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Online since: August 2015
Authors: Yohanes Edi Gunanto, K. Sinaga, B. Kurniawan, S. Poertadji, H. Tanaka, T. Ono, E. Steven, J.S. Brooks
The magnetic structure was determined using high-resolution neutron scattering at room temperature and low temperature.
[2] M.S.Kim, J.B.Yang, J.Medvedeva, W.B.Yelon, P.E.Paris, and W.J.James, Electronic structure of La0.7Sr0.3Mn1−xCuxO3 (0.0≤x≤0.30), J.Phys.
Malik, Structure, magnetic, and transport properties of Ti-substituted La0.7Sr0.3MnO3, Phys.Rev.B 71, (2005) 014433
[16] M.S.Kim, J.B.Yang, J.Medvedeva, W.B.Yelon, and P.E.Paris, Electronic structure of La0.7Sr0.3Mn1−xCuxO3 (0.0≤x≤0.30), J.Phys.
-G.Li, Transport and magnetic properties in La0.7Ca0.3Mn1−xCuxO3, Materials Chemistry and Physics 75, (2002) 140-143.
[2] M.S.Kim, J.B.Yang, J.Medvedeva, W.B.Yelon, P.E.Paris, and W.J.James, Electronic structure of La0.7Sr0.3Mn1−xCuxO3 (0.0≤x≤0.30), J.Phys.
Malik, Structure, magnetic, and transport properties of Ti-substituted La0.7Sr0.3MnO3, Phys.Rev.B 71, (2005) 014433
[16] M.S.Kim, J.B.Yang, J.Medvedeva, W.B.Yelon, and P.E.Paris, Electronic structure of La0.7Sr0.3Mn1−xCuxO3 (0.0≤x≤0.30), J.Phys.
-G.Li, Transport and magnetic properties in La0.7Ca0.3Mn1−xCuxO3, Materials Chemistry and Physics 75, (2002) 140-143.
Online since: November 2012
Authors: Yan Fang Guan, Li Li Han, Ming Gang Shen
The main structures of the micropump include inlet and outlet pipe, silicon substrate pump body, piezoelectric transducer.
The 3rd modal is similar to the 2nd modal because of the axis of symmetry structure, and the frequency is 100Hz higher.
This method uses the time/gas switched DIRE with fluorine plasma chemistry and it is performed in an inductively coupled plasma etching tool from Surface Technology Systems.
Fluid-structure coupling in valveless micropumps [J].
Smart materials and structures, vol 14 (2005), p. 400-405
The 3rd modal is similar to the 2nd modal because of the axis of symmetry structure, and the frequency is 100Hz higher.
This method uses the time/gas switched DIRE with fluorine plasma chemistry and it is performed in an inductively coupled plasma etching tool from Surface Technology Systems.
Fluid-structure coupling in valveless micropumps [J].
Smart materials and structures, vol 14 (2005), p. 400-405
Online since: May 2012
Authors: Li Juan Deng, Yu Rong Zhang, Wei Li Liu
The effects of Li-site substitution with Co on the electrochemical performance of LiMnPO4/C
Lijuan Deng1, a, Yurong Zhang1, b and Weili Liu1, c
1College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou, Fujian, 350108,China
alyy.2829@163.com, b rongwei@fzu.edu.cn, c498482701@qq.com
Keywords: Li-ion Battery, LiMnPO4, Electrochemical Performance, Cathode Materials, Doping
Abstract.
Powder X-ray diffraction analysis indicates that the samples are olivine-structured.
The crystal structure of the as-prepared samples was investigated using powder X-ray diffraction (XRD) on a Philips X’pert Pro diffractometer with Cu Kα radiation operating at 30 kV and 15 mA.
It was confirmed that the samples sintered at 400℃, 500℃, 600℃ were single phase with olivine structure indexed to orthorhombic Pmnb (JCPDS card number:33-0804), and no detectable second phase was found, indicating that doping a small amount of Co did not affect the structure of the crystal.
Conclusions Olivine-structured Li(1-2x)CoxMnPO4/C composite cathode materials were prepared by sol-gel method with following heat-treatment in the air.
Powder X-ray diffraction analysis indicates that the samples are olivine-structured.
The crystal structure of the as-prepared samples was investigated using powder X-ray diffraction (XRD) on a Philips X’pert Pro diffractometer with Cu Kα radiation operating at 30 kV and 15 mA.
It was confirmed that the samples sintered at 400℃, 500℃, 600℃ were single phase with olivine structure indexed to orthorhombic Pmnb (JCPDS card number:33-0804), and no detectable second phase was found, indicating that doping a small amount of Co did not affect the structure of the crystal.
Conclusions Olivine-structured Li(1-2x)CoxMnPO4/C composite cathode materials were prepared by sol-gel method with following heat-treatment in the air.
Online since: August 2012
Authors: Adriana Scoton Antonio Chinelatto, Adilson Luiz Chinelatto, Aldo Przybysz, Eleomar Lena
The density of sintered samples was measured by Archimedes method, the crystalline structure was determinate by X-ray diffraction and the grain size and microstructure were observed by SEM.
The pure zirconia has a monoclinic structure from room temperature to 1170 °C, temperature at which transforms to a tetragonal structure.
Materials with submicron grain structure can be obtained from nanometric powders.
X-ray diffraction result indicates formation of single phase of tetragonal structure in the calcined sample.
Frade, Materials Chemistry and Physics 126 (2011) 262-271.
The pure zirconia has a monoclinic structure from room temperature to 1170 °C, temperature at which transforms to a tetragonal structure.
Materials with submicron grain structure can be obtained from nanometric powders.
X-ray diffraction result indicates formation of single phase of tetragonal structure in the calcined sample.
Frade, Materials Chemistry and Physics 126 (2011) 262-271.
Online since: March 2016
Authors: S.A. Senawi, Yusoff Mohd Amin, Roslan Md Nor, H. Azhan, Nurhana Ilmira Harun, Siti Sumaiyah Sheikh Abdul Aziz, Siti Nor Hafiza Mohd Yusoff, Nunshaimah Salleh
ZnO has also been doped with Manganese (Mn) which have affected the crystal structure and surface morphology of the sample.
The contents of doping of Mn seems to have influence the crystallite structure of the ZnO as reported by other researcher [3,5,7].
It have been report that crystal structure of ZnO depends on the milling time as well [2,11].
It can be concluded that the samples were influence by Mn doped in both crystallize structure and surface morphology.
Li, Sol-gel Preparation of CNT/ZnO Nanocomposite and Its Photocatalytic Property, Chinese Journal of Chemistry. 27(7) (2009)1317–1320.
The contents of doping of Mn seems to have influence the crystallite structure of the ZnO as reported by other researcher [3,5,7].
It have been report that crystal structure of ZnO depends on the milling time as well [2,11].
It can be concluded that the samples were influence by Mn doped in both crystallize structure and surface morphology.
Li, Sol-gel Preparation of CNT/ZnO Nanocomposite and Its Photocatalytic Property, Chinese Journal of Chemistry. 27(7) (2009)1317–1320.
Online since: October 2010
Authors: Zhu Wu Jiang, Kai Kang, Xiao Ming Xu, Ya Lei Zhang, Xue Jiang Wang
Under the best preparation condition, carbon content would be highest and the pore structure would be clear.
At the same time, the experiment determined the properties and the correlation parameters of the sludge-based activated carbon by the physical and chemistry methods.
Carbon compound condensate to be non-volatile condensation carbon and form the activated carbon with advanced vesicular structure.
To a certain extent, the higher concentration the activator had, the more obvious the influence of the condensation would be, and more advanced vesicular structure and better adsorptivity the activated carbon would have.
Carbon content was highest and the pore structure was clearest under the best preparation condition.
At the same time, the experiment determined the properties and the correlation parameters of the sludge-based activated carbon by the physical and chemistry methods.
Carbon compound condensate to be non-volatile condensation carbon and form the activated carbon with advanced vesicular structure.
To a certain extent, the higher concentration the activator had, the more obvious the influence of the condensation would be, and more advanced vesicular structure and better adsorptivity the activated carbon would have.
Carbon content was highest and the pore structure was clearest under the best preparation condition.
Online since: June 2006
Authors: Jie Cai Han, Xing Hong Zhang, Bao Lin Wang, Ping Hu, Song He Meng
For the ZrB2-based composites, with the addition of SiC particles,
the excessive growth of ZrB2 materials is restricted and grain structure is refined.
In order to improve its properties, control of the processing parameters and the final microstructure are required because porosity and microstructural features such as grain size, volume, chemistry and distribution of the secondary phases are key factors in determining the performance of zirconium diboride-based ceramics.
In addition, many intragranular SiC particles were a) c) d) b)observed in ZST materials suggesting that the TiB2 improves the intragranular structure formation which is beneficial to crack branching, so the fracture toughness was further improved.
For the ZrB2-based composites, with the introduction of SiC particles, the excessive growth of ZrB2 materials is restricted and grain structure is refined.
The strength and toughness of ZS material are further improved by addition of 8vol%TiB2, which forms solid solution phase with ZrB2 matrix and promotes the formation of intragranular structure that is beneficial to crack branching.
In order to improve its properties, control of the processing parameters and the final microstructure are required because porosity and microstructural features such as grain size, volume, chemistry and distribution of the secondary phases are key factors in determining the performance of zirconium diboride-based ceramics.
In addition, many intragranular SiC particles were a) c) d) b)observed in ZST materials suggesting that the TiB2 improves the intragranular structure formation which is beneficial to crack branching, so the fracture toughness was further improved.
For the ZrB2-based composites, with the introduction of SiC particles, the excessive growth of ZrB2 materials is restricted and grain structure is refined.
The strength and toughness of ZS material are further improved by addition of 8vol%TiB2, which forms solid solution phase with ZrB2 matrix and promotes the formation of intragranular structure that is beneficial to crack branching.
Online since: January 2013
Authors: Yan Peng Jiao, Fang Min Situ, Chang Ren Zhou
To improve carboxymethylation reaction, chitosan as reactant was activated to change its morphology and compact structure.
First, the dissolution of chitosan in acidic solution was to destroy the compact crystalline structure of chitosan.
Finally, the process of freezing the precipitates and then removing water from them was to enlarge space among macromolecular chains and form a loose inner structure.
Furthermore, X-ray diffraction analysis was performed to compare the crystalline structure of chitosan before and after activation (Fig.1 (B)). 020, 100, 110 reflections of chitosan before activation (curve a in Fig.1 (B)) appeared at 9.72°, 19.8°, 21.8°, respectively [18].
Journal of American Chemistry Society Vol. 81(1959), p.1764 [17] S.
First, the dissolution of chitosan in acidic solution was to destroy the compact crystalline structure of chitosan.
Finally, the process of freezing the precipitates and then removing water from them was to enlarge space among macromolecular chains and form a loose inner structure.
Furthermore, X-ray diffraction analysis was performed to compare the crystalline structure of chitosan before and after activation (Fig.1 (B)). 020, 100, 110 reflections of chitosan before activation (curve a in Fig.1 (B)) appeared at 9.72°, 19.8°, 21.8°, respectively [18].
Journal of American Chemistry Society Vol. 81(1959), p.1764 [17] S.
Online since: January 2017
Authors: Anna A. Nazarova, Veronica V. Churilova, Svetlana D. Polishchuk
Influence of Biodrugs with Nanoparticles of Ferrum, Cobalt and Cuprum on Growth, Development, Yield and Phytohormone Status of Fodder and Red Beets
Churilova Veronica V.1,a,*, Nazarova Аnna А.1,b, Polishchuk Svetlana D.1,c
1 Ryazan State Agrotechnological University, Division of Chemistry,
Kostychev st., 1, Ryazan, 390042, Russia
ariazan2006@yandex.ru, bNanocentr-APK@yandex.ru, csvpolishuk@mail.ru
Keywords: edible roots, fodder beet, red beet; nanopowders of ferrum, cobalt, cuprum, nano-biodrugs, yield, yield structure.
We have investigated parameters of plants growth and development, the phytohormonic status of vegetating plants, the yield, its structure and chemical composition of fodder and red beets including vitamin C and carotene.
The aim of our investigation is studying the influence of biodrugs with nanoparticles of ferrum, cobalt and cuprum on plants growth and development, phytohormone status of vegetating plants, yield, yield structure and chemical composition of fodder and red beets and approbation of nanobiodrugs in the crops growing.
Yield and Yield Structure of Red Beet Roots # Variant Roots Yield, [dt/ha] Beet Top Yield, [dt/ha] Number of Roots per 10 m2 Root Average Mass, [g] 1.
Besides mass increase of roots per hectare there have been some changes in beet yield structure.
We have investigated parameters of plants growth and development, the phytohormonic status of vegetating plants, the yield, its structure and chemical composition of fodder and red beets including vitamin C and carotene.
The aim of our investigation is studying the influence of biodrugs with nanoparticles of ferrum, cobalt and cuprum on plants growth and development, phytohormone status of vegetating plants, yield, yield structure and chemical composition of fodder and red beets and approbation of nanobiodrugs in the crops growing.
Yield and Yield Structure of Red Beet Roots # Variant Roots Yield, [dt/ha] Beet Top Yield, [dt/ha] Number of Roots per 10 m2 Root Average Mass, [g] 1.
Besides mass increase of roots per hectare there have been some changes in beet yield structure.
Online since: June 2014
Authors: Julia A. Ibraeva, Darita M. Shlychkova, Olesya A. Petrochenko, Sergey A. Starsev
That reason makes them the most important component of the structures.
Cement concrete is less strong than polymer concrete, because their structure is full of micropores and capillaries.
Corrosion of concrete structures in aggressive industrial environments.
Emako- series materials for the repair of concrete and reinforced- concrete components of power- generating structures.
Journal: Material chemistry and physics.
Cement concrete is less strong than polymer concrete, because their structure is full of micropores and capillaries.
Corrosion of concrete structures in aggressive industrial environments.
Emako- series materials for the repair of concrete and reinforced- concrete components of power- generating structures.
Journal: Material chemistry and physics.