In this paper, the structural properties and the electrical conductivity of LaPrNbO (x = 0.00, 0.05, 0.1, 0.15, 0.2, 0.3) and PrNbO are presented and discussed. All synthesized samples crystallized in a monoclinic structure with similar thermal expansion coefficients. The phase transition temperature between the monoclinic and tetragonal structure increases with increasing praseodymium content from 500 °C for undoped LaNbO to 700 °C for PrNbO. Thermogravimetry, along with X-ray photoelectron spectroscopy, confirmed a mixed 3/4 oxidation state of praseodymium. All studied materials, in humid air, exhibited mixed protonic, oxygen ionic and hole conductivity. The highest total conductivity was measured in dry air at 700 °C for PrNbO, and its value was 1.4 × 10 S/cm.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8954274 | PMC |
| http://dx.doi.org/10.3390/ma15062267 | DOI Listing |
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