due to a bigger Fermi level difference between them. The thermocouple shows a high sensitivity (107.8 μV/°C) during static calibration, and an excellent reproducibility and stability during multicycle calibrations carried out up to 1550°C, resulting in a record ultra‐high temperature sensing in film thermocouples. This facile thermocouple may open up a new way to measure high temperature in air or oxidation atmosphere accurately.