Search Options

Sort by:

Sort search results by

Publication Type:

Publication Type filter

Open access:

Publication Date:

Periodicals:

Periodicals filter

Search results

Online since: October 2010
Authors: V.V. Mitic, V.B. Pavlovic, L. Kocic, V. Paunovic, L. Zivkovic
The presented results, indicate that fractal method for ceramics structure analysis provides a new approach for describing, predicting and modeling the grain shape and relations between the BaTiO3-ceramic structure and dielectrical properties.
Since donor and acceptor type additions are basic components of dielectric materials based on BaTiO3, extensive studies have been carried out on their effect on the defect structure and related properties of BaTiO3 [7,8].
As a result, the change of grain boundary contacts, barrier structure and domain motion occurs.
Since, both, intergranular structure and electrical properties, depends on ceramics diffusion process, it is essential to have an equivalent cirquit model that provides a more realistic represantation of the electrical properties.
N.H.Chan, D.M.Smyth, Defect chemistry of donor-doped BaTiO3.
Online since: April 2014
Authors: Ioannis Kartswnakis, E. Statharas, P. Tserotas
Introduction Associating of the properties and structure is essential in the design of materials for engineering applications [1-3], which is crucial in a magnetic sensor designing and developing [4-7].
This confirmation revealed the spinel structure of the synthesized nanoparticles, which were identified to correspond in Fe3O4.
Furthermore, SAED analysis confirmed the face-centered cubic spinel structure of magnetite.
Hristoforou, Cyclodextrin inclusion complexes as novel MOCVD precursors for potential cobalt oxide deposition, Applied Organometallic Chemistry, 24, p. 112-121, 2010 [13] ND Papadopoulos, E.
Hristoforou, Effects of MOCVD thin cobalt films' structure and surface characteristics on their magnetic behavior, Chemical Vapor Deposition, 17, p. 211-220, 2011
Online since: January 2013
Authors: Xin Feng Guo, Lan Li Chen, Ming Ji Shi, Shuang Li, Shu Juan Ding
The possible growth mechanism of these structures is also discussed.
Figure1(b) demonstrates the SEM image of sample B and reveals that formed structures are composed of sheet-like morphology in high density.
The ionic and polar structure of ZnO can be described as hexagonal close packing of oxygen and zinc atoms.
The concentration of the solution plays an important role on the structure of the product.
Chinese Journal of Inorganic Chemistry.
Online since: May 2012
Authors: Jie Zhang, Gang Chen, Yan Sun, Ying Tang
Wax Precipitation Research of Crude Oil by Differential Scanning Calorimeter Jie Zhang*, Yan Sun, Ying Tang, Gang Chen College of Chemistry and Chemical Engineering, Xi’an Shiyou University, Xi’an, 710065, China Email: zhangjie@xsyu.edu.cn Keywords: Waxy crude, DSC, WAT Abstract.
The thermal curve of wax sample is relatively sharp when wax content ranged from 14%~16%, which suggested that the stable spatial structure of wax crystals formed during cooling process by changing crystal from α structure to β structure, which is a relatively stable network structure for wax crystal.
However, when the wax content in kerosene solution less than 14%, the exothermic change is slow, which indicating no crystal structure transformation happened during the cooling process at low wax concentration.
In fact, the average crystallization heat has good correlation with the composition and structure of paraffin in wax crude oil, such as the carbon number and branch degree.
To the wax sample with same structure the crystallization temperature is increase with the carbon number for the easy formation of net space.
Online since: June 2013
Authors: Jian Bin Zhang, Jian Gang Jia, Dong Mei Yu
They published "Quasicrystals: A New Class of Ordered Structures" in Phys.
Shechtman, an Israeli scientist, won Nobel Prize in Chemistry for "the discovery of quasicrystal" in 2011.
The hidden mathematical laws in the quasicrystals According to a number of studies currently, quasicrystals were found to have magical mathematical laws that three concepts related with the quasicrystals were Penrose puzzles [3], Fibonacci sequence and golden section. 1) Penrose puzzles in crystal structure A typical quasicrystal structure is three-dimensional Penrose puzzles like the mode of paving bricks with translational asymmetry, long-range ordered structure, and five rotational symmetry not allowed in common crystals (refer with: Fig. 2) [4].
Quasicrystals: A New Class of Ordered Structures [J].
Quasicrystals: An Introduction to Structure, Physical Properties, and Applications (Springer: Berlin, 2004) [6] Information on http://www.technioniit.com/2011/10/quasicrystals-shectmanite-future.html
Online since: January 2022
Authors: Jonah Chukwuemeka Agunwamba, Emmanuel Ikechukwu Ugwu
Environmental Chemistry Letters, 2, 165–168
Food Chemistry, 104:997–1005
E-Journal of Chemistry, 9(2), 938–948
Journal of Electroanalitical Chemistry. https:// doi.org/10.1016/j.jelechem.2018.05.08
M., Plavnik, G.M and Zaverina, E.D. (1964) Integrated Study of the Porous Structure of Activated Carbon from Carbonized Sucrose.
Online since: December 2023
Authors: Jian Wei Zhao, Li Rong Qin, Bi Wu, Yuan Ji Xiang
NiMn-P nanosheets were coated on CoP nanowires to form a hierarchical structure.
The morphology, structure, and surface chemistry of the composites were analyzed through scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS), respectively.
These results indicate the presence of an amorphous structure in the NiMn-OH nanosheets.
The large number of diffraction spots in the SAED pattern indicated a crystalline structure.
Chand, Supercapacitor and electrochemical techniques: A brief review, Results in Chemistry 5 (2023), 100885
Online since: March 2014
Authors: Yen Pei Fu, Jian Jhih Chen
The thin film structure is Hexagonal structure, which is determined by X-ray diffraction spectrometer (XRD) analysis.
Introduction Undoped ZnO, which has hexagonal wurtzite structure, is a kind of II-VI group N-type semiconductor material.
Structure anlaysis.
ZnO films prepared by chemical bath deposition at room temperature are wurtzite hexagonal structure.
Growth of ZnO thin films—experiment and theory, Journal of Materials Chemistry 15 (2005) 139–148
Online since: December 2013
Authors: Li Jie Wang, Jie Yang, Xiang Yun Deng, Jian Shao, Yang Shan Sun, Xing Gang Hou
XRD indicates that the samples have excellent crystallization and perovskite structure.
Structure and performance characterization of the samples.
Figure 2 shows a comparison of XRD patterns recorded for as-formed amorphous structure with annealed at 400℃ for 3h .The as-prepared TiO2 nanotubes arrays have an amorphous structure [28].
The samples have excellent crystallization and perovskite structure.
Chemistry Letters, Vol. 36 (2007) No.12 [22] M.M.
Online since: January 2010
Authors: Sheng Bao Wang, Zhen Huang, Jun Feng Su
Melamine formaldehyde resin (MF) double-shell structure microcapsules were fabricated and the mechanical properties of shell were investigated.
The mechanical properties of shell were evaluated through observing the surface morphological structure change after pressure by means of scanning electron microscopy (SEM).
The shell material was pre-polymer of melamine-formaldehyde of which solid content was 50±2%, obtained from Shanghai JQ chemistry Co. of China.
The samples were added pressure slowly and were brought out to get morphological structures at different times, so as to obtain the progress of deformation.
The mechanical strength of microPCMs had been improved with double shell structure, which would make the core stating longer in shells.