Substoichiometric molybdenum oxide ceramics have aroused widespread interest owing to their promising optical and electrical performance. In this work, the thermal stability and decomposition mechanism of MoO and MoO at 700-1000 °C and 700-1100 °C were investigated, respectively. Based on this information, MoO (2 < x < 3) bulk ceramics were prepared by spark plasma sintering (SPS). The results show that MoO is stable up to 790 °C in an argon atmosphere. As the temperature rises, it decomposes into MoO. MoO can exist stably at 830 °C, beyond which it will convert to MoO. The MoO ceramic bulks with four different components (MoO, MoO, MoO and MoO) were successfully sintered by SPS, and their relative density was greater than 96.4% as measured by the Archimedes principle. The reflectivity of MoO ceramic bulk is low and only 6.3% when the composition is MoO. The resistivity increases from 10 to 10 Ωcm with the increase in the O/Mo atomic ratio x. In general, the thermal stability information provides a theoretical basis for the processing of MoO materials, such as the sintering of the MoO target. The optical and electrical properties show that MoO is a low-reflective conductive oxide material with great photoelectric application value.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10096169PMC
http://dx.doi.org/10.3390/ma16072841DOI Listing

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