Exposure of Tantalum Carbide, Silicon Nitride and Aluminum Nitride to Chlorine Trifluoride Gas

2019 ◽  
Vol 8 (3) ◽  
pp. P175-P179 ◽  
Author(s):  
Miyu Haruguchi ◽  
Ryohei Kawasaki ◽  
Hitoshi Habuka ◽  
Yoshinao Takahashi
Keyword(s):  
Silicon Nitride ◽  
Aluminum Nitride ◽  
Tantalum Carbide

scholarly journals Growth of Aluminum Nitride on a Silicon Nitride Substrate for Hybrid Photonic Circuits

2021 ◽  
Author(s):  
Giulio Terrasanta ◽  
Manuel Müller ◽  
Timo Sommer ◽  
Stephan Gepraegs ◽  
Rudolf Gross ◽  
...  
Keyword(s):  
Silicon Nitride ◽  
Aluminum Nitride ◽  
Photonic Circuits

scholarly journals Van der Waals and Graphene-Like Layers of Silicon Nitride and Aluminum Nitride

2D Materials ◽  
2019 ◽  
Author(s):  
Vladimir G. Mansurov ◽  
Yurij G. Galitsyn ◽  
Timur V. Malin ◽  
Sergey A. Teys ◽  
Konstantin S. Zhuravlev ◽  
...  
Keyword(s):  
Silicon Nitride ◽  
Aluminum Nitride ◽  
Van Der Waals

Fabrication of Nitride Ceramics by Electric Current Assisted Sintering

2014 ◽  
Vol 616 ◽  
pp. 19-22
Author(s):  
Toshiyuki Nishimura ◽  
Naoto Hirosaki
Keyword(s):  
Silicon Nitride ◽  
Aluminum Nitride ◽  
Electric Current ◽  
Recent Trend ◽  
High Heating Rate ◽  
High Plasticity ◽  
Ceramic Powders ◽  
Fine Grained ◽  
Sintering Additive ◽  
Nitride Ceramics

Electric current assisted sintering (ECAS) has been used for sintering of nitride ceramic powders. It was mainly used for fabrication of fine-grained silicon nitride ceramics with high plasticity at high-temperatures, because high heating rate of ECAS was effective for densification without grain growth. Recent trend of silicon nitride ceramics sintered by ECAS are for wear resistance, corrosion resistance, or high toughness. Application of silicon nitride ceramics is expanding and the ECAS is helpful for improving the properties. The ECAS is used for sintering of aluminum nitride ceramics, recently. Aluminum nitride powder could be densified without sintering additive by ECAS, but some kinds of sintering additives are effective for densification and improvement of thermal conductivity.

scholarly journals Rapid Inactivation of SARS-CoV-2 by Silicon Nitride, Copper, and Aluminum Nitride

2020 ◽  
Author(s):  
Giuseppe Pezzotti ◽  
Eriko Ohgitani ◽  
Masaharu Shin-Ya ◽  
Tetsuya Adachi ◽  
Elia Marin ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Silicon Nitride ◽  
Aluminum Nitride ◽  
Copper Ion ◽  
Viral Disease ◽  
Viral Rna ◽  
Disease Spread ◽  
Rt Pcr ◽  
Viral Inactivation ◽  
Global Concern

AbstractIntroductionViral disease spread by contaminated commonly touched surfaces is a global concern. Silicon nitride, an industrial ceramic that is also used as an implant in spine surgery, has known antibacterial activity. The mechanism of antibacterial action relates to the hydrolytic release of surface disinfectants. It is hypothesized that silicon nitride can also inactivate the coronavirus SARS-CoV-2.MethodsSARS-CoV-2 virions were exposed to 15 wt.% aqueous suspensions of silicon nitride, aluminum nitride, and copper particles. The virus was titrated by the TCD50 method using VeroE6/TMPRSS2 cells, while viral RNA was evaluated by real-time RT-PCR. Immunostaining and Raman spectroscopy were used as additional probes to investigate the cellular responses to virions exposed to the respective materials.ResultsAll three tested materials showed >99% viral inactivation at one and ten minutes of exposure. Degradation of viral RNA was also observed with all materials. Immunofluorescence testing showed that silicon nitride-treated virus failed to infect VeroE6/TMPRSS2 cells without damaging them. In contrast, the copper-treated virus suspension severely damaged the cells due to copper ion toxicity. Raman spectroscopy indicated differential biochemical cellular changes due to infection and metal toxicity for two of the three materials tested.ConclusionsSilicon nitride successfully inactivated the SARS-CoV-2 in this study. The mechanism of action was the hydrolysis-mediated surface release of nitrogen-containing disinfectants. Both aluminum nitride and copper were also effective in the inactivation of the virus. However, while the former compound affected the cells, the latter compound had a cytopathic effect. Further studies are needed to validate these findings and investigate whether silicon nitride can be incorporated into personal protective equipment and commonly touched surfaces, as a strategy to discourage viral persistence and disease spread.

Hybrid Aluminum Nitride Integration on Silicon Nitride Photonic Circuits

2021 ◽  
Author(s):  
Giulio Terrasanta ◽  
Manuel Müller ◽  
Timo Sommer ◽  
Matthias Althammer ◽  
Menno Poot
Keyword(s):  
Silicon Nitride ◽  
Aluminum Nitride ◽  
Photonic Circuits

scholarly journals Efficient third-harmonic generation in composite aluminum nitride/silicon nitride microrings

Optica ◽  
2018 ◽  
Vol 5 (2) ◽  
pp. 103 ◽  
Author(s):  
Joshua B. Surya ◽  
Xiang Guo ◽  
Chang-Ling Zou ◽  
Hong X. Tang
Keyword(s):  
Silicon Nitride ◽  
Aluminum Nitride ◽  
Harmonic Generation ◽  
Third Harmonic Generation ◽  
Third Harmonic

Investigation of radiation shielding properties for some ceramics

2019 ◽  
Vol 107 (2) ◽  
pp. 179-191 ◽  
Author(s):  
Mustafa R. Kacal ◽  
Ferdi Akman ◽  
M. I. Sayyed
Keyword(s):  
Silicon Nitride ◽  
Aluminum Nitride ◽  
Yttrium Oxide ◽  
Experimental Studies ◽  
Magnesium Silicate ◽  
Radiation Shielding ◽  
Linear Attenuation Coefficient ◽  
Buildup Factor ◽  
Neutron Shielding ◽  
Effective Electron

Abstract In this work, the radiation shielding parameters like mass and linear attenuation coefficient, half value layer, tenth value layer, mean free path, effective atomic number, effective electron density, exposure buildup factor and fast neutron removal cross section were examined for the peridot, aluminum nitride, ruby, yttrium oxide, magnesium silicate, and silicon nitride ceramic samples. Furthermore, the dependence of the effective conductivity on the energy was investigated. The experimental studies were carried out in the photon energy range of 81 keV–1333 keV using a high resolution HPGe detector and six different radioactive sources. The experimental results were validated with the theoretical results and a good agreement was observed for all samples. The yttrium oxide has more shielding effectiveness for γ radiation, while magnesium silicate, aluminum nitride and silicon nitride possess least γ-ray shielding. However, the optimum neutron shielding material is ruby.

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