Understanding the effect of the tape surface on the metal-particle tape medium noise

2002 ◽  
Vol 91 (10) ◽  
pp. 8745 ◽  
Author(s):  
Alex Roesler ◽  
Jian-Gang Zhu
Keyword(s):  
Metal Particle ◽  
Tape Medium

Electron Microscopy of the Shape of Small Metal Particles

1977 ◽  
Vol 35 ◽  
pp. 300-301
Author(s):  
M. Jose Yacaman
Keyword(s):  
Electron Microscopy ◽  
Metal Particle ◽  
Field Experiments ◽  
Size Range ◽  
Dark Field ◽  
Metal Particles ◽  
Bragg Condition ◽  
Crystal Particle ◽  
Small Metal Particle ◽  
Small Metal Particles

In the Study of small metal particles the shape is a very Important parameter. Using electron microscopy Ino and Owaga(l) have studied the shape of twinned particles of gold. In that work electron diffraction and contrast (dark field) experiments were used to produce models of a crystal particle. In this work we report a method which can give direct information about the shape of an small metal particle in the amstrong- size range with high resolution. The diffraction pattern of a sample containing small metal particles contains in general several systematic and non- systematic reflections and a two-beam condition can not be used in practice. However a N-beam condition produces a reduced extinction distance. On the other hand if a beam is out of the bragg condition the effective extinction distance is even more reduced.

scholarly journals Thermal Analysis of PEG/Metal Particle-coated Viscose Fabric

2021 ◽  
pp. 107231
Author(s):  
Kai Yang ◽  
Jakub Wiener ◽  
Mohanapriya Venkataraman ◽  
Yuanfeng Wang ◽  
Tao Yang ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Metal Particle

Plasmonic perovskite solar cells: an overview from metal particle structure to device design

2021 ◽  
pp. 101287
Author(s):  
Peiyu Li ◽  
Xiongzhuo Jiang ◽  
Shumin Huang ◽  
Yanchun Liu ◽  
Nianqing Fu
Keyword(s):  
Solar Cells ◽  
Metal Particle ◽  
Perovskite Solar Cells ◽  
Device Design ◽  
Particle Structure

Control of Ni metal particle size in Ni/SiO2 catalysts by calcination and reduction temperatures

1987 ◽  
Vol 83 (10) ◽  
pp. 3189 ◽  
Author(s):  
Hiroyuki Tamagawa ◽  
Kyuichi Oyama ◽  
Tsuyoshi Yamaguchi ◽  
Hiroshige Tanaka ◽  
Hideyasu Tsuiki ◽  
...  
Keyword(s):  
Particle Size ◽  
Metal Particle ◽  
Metal Particle Size

scholarly journals Microfluidic Airborne Metal Particle Sensor Using Oil Microcirculation for Real-Time and Continuous Monitoring of Metal Particle Emission

Micromachines ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 825
Author(s):  
Jong-Seo Yoon ◽  
Jiwon Park ◽  
Hye-Rin Ahn ◽  
Seong-Jae Yoo ◽  
Yong-Jun Kim
Keyword(s):  
Real Time ◽  
Metal Particle ◽  
Continuous Monitoring ◽  
Metal Particles ◽  
Minimum Size ◽  
Capacitive Sensing ◽  
Test Bed ◽  
Optimal Frequency ◽  
Site Monitoring ◽  
Cost Efficient

Airborne metal particles (MPs; particle size > 10 μm) in workplaces result in a loss in production yield if not detected in time. The demand for compact and cost-efficient MP sensors to monitor airborne MP generation is increasing. However, contemporary instruments and laboratory-grade sensors exhibit certain limitations in real-time and on-site monitoring of airborne MPs. This paper presents a microfluidic MP detection chip to address these limitations. By combining the proposed system with microcirculation-based particle-to-liquid collection and a capacitive sensing method, the continuous detection of airborne MPs can be achieved. A few microfabrication processes were realized, resulting in a compact system, which can be easily replaced after contamination with a low-priced microfluidic chip. In our experiments, the frequency-dependent capacitive changes were characterized using MP (aluminum) samples (sizes ranging from 10 μm to 40 μm). Performance evaluation of the proposed system under test-bed conditions indicated that it is capable of real-time and continuous monitoring of airborne MPs (minimum size 10 μm) under an optimal frequency, with superior sensitivity and responsivity. Therefore, the proposed system can be used as an on-site MP sensor for unexpected airborne MP generation in precise manufacturing facilities where metal sources are used.

Investigating the field effectiveness of respirators against metal particle exposure in various workplaces: a systematic review

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Ata Rafiee ◽  
Imranul Laskar ◽  
Bernadette Quémerais
Keyword(s):  
Systematic Review ◽  
Metal Particle ◽  
Field Studies ◽  
Bibliographic Databases ◽  
Breathing Zone ◽  
Protection Factor ◽  
Particle Exposure ◽  
Metal Levels ◽  
Full Face ◽  
Health Impairments

Abstract Welders are exposed to high levels of metal fumes, which could be resulting in various health impairments. Respirators became a practical protective option in workplaces, as they are lightweight and easy to use. This systematic review attempts to explore the field effectiveness of using respirators to reduce metal particle exposure in workplaces. We reviewed papers published from 1900 to April 2019 in five major bibliographic databases, including Embase, Web of Science, Medline, Scopus, and CINAHL, along with organizational websites to cover gray literature. In total, 983 references were identified from the databases, out of which, 520 duplicates were removed from the EndNote database. The remaining 463 references were screened for their title and abstract. Out of 463, 70 references went through the full-text screening. Finally, eight papers, including 19 workplace respirator studies, satisfied all the inclusion criteria and were reviewed in this report. The geometric means for metal levels in workers’ breathing zone with and without respirators were 9.4 and 1,777 µg/m3 for iron, 1.1 and 139 µg/m3 for lead, 2.1 and 242 µg/m3 for zinc, and 27 and 1,398 µg/m3 for manganese oxide, respectively. Most reviewed studies reported significant differences between measured metal particle levels among workers who worn respirators and who did not. In addition, results showed that N95 provided significantly less protection than elastomeric half facepieces, full-face respirators, and powered air-purifying respirators (p<0.001). More field studies are recommended to investigate Workplace Protection Factor (WPF) and fit factor (FF) of different respirators to understand the actual protection levels that they could be provided to control welding fume exposure among welders in various workplaces.

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