Brazing of SiO2 ceramic

Yi, Ruixiang; Chen, Chao; Li, Yuxiang; Chen, Shi; Ren, Xiaoqiang

doi:10.1007/s00170-021-06685-4

Cited by 11 publications

(2 citation statements)

References 88 publications

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“…Tables 1 and 2 show the XPS results of full-spectrum and Si split-peak fitting results, respectively. Elemental peak of Si appears on the surface of the ceramics before treatment due to a small amount of SiO 2 doped as an additive in the alumina ceramic preparation process [29]. When the precursor PDMS is added in the discharge region, chemical reactions occur between PDMS molecules and energetic particles in the plasma to generate PDMS fragments.…”

Section: Chemical Propertiesmentioning

confidence: 99%

Wet flashover voltage improvement of the ceramics with dielectric barrier discharge

Huang

Xie²,

Zhou

et al. 2023

Plasma Sci. Technol.

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Surface modification techniques with plasma are widely investigated to improve the surface insulation capability of polymers under dry conditions, while the relationship between treatment method, surface physical and chemical properties, and wet flashover voltage is still unclear for inorganic ceramics. In this paper, the surface insulation properties of ceramics under wet conditions are improved using nanosecond-pulsed dielectric barrier discharge with PDMS as the precursor. The relationships between PDMS concentration and the water contact angle, dry and wet flashover voltages are obtained to acquire the optimal concentration. The surface charge dissipation test and surface physio-chemical property measurement with SEM, AFM, XPS are carried out to further explore the mechanism of surface insulation enhancement. The results show that film deposition with micron thickness and superhydrophobicity occurs at the PDMS concentration of 1.5%. The dry flashover voltage is increased by 9.6% due to the induction of deep traps, while the wet flashover voltage is increased by 66.7%. The gap between dry-wet flashover voltage is decreased by 97.4% compared with the untreated one due to the self-cleaning effect.

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Section: Chemical Propertiesmentioning

confidence: 99%

Wet flashover voltage improvement of the ceramics with dielectric barrier discharge

Huang

Xie²,

Zhou

et al. 2023

Plasma Sci. Technol.

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“…As we know, there was no report on Bi 2 S 3 coated with electrospinning materials for removing radioactive iodine from the off-gas stream. SiO 2 nanoparticles as ceramic-based materials were widely used in the industry because of their non-toxicity, excellent thermochemical stability, and low-cost characteristics . The SiO 2 nanofiber not only combines the specific chemical, electronic, and ionic properties of SiO 2 but also exhibits a high specific surface and a three-dimensional (3D) structure of fibers, which make the SiO 2 nanofiber highly promising for many other applications .…”

Section: Introductionmentioning

confidence: 99%

Combining Electrospinning and Hydrothermal Methods to Prepare Bi₂S₃@SiO₂ Nanostructure-Based Membranes for Enhanced Capture Capacity of Off-Gas Iodine from a Nuclear Plant

Wang

Liu

et al. 2023

ACS Appl. Nano Mater.

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As the main fission products of nuclear power plants, radioactive iodine isotopes are of great concern because of their great harm to public safety. In this work, a nanocomposite of bismuth sulfide coated with the electrospinning SiO 2 nanofibers with a diameter of about 280 nm nanostructure-based membranes (Bi 2 S 3 @SiO 2 ) was successfully prepared to dispose of gaseous iodine. Results showed that the adsorption capacity of Bi 2 S 3 @SiO 2 for iodine can be up to 1180 mg g −1 , which is higher than the commercial silver-exchanged zeolite (AgZ) and other bismuth-based adsorbents. Chemisorption is the major adsorption behavior of iodine capture. Thermogravimetric analysis results demonstrated that the Bi 2 S 3 @SiO 2 nanocomposites were stable up to 300 °C before and after capturing iodine. X-ray diffraction results revealed that BiSI was initially formed and then transformed to BiI 3 . Scanning electron microscopy revealed that the sulfur element remains in the samples after interacting with iodine, and X-ray absorption near-edge spectra further confirmed that its oxidation states are a mixture of S 0 , S 3+ , and S 6+ . The oxidation states of bismuth and iodine are Bi 3+ and I − , respectively, revealed by X-ray photoelectron spectroscopy. The reactions between Bi 2 S 3 @SiO 2 nanocomposites and I 2 vapor are as follows: I 2 was reduced to be I − and the BiI 3 crystalline phase is the final form; S 2− in Bi 2 S 3 was oxidized to higher valences (S 0 , S 3+ , and S 6+ ), and amorphous phases are their final forms. The research results demonstrated that the nanostructure-based membranes prepared by this work would be a promising candidate nanomaterial for capturing iodine in the plant off-gas streams.

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Recent development of the novel riveting processes

Chen

Ouyang

et al. 2021

Int J Adv Manuf Technol

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Brazing of SiO2 ceramic

Cited by 11 publications

References 88 publications

Wet flashover voltage improvement of the ceramics with dielectric barrier discharge

Wet flashover voltage improvement of the ceramics with dielectric barrier discharge

Combining Electrospinning and Hydrothermal Methods to Prepare Bi₂S₃@SiO₂ Nanostructure-Based Membranes for Enhanced Capture Capacity of Off-Gas Iodine from a Nuclear Plant

Recent development of the novel riveting processes

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Brazing of SiO2 ceramic

Cited by 11 publications

References 88 publications

Wet flashover voltage improvement of the ceramics with dielectric barrier discharge

Wet flashover voltage improvement of the ceramics with dielectric barrier discharge

Combining Electrospinning and Hydrothermal Methods to Prepare Bi2S3@SiO2 Nanostructure-Based Membranes for Enhanced Capture Capacity of Off-Gas Iodine from a Nuclear Plant

Recent development of the novel riveting processes

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Product

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Combining Electrospinning and Hydrothermal Methods to Prepare Bi₂S₃@SiO₂ Nanostructure-Based Membranes for Enhanced Capture Capacity of Off-Gas Iodine from a Nuclear Plant