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Online since: August 2015
Authors: Watcharee Rattanasakulthong, Patthamapun Boonprakom
The film thickness of the ZnO:Al films estimated from the SEM results were 86, 264, 289, 309 and 332 nm and clearly indicated that the film thickness directly increased with increasing sputtering power because the higher power of bombardment gave rise to a higher number and energy of scattered atoms deposited on substrate materials.
The Al2O3 phase cannot be detected because the aluminum atoms have substantially replaced zinc in the hexagonal lattice or segregated to the non-crystalline region in the grain boundary [3].
Online since: July 2015
Authors: Kai Ji He, Kai Ming Wang, Shu Cai Wang
More and more synthetic approaches of GaN powder and crystalline grain have been proposed with study gradually on condition, simple process and equipments.There have not been sufficient theoretical analysis and explanation, although the relevant conditions on the gas-solid reaction are researched in each papers.
Further, formation of a special peak at 20° probably in the XRD pattern was caused by lattice distortion that is doped by a certain number of nitrogen atoms into the structure of Ga2O3 in the course of active state.
Online since: February 2022
Authors: E.D. Nazarova, V.Yu. Filin, I.A. Galchun
Therefore, a number of special technological measures are presented in ISO 15653.
Fig. 4 – A transverse macro section of a welded GMAW welded joint, slot-type groove The studies were performed for two presumably most critical areas of the heat affected zone (HAZ): position "fusion line" (FL) is related to grain-coarsened HAZ within 0.5 mm from fusion line, position "HAZ-II" is near the boundary of intercritically and subcritically heated HAZ regions supposing incomplete recrystallization.
Online since: March 2013
Authors: Subbaiyan Sugapriya, Rangarajalu Sriram, Sriram Lakshmi
The crystallite size of silver is calculated using Scherrer’s equation where, D is the grain size, K is a constant taken to be 0.94, λ is the wavelength of the x-ray radiation, β is the full width at half maximum and θ is the angle of diffraction.
As the reaction mixture was refluxed at ~160 °C, the number and length of these nanowires increased over a period up to ~60 minutes.
Online since: March 2012
Authors: Yu Jiao Wang, Hai Yun Lin, Hui Rong
Map Reduce divides major tasks into many fine-grained subtasks.
Multi-tenant technology Multi-tenant technology aims to enable a large number of users to share the same stack of hardware and software resources.
Online since: March 2012
Authors: N. J. M. van Leth, G.J. Verhoeckx
For the alumina layer to withstand the thermal stresses accompanying the operation of the heater, the density of the layer is closely controlled by careful selection of the right grain size distribution of the alumina powder.
The shadow mask is intended for color selection and contains a large number of small holes (typically 200 to 300 microns) in a steel substrate.
Online since: November 2016
Authors: Adel K. Mahmoud, Furat I. Hussein, Suha I. Al-Nassar
A number of tests were done for characterizing the produced ZnO NP’s, a UV-visible extinction spectrum of the colloidal solutions was recorded using a spectrophotometer type Varian Cary-50 UV-Visible with (1cm) optical path cell to study the optical absorption/transmission properties of nanoparticle-dispersed suspensions, Other analytical techniques such as (FTIR) spectroscopy (The PerkinElmer Spectrum 100 Series FTIR spectrometer) are also used to study the adsorption of organic species on the ZnO nanoparticles.
Baladi, effect of laser wavelength and ablation time on pulsed laser ablation synthesis of al nanoparticles in ethanol, 2nd International Conference on Ultrafine Grained & Nanostructured Materials UFGNSM) International Journal of Modern Physics: Conference Series Vol. 5 (2012), p.58–65
Online since: July 2018
Authors: Nittaya Jaitanong, Suparut Narksitipan, Treerat Silatikunsatid
In recent years, the increasing interest in combining photocatalytic active materials with cementitious materials has been recognized in a number of publications as well as in development of some commercial products.
They postulated that formation of the layer of zinc hydroxide on the surfaces of anhydrous cement grains isolates the cement particles from water and thus inhibits cement hydration [8-12].
Online since: June 2014
Authors: Si Wen Guo
At present, using parameters in computer communication has password, identifier, keys, random number, etc.
Access control is the most important equipment is a firewall, it usually placed at the entrance of the different security domain and the in and out of the network of IP packet filtering and information flow control in accordance with corporate security policy, at the same time realize the network address translation, real-time information audit warning function, such as advanced firewall can also achieve fine-grained access control based on users.
Online since: September 2013
Authors: Jing Min Mao, Da Feng Gao
Introduction A large number of soil and sand in the Yangtze River is frequently transported by water, then deposited and clogged in the waterway.
PCSB Curing Modified Features PCSB is a light gray powdery inorganic mixture, with a density of 3.0g/cm3, a bulk density of 1.25g/cm3, a specific surface area of 400 m2/kg, and a maximum grain size of approximately 80μm.
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