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The effect of Fe 2+ state in electrical property variations of Sn‐doped hematite powders
Author(s) -
Song Sehwan,
Kim Jiwoong,
Lee Dooyong,
Lee Jisung,
Min Taewon,
Chae JongAh,
Bae JongSeong,
Lee Jaekwang,
Lee JeongSoo,
Park Sungkyun
Publication year - 2017
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.14908
Subject(s) - doping , hematite , electrical resistivity and conductivity , rietveld refinement , materials science , x ray photoelectron spectroscopy , analytical chemistry (journal) , phase (matter) , oxidation state , conductivity , chemical state , crystallography , crystal structure , chemical engineering , chemistry , metallurgy , metal , optoelectronics , organic chemistry , chromatography , electrical engineering , engineering
The structural, electrical, and chemical properties of Sn‐doped Fe 2 O 3 powders were investigated. Various quantities of Sn‐doped Fe 2 O 3 powders were synthesized using solid‐state reactions. Rietveld analysis for the powders that were doped below 2% revealed a phase‐pure Sn‐doped Fe 2 O 3 structure (i.e., identical to Fe 2 O 3 structure). Alternatively, the analysis for the powders that were doped more than 3% exhibited secondary phase. The unit cell volume and electrical conductivity of the phase‐pure samples increased with an increase in the doping concentration. X‐ray photoelectron spectroscopy measurements showed an increased Fe 2+ state with the increase in Sn doping concentration. Therefore, the improved electrical conductivity and unit cell volume with the increase in doping concentration of the phase‐pure powders might be related to the increased Fe 2+ state.