Results 31 to 40 of about 11,554 (146)

Updating the Role of Reduced Graphene Oxide Ink on Field Emission Devices in Synergy with Charge Transfer Materials

Nanomaterials, 2019
Hydroiodic acid (HI)-treated reduced graphene oxide (rGO) ink/conductive polymeric composites are considered as promising cold cathodes in terms of high geometrical aspect ratio and low field emission (FE) threshold devices.
Minas M. Stylianakis, George Viskadouros, Christos Polyzoidis, George Veisakis, George Kenanakis, Nikolaos Kornilios, Konstantinos Petridis, Emmanuel Kymakis   +7 more
doaj   +1 more source

Metallurgical Processing for Impregnated Thermionic Cathodes Manufacturing

Materials Research, 2022
A metallurgical process using a very high temperature Mo-Ru brazing filler alloy to join a controlled porous tungsten cathode button and a single-crystalline molybdenum cathode body for microwave tubes manufacture was developed†.
Glauco P. Zanella, Gabriel G. J. de Sousa, Cláudio C. Motta   +2 more
doaj   +1 more source

Electron emission processes in cold cathode thermal arcs [PDF]

, 1993
In this Thesis the processes of electron emission from cathode electrodes are studied theoretically, and the applicability of these mechanisms to the non refractory cathodes that can be used to sustain thermal arcs was examined.
Mollart, T.P., Mollart, T
core  

A new LED lamp for the collection of nocturnal Lepidoptera and a spectral comparison of light-trapping lamps

Nota Lepidopterologica, 2017
Most nocturnal Lepidoptera can be attracted to artificial light sources, particularly to those that emit a high proportion of ultraviolet radiation.
Gunnar Brehm
doaj   +3 more sources

Characteristics of proton exchange membrane fuel cells cold start with silica in cathode catalyst layers

, 2010
In this study, a novel strategy is reported to improve the cold start performance of proton exchange membrane (PEM) fuel cells at subzero temperatures. Hydrophilic nano-oxide such as SiO(2) is added into the catalyst layer (CL) of the cathode to increase
Shen, Qiang, Yu, Hongmei, Miao, Zhili, Shao, Zhigang, Hou, Junbo, 俞红梅, Song, Wei, Hao, Lixing, Yi, Baolian   +8 more
core   +1 more source

Cleaning a Cold Cathode Gauge Tube

, 2003
This topic appeared on the MSA list server In December 2002 and January 2003. While cleaning my gauge tube recently, I documented the steps. In this article I describe cleaning a Varian 524-2 gauge tube.
Owen P Mills
core   +1 more source

Arc root commutation from moving contacts in low voltage devices

, 2000
This paper focus on the arc commutation from a moving contact and in particular on the anode motion of a high current arc in low voltage current limiting circuit breakers.
Weaver, P.M., J.W. McBride, Pechrach, K., K. Pechrach, McBride, J.W., P.M. Weaver   +5 more
core   +1 more source

Analysis of the Failure Modes in the Polymer Electrolyte Fuel Cell Cold-Start Process—Anode Dehydration or Cathode Pore Blockage

Energies, 2020
In this study, the cold-start failure processes of a polymer electrolyte fuel cell have been investigated numerically for different initial membrane water content λ 0 and the startup current densities I 0 .
Lei Yao, Fangfang Ma, Jie Peng, Jianbo Zhang, Yangjun Zhang, Jianpeng Shi   +5 more
doaj   +1 more source

Research progress in carbon nitride in field emission cold cathode materials

Cailiao gongcheng, 2022
Carbon nitride has the advantages of excellent thermal stability, high thermal conductivity, larger forbidden band width and negative electron affinity. Therefore, carbon nitride is a promising field emission cathode material. On the basis of introducing
XIAO Haochun, FENG Yibing, WANG Jigang
doaj   +1 more source

The Cold Cathode Arc

, 1962
Many theories have been proposed in the last 15 years to explain the observed high current densities associated with the cold cathode arcs. All of these theories are somewhat inadequate in themselves, but a combination of some of the more recent theories
RH Eather
core   +1 more source