Investigation of the devitrification and microwave penetrating properties of fused silica

Zhu, Yong; Pan, Yubai; Xu, Heng; Guo, Jin

doi:10.1016/j.jnoncrysol.2009.03.002

Cited by 18 publications

(5 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These findings clearly established the successful incorporation of CuS nanoparticles into the RGO sheet . It is anticipated that the observed increase in the crystallinity could also account for the observed improvement in electrochemical performance and EMI shielding property of CuS/RGO nanocomposites. , XRD patterns of RGCS12 and RGCS17 also showed the presence of an additional intense peak at ∼21° in all probability due to the formation of residual intercalation compounds in the RGO sheet …”

Section: Resultsmentioning

confidence: 52%

Enhanced Supercapacitor Performance and Electromagnetic Interference Shielding Effectiveness of CuS Quantum Dots Grown on Reduced Graphene Oxide Sheets

Ghosh

Srivastava

2021

ACS Omega

View full text Add to dashboard Cite

This study is focused on the preparation of the CuS/RGO nanocomposite via the hydrothermal method using GO and Cu–DTO complex as precursors. X-ray diffraction, Fourier-transform infrared spectroscopy, and Raman and X-ray photoelectron spectroscopy study revealed the formation of the CuS/RGO nanocomposite with improved crystallinity, defective nanostructure, and the presence of the residual functional group in the RGO sheet. The morphological study displayed the transformation of CuS from nanowire to quantum dots with the incorporation of RGO. The galvanostatic charge/discharge curve showed that the CuS/RGO nanocomposite (12 wt % Cu–DTO complex) has tremendous and outperforming specific capacitance of 3058 F g–1 at 1 A g–1 current density with moderate cycling stability (∼60.3% after 1000 cycles at 10 A g–1). The as-prepared nanocomposite revealed excellent improvement in specific capacitance, cycling stability, Warburg impedance, and interfacial charge transfer resistance compared to neat CuS. The fabricated nanocomposites were also investigated for their bulk DC electrical conductivity and EMI shielding ability. It was observed that the CuS/RGO nanocomposite (9 wt % Cu–DTO) exhibited a total electromagnetic shielding efficiency of 64 dB at 2.3 GHz following absorption as a dominant shielding mechanism. Such a performance is ascribed to the presence of interconnected networks and synergistic effects.

show abstract

Section: Resultsmentioning

confidence: 52%

Enhanced Supercapacitor Performance and Electromagnetic Interference Shielding Effectiveness of CuS Quantum Dots Grown on Reduced Graphene Oxide Sheets

Ghosh

Srivastava

2021

ACS Omega

View full text Add to dashboard Cite

show abstract

“…Since cristobalite has a higher strength than fused silica, the ceramic cores with a small quantity of cristobalite show poor flexural strength. However, when the content of cristobalite is higher than 20%, the core strength decreases, this weakening is typically attributed to the microcracks caused by the phase transformation of β‐cristobalite to α‐cristobalite during cooling . Therefore, the use of additives to prevent the generation of microcracks between particles is necessary to improve the strength of silica‐based ceramic cores.…”

Section: Introductionmentioning

confidence: 99%

Silica‐based ceramic core for aviation applications: Facile pore filling and flexural strength improvement

Chen

Han

Zhang

et al. 2019

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

The effect of alumina addition on the pore filling process, crystallization behavior and mechanical properties of silica-based ceramic cores was investigated. The sintered samples at 1250°C were treated at 1550°C for 0.5 hour in order to simulate a casting process condition. The microstructure analysis indicated that an appropriate alumina addition enhanced the pore filling process by supplying a substantial liquid viscous flow. With an increase in the liquid viscous flow, smaller pores were filled first, and larger pores were filled later. The results also indicated that the pore filling process could be enhanced by adding small powder additives to decrease the pore size between the particles in the ceramic material. However, an excessive alumina addition in the silica-based ceramic cores had a negative effect on the flexural strength and leaching rate. As the alumina content increased from 8 to 12 wt%, the flexural strength of the ceramic core decreased from 16.37 to 4.60 MPa, respectively, and the leaching rate also decreased obviously. These results were explained by an acceleration in crystallization trend of the fused silica particle surface and the merging of connected pores in the sintered body. K E Y W O R D Sliquid viscous flow, mechanical properties, pore filling process, silica-based ceramic core 2182 | CHEN Et al.

show abstract

“…In Fig. 1b it is observed an overall increase in the background loss that is specifically related to scattering caused by the devitrification process (the process of crystallization in a formerly amorphous glass) [5]. It is also observed the evolution of the transmission spectrum to an irregular wavelength dependence, its origin is not fully understood, as will be discussed below.…”

Section: Resultsmentioning

confidence: 90%

“…This process is initiated at the surface of the fibre due to dust, flaws or scratches and advances towards the fibre core [11]. The crystallization rate increases in the presence of water and oxygen [5]. On the other hand, dopants such as germania also accelerate the crystallization since it decreases the viscosity and the point defects in the glass structure may act as nucleation centres leading to crystallization starting at the core and evolving to the cladding region.…”

Section: Resultsmentioning

confidence: 99%

Investigation of the long-term stability of arc-induced gratings heat treated at high temperatures

Rego

Caldas

Иванов

et al. 2011

Optics Communications

View full text Add to dashboard Cite

show abstract

Investigation of the devitrification and microwave penetrating properties of fused silica

Cited by 18 publications

References 26 publications

Enhanced Supercapacitor Performance and Electromagnetic Interference Shielding Effectiveness of CuS Quantum Dots Grown on Reduced Graphene Oxide Sheets

Enhanced Supercapacitor Performance and Electromagnetic Interference Shielding Effectiveness of CuS Quantum Dots Grown on Reduced Graphene Oxide Sheets

Silica‐based ceramic core for aviation applications: Facile pore filling and flexural strength improvement

Investigation of the long-term stability of arc-induced gratings heat treated at high temperatures

Contact Info

Product

Resources

About