Effect of heat treatment on electrical and surface properties of tungsten oxide thin films grown by HFCVD technique

Tan, Guang-Lei; Tang, Dan; Dastan, Davoud; Jafari, Azadeh; Silva, José; Yin, Xi-Tao

doi:10.1016/j.mssp.2020.105506

Cited by 73 publications

(18 citation statements)

References 52 publications

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“…Meanwhile, the wear rate increases steadily during the speed from 15.7 to 39.3 m/s, and then increases sharply when the speed rises to 47.1 m/s like PF (shows in Figure 2b). This phenomenon is consistent with that of some relevant and recent reported papers, in which the friction coefficient and wear rate decreased with the increasing Gr content below 10 vol.% [46][47][48]. The specimen 20Gr has the same friction coefficient of 0.35 from the speed of 7.9 to 15.7 m/s.…”

Section: Friction and Wear Propertiessupporting

confidence: 92%

Tribological Behavior of Phenolic Resin-Based Friction Composites Filled with Graphite

Gao

et al. 2021

Materials

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In this paper, the influence of graphite (Gr) on the dry sliding tribological properties of phenolic resin (PF) composites was studied under different sliding speeds of 3.1–47.1 m/s. The wear mechanism was investigated by the observation of the morphology of the transfer layer during the dry sliding process. It was found that the addition of Gr could decrease the friction coefficient and wear rate effectively, and the friction coefficient and wear rate decreased with the increase of Gr content in the range of 10–30 vol.%. The dominant wear mechanisms of PF-based friction composites changed from adhesive wear to fatigue wear (in the form of peeling-off) in the high sliding speed condition after the addition of Gr. The addition of Gr effectively reduced the sensitivity of PF-based friction materials to sliding speeds, and thus enhanced the stability of the friction coefficient. When the content of Gr was above 20 vol.%, the stability of the friction coefficient was relatively steady.

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Section: Friction and Wear Propertiessupporting

confidence: 92%

Tribological Behavior of Phenolic Resin-Based Friction Composites Filled with Graphite

Gao

et al. 2021

Materials

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“…An X-ray diffractometer (XRD, l ¼ 0.1542 nm, D/Max-2550V, Rigaku, Japan) was used to analyze the sample structure. [28][29][30] The grain morphologies were characterized via scanning electron microscope/SEM (FEI Magellan 400, Oregon, USA). Transmission electron microscope/TEM (JEOL JEM-2100F) with a working voltage of 200 kV was used to reveal the ceramic microstructures.…”

Section: Methodsmentioning

confidence: 99%

Time dependence of domain structures in potassium sodium niobate-based piezoelectric ceramics

et al. 2021

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“…At present, gas sensors or similar devices mainly include electrochemical, − contact combustion, electrolyte, − surface sonic, infrared, semiconductor, − organic field-effect transistor, or some organic materials. , Most of the sensor devices have poor selectivity except infrared spectrum sensors. However, there are some limitations in the use of infrared sensors, such as the high cost, large size, and harsh environmental requirements.…”

Section: Introductionmentioning

confidence: 99%

Opposite Sensing Response of Heterojunction Gas Sensors Based on SnO₂–Cr₂O₃ Nanocomposites to H₂ against CO and Its Selectivity Mechanism

Yin

Wang

et al. 2021

Langmuir

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Metal oxide semiconductor (MOS) gas sensors show poor selectivity when exposed to mixed gases. This is a challenge in gas sensors and limits their wide applications. There is no efficient way to detect a specific gas when two homogeneous gases are concurrently exposed to sensing materials. The p–n nanojunction of xSnO2–yCr2O3 nanocomposites (NCs) are prepared and used as sensing materials (x/y shows the Sn/Cr molar ratio in the SnO2–Cr2O3 composite and is marked as Sn x Cr y for simplicity). The gas sensing properties, crystal structure, morphology, and chemical states are characterized by employing an electrochemical workstation, an X-ray diffractometer, a transmission electron microscope, and an X-ray photoelectron spectrometer, respectively. The gas sensing results indicate that Sn x Cr y NCs with x/y greater than 0.07 demonstrate a p-type behavior to both CO and H2, whereas the Sn x Cr y NCs with x/y < 0.07 illustrate an n-type behavior to the aforementioned reduced gases. Interestingly, the Sn x Cr y NCs with x/y = 0.07 show an n-type behavior to H2 but a p-type to CO. The effect of the operating temperature on the opposite sensing response of the fabricated sensors has been investigated. Most importantly, the mechanism of selectivity opposite sensing response is proposed using the aforementioned characterization techniques. This paper proposes a promising strategy to overcome the drawback of low selectivity of this type of sensor.

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Effect of heat treatment on electrical and surface properties of tungsten oxide thin films grown by HFCVD technique

Cited by 73 publications

References 52 publications

Tribological Behavior of Phenolic Resin-Based Friction Composites Filled with Graphite

Tribological Behavior of Phenolic Resin-Based Friction Composites Filled with Graphite

Time dependence of domain structures in potassium sodium niobate-based piezoelectric ceramics

Opposite Sensing Response of Heterojunction Gas Sensors Based on SnO₂–Cr₂O₃ Nanocomposites to H₂ against CO and Its Selectivity Mechanism

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Effect of heat treatment on electrical and surface properties of tungsten oxide thin films grown by HFCVD technique

Cited by 73 publications

References 52 publications

Tribological Behavior of Phenolic Resin-Based Friction Composites Filled with Graphite

Tribological Behavior of Phenolic Resin-Based Friction Composites Filled with Graphite

Time dependence of domain structures in potassium sodium niobate-based piezoelectric ceramics

Opposite Sensing Response of Heterojunction Gas Sensors Based on SnO2–Cr2O3 Nanocomposites to H2 against CO and Its Selectivity Mechanism

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Product

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Opposite Sensing Response of Heterojunction Gas Sensors Based on SnO₂–Cr₂O₃ Nanocomposites to H₂ against CO and Its Selectivity Mechanism