Electrical conductivity and thermal expansion behavior of MMoO4 (M=Ca, Sr and Ba)

Maji, Binoy Kumar; Jena, Hrudananda; Asuvathraman, R.; Kutty, K.V. Govindan

doi:10.1016/j.jallcom.2015.04.054

Cited by 31 publications

(22 citation statements)

References 19 publications

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“…The airsintered sample showed the presence of SrMoO 4 as the secondary phase, which was reported as insulating in nature. 47 It validates the low electrical conductivity observed in the as-sintered sample. Moreover, at low temperature, electrons produced by defect reaction (7) are expected to be localized at defect sites in the ceramic sample.…”

Section: B Effect Of Annealingsupporting

confidence: 74%

Double perovskite (Sr₂B′B″O₆) oxides for high-temperature thermoelectric power generation—A review

2018

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Section: B Effect Of Annealingsupporting

confidence: 74%

Double perovskite (Sr₂B′B″O₆) oxides for high-temperature thermoelectric power generation—A review

2018

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“…These data demonstrate that the molybdates under study have high LTEC values, approaching those reported for the SrMoO 4 molybdate [24]. prepared ceramic samples.…”

Section: Resultssupporting

confidence: 60%

Thermal Expansion of Scheelite-Like Molybdate Powders and Ceramics

et al. 2019

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Na x Sr 1 -2x Nd x MoO 4 (x = 0-0.5, Δx = 0.1) solid solutions with the scheelite structure have been synthesized for the first time and their crystallographic parameters have been determined as functions of composition and temperature. Their thermal expansion coefficients have been determined in the temperature range 25-1000°C: α a = (12.9-14.9) × 10 -6 °C -1 and α c = (24.9-25.9) × 10 -6 °C -1 . Using spark plasma sintering at t max ≈ 872-985°C and τ ≈ 650-750 s, we have prepared ceramics with relative densities in the range 97-99%.

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“…The E A values calculated for nano-SrMoO 4 and micro-SrMoO 4 were 1.63 and 1.98 eV, respectively. Both values are higher than the values previously reported in the literature [92]. In this work, it is assumed that the Schottky barriers among the grains were formed due to the existence of interstitial oxygen ions and the trapping of electrons from the conduction band [93].…”

Section: Electrical Characterization Of Micro-and Nano-srmoo 4 Sensinmentioning

confidence: 59%

Molybdenum and tungsten oxide based gas sensors for high temperature detection of environmentally hazardous sulfur species

Çiftyürek

Sabolsky

2016

Sensors and Actuators B: Chemical

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a b s t r a c tThere is an increasing desire to control and monitor gas emissions from coal-fired power plants and other industrial systems. With this desire, there is a growing need for distributed gas sensors to monitor these emissions at high temperature ( > 600 • C), especially for pollutants such as SO 2 and H 2 S. The objective of this work was to investigate molybdenum and tungsten binary and ternary oxide thick films on a chemiresistive sensor platform for monitoring of gas sulfur species. The work evaluated the SO 2 sensitivity of WO 3 , MoO 3 , SrMoO 4 , NiMoO 4 , Sr 2 MgMoO 6-␦ (SMM), Sr 2 MgWO 6-␦ (SMW), NiWO 4 , and SrWO 4 compositions at 600-1000 • C. The SrMoO 4 composition at both the micro-and nano-particulate scale showed the most promise in sensitivity, stability and selectivity to SO 2 up to 1000 • C. Hydrothermallysynthesized nano-SrMoO 4 showed the highest sensor response with the R max values of −17.2, −50.2 and −40.5 upon exposure to a 20 min pulse of 2000 ppm of SO 2 at 600 • C, 800 • C and 1000 • C, respectively. Similar sensitivity trends were distinguished down to 1-5 min SO 2 pulses. The nano-SrMoO 4 showed low cross-selectivity to H 2 and CO. Finally, the nano-SrMoO 4 sensor was also tested with H 2 and coal syngas containing 5-100 ppm H 2 S, where high sensitivities were realized for both, but the sensing mechanism was altered in the latter (n-type to p-type semiconducting behavior). In order to better understand the sensing mechanism, extensive microstructural, electronic and chemical property characterizations were completed in this work.

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Electrical conductivity and thermal expansion behavior of MMoO4 (M=Ca, Sr and Ba)

Cited by 31 publications

References 19 publications

Double perovskite (Sr₂B′B″O₆) oxides for high-temperature thermoelectric power generation—A review

Double perovskite (Sr₂B′B″O₆) oxides for high-temperature thermoelectric power generation—A review

Thermal Expansion of Scheelite-Like Molybdate Powders and Ceramics

Molybdenum and tungsten oxide based gas sensors for high temperature detection of environmentally hazardous sulfur species

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Electrical conductivity and thermal expansion behavior of MMoO4 (M=Ca, Sr and Ba)

Cited by 31 publications

References 19 publications

Double perovskite (Sr2B′B″O6) oxides for high-temperature thermoelectric power generation—A review

Double perovskite (Sr2B′B″O6) oxides for high-temperature thermoelectric power generation—A review

Thermal Expansion of Scheelite-Like Molybdate Powders and Ceramics

Molybdenum and tungsten oxide based gas sensors for high temperature detection of environmentally hazardous sulfur species

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Product

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Double perovskite (Sr₂B′B″O₆) oxides for high-temperature thermoelectric power generation—A review

Double perovskite (Sr₂B′B″O₆) oxides for high-temperature thermoelectric power generation—A review