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Online since: May 2004
Authors: Didier Bernache-Assollant, P.J. Panteix, I. Julien, P. Abélard
Synthesis and Characterisation of Oxide Ions Conductors with the
Apatite Structure for Intermediate Temperature SOFC
P.J.
The major phase of all samples was the hexagonal apatite structure.
Journal of Materials Chemistry 11 (2001), p. 1978 [3] Sansom, J.
Journal of Solid State Chemistry 139 (1998): 304309
Journal of Solid State Chemistry 5 (1972), p. 266 [8] N.A.
The major phase of all samples was the hexagonal apatite structure.
Journal of Materials Chemistry 11 (2001), p. 1978 [3] Sansom, J.
Journal of Solid State Chemistry 139 (1998): 304309
Journal of Solid State Chemistry 5 (1972), p. 266 [8] N.A.
Online since: October 2014
Authors: Chang Bo Lu, You Jie Zhou, Feng Wang, Feng Chun Liu, Gang Wang, Zhi Jia Hu, Fa Zheng
The Core System Design for New Kilowatt Aluminum-air Battery
Youjie Zhou 1, a, Changbo Lu1,b , Fa Zheng2,c, Zhijia Hu1,d ,
Feng Wang3,e , Gang Wang3,f , Fengchun Liu4,g
1Beijing POL Research Institute, Beijing, 102300, China
2 Dantu Hi-Tech Industrail Park, Zhenjiang, 212143, China
3 Beijing Martial Delegate Agency, Beijing, 100042, China
4 China North Engine Research Institute, Datong, 037036, China
azhoujie_76@163.com, bluchangbo@163.com, cemail: zhengfa@jspowerinc.com, dzhoujie778623413@163.com, eshangmachangcun@163.com, fwang20403201@163.com, g15835382882@139.com
Key Words: aluminum-air battery; fuel cell ; battery management system
Abstract: The author puts forward the core system design scheme of kilowatt aluminum-air battery on the basis of its chemistry characteristics and calculated function parameters of cell stack, and introduces the component functions, including control design, functional electrolyte circulation, air transport, DC / AC inverter system and other
Single Cell Design.There are three-layered structures of air electrode.
The traditional metal-air cell is use of a stack structure of the bipolar plate.
The overall battery module design Conclusion According to the aluminum-air battery chemistry characteristics the aluminum-air battery management core system is designed.
Single Cell Design.There are three-layered structures of air electrode.
The traditional metal-air cell is use of a stack structure of the bipolar plate.
The overall battery module design Conclusion According to the aluminum-air battery chemistry characteristics the aluminum-air battery management core system is designed.
Online since: January 2010
Authors: Yan Ding, Qing Guo Tang, Jun Ping Meng, Xu Hong Zhang, Li Juan Wang
The ion migration rules and its effect on the crystal structure of water scale were studied.
The volume of spherical crystal was smaller than calcite crystal with soft-like cluster structure.
This loose structure is easy to form water residue and precipitate in water.
Xiang: The Q&A and the useful datas in industral water treatment (Chemistry Industry Press, Beijin2000) [5] J.S.
Cao: Electrochemical Corrosion Theory (Chemistry Industry Press, Beijin2004) [9] Y.J.
The volume of spherical crystal was smaller than calcite crystal with soft-like cluster structure.
This loose structure is easy to form water residue and precipitate in water.
Xiang: The Q&A and the useful datas in industral water treatment (Chemistry Industry Press, Beijin2000) [5] J.S.
Cao: Electrochemical Corrosion Theory (Chemistry Industry Press, Beijin2004) [9] Y.J.
Online since: July 2015
Authors: Kazuhiko Hara, Mariia V. Keskinova, Konstantin A. Ogurtsov, Maxim M. Sychov, Elena V. Kolobkova, Igor A. Turkin, Yoichiro Nakanishi
Tian, The composition, luminescence, and structure of Sr8[Si4O12]Cl8, Material Research Bulletin, 36 (2001) 2051-2057
Tolstoy, Heterogeneous structure of the spectra of ions Eu2 + and Ce3 + in silica glass, Russian Journal of Glass Physics and Chemistry, 8 (1982) 216-221
Elerts, The spectra of the recombination luminescence of Eu2 + and Ce3 + in glass, Russian Journal of Glass Physics and Chemistry, 10 (1984) 478-482
Tolstoy, The effectiveness of the emission of ions Eu2 + and Ce3 + in silica glass, Russian Journal of Glass Physics and Chemistry, 8 (1982) 223-228
Poelman, Structure and luminescence of (Ca,Sr)2SiS4:Eu2+ phosphors, Journal of Physics D: Applied Physics 43, 8 (2010) 85401-85417
Tolstoy, Heterogeneous structure of the spectra of ions Eu2 + and Ce3 + in silica glass, Russian Journal of Glass Physics and Chemistry, 8 (1982) 216-221
Elerts, The spectra of the recombination luminescence of Eu2 + and Ce3 + in glass, Russian Journal of Glass Physics and Chemistry, 10 (1984) 478-482
Tolstoy, The effectiveness of the emission of ions Eu2 + and Ce3 + in silica glass, Russian Journal of Glass Physics and Chemistry, 8 (1982) 223-228
Poelman, Structure and luminescence of (Ca,Sr)2SiS4:Eu2+ phosphors, Journal of Physics D: Applied Physics 43, 8 (2010) 85401-85417
Online since: September 2013
Authors: Chun Xia Gong, Oluwatosin Emmanued Bankole, Li Xu Lei
Experimental techniques
X-ray diffraction (XRD) (D/MAX2200, Cu Ka radiation, λ=1.54178Å) was employed to analyze the structure of the samples with a scanning rate of 10°×min-1.
Results and discussion XRD and structure Fig 1 shows the XRD patterns of samples.
All the observed diffraction peaks in each of the patterns are consistent with LiNi1/3Co1/3Mn1/3O2 of α-NaFeO2 layered structure with a space group of R-3m.
Makimura, Chemistry Letters. 2001, 642-643
Sun, Materials Chemistry and Physics. 95 (2006) 218-221
Results and discussion XRD and structure Fig 1 shows the XRD patterns of samples.
All the observed diffraction peaks in each of the patterns are consistent with LiNi1/3Co1/3Mn1/3O2 of α-NaFeO2 layered structure with a space group of R-3m.
Makimura, Chemistry Letters. 2001, 642-643
Sun, Materials Chemistry and Physics. 95 (2006) 218-221
Online since: June 2012
Authors: Jin He Jiang
The structure of compound metal oxide LiMnTi0.25O3 crystallized at 800℃ was much perfect.
As shown, the structure of LiMnTi-800(H) is nearly constant, which is inverse spinel oxide type too.
J.Chinese Journal of Applied Chemistry. 2000,17(3),307-311 [3] Sui Lian Luo, Wei Shan Li, Shi Zhou Qiu, et al.
LiMn2O4 doped elements on the structure and properties [J].
Journal of Physics and Chemistry of Solids , 2007, 68: 780-784.
As shown, the structure of LiMnTi-800(H) is nearly constant, which is inverse spinel oxide type too.
J.Chinese Journal of Applied Chemistry. 2000,17(3),307-311 [3] Sui Lian Luo, Wei Shan Li, Shi Zhou Qiu, et al.
LiMn2O4 doped elements on the structure and properties [J].
Journal of Physics and Chemistry of Solids , 2007, 68: 780-784.
Online since: September 2020
Authors: Lkhagvajav Sarantuya, Galsan Sevjidsuren, Pagvajav Altantsog, Namsrai Tsogbadrakh
We consider the carrier and transition metal doping effect on structure and electronic structure of spinel LTO.
Therefore, Li4Ti5O12 structure can be denoted as [Li]8a[Li1/3Ti5/3]16d[O4]32e [10].
Atomistic structure and ab initio electrochemical properties of Li4Ti5O12 defect spinel for Li ion batteries, Journal of Material Chemistry A 2 (2014) 1589
Lee, Novel synthesis of high performance anode materials for Lithium-ion batteries (LIBs), Journal of Material Chemistry A 2 (2014) 1589
Massarottu, et al., Cr and Ni Doping on Li4Ti5O12: Cation Distribution and Functional Properties, Journal of Physical Chemistry C 113(45) (2009) 19664-19671
Therefore, Li4Ti5O12 structure can be denoted as [Li]8a[Li1/3Ti5/3]16d[O4]32e [10].
Atomistic structure and ab initio electrochemical properties of Li4Ti5O12 defect spinel for Li ion batteries, Journal of Material Chemistry A 2 (2014) 1589
Lee, Novel synthesis of high performance anode materials for Lithium-ion batteries (LIBs), Journal of Material Chemistry A 2 (2014) 1589
Massarottu, et al., Cr and Ni Doping on Li4Ti5O12: Cation Distribution and Functional Properties, Journal of Physical Chemistry C 113(45) (2009) 19664-19671
Online since: February 2014
Authors: Erik Janzén, Jawad Hassan, Louise Lilja, J. Peder Bergman
Previously, optimization of surface morphology on 2˚ off-cut substrates has been conducted with chloride based chemistry, either with trichlorosilane as Si source [3] or using standard chemistry with HCl addition [4].
This study aims to demonstrate that a smooth epilayer surface together with low surface defect density can be achieved also with standard chemistry CVD growth.
Silane and propane (SiH4 and C3H8) chemistry in hydrogen (H2) carrier gas were utilized for the growth of 4.5 to 9 µm thick epilayers, with a growth rate of 9 μm/h.
The epilayer surface roughness and step structure was studied by atomic force microscopy (AFM).
Comparing the different in-situ etching chemistries with constant C/Si ratio, pure H2 etching conditions are preferable to reduce triangular defect densities.
This study aims to demonstrate that a smooth epilayer surface together with low surface defect density can be achieved also with standard chemistry CVD growth.
Silane and propane (SiH4 and C3H8) chemistry in hydrogen (H2) carrier gas were utilized for the growth of 4.5 to 9 µm thick epilayers, with a growth rate of 9 μm/h.
The epilayer surface roughness and step structure was studied by atomic force microscopy (AFM).
Comparing the different in-situ etching chemistries with constant C/Si ratio, pure H2 etching conditions are preferable to reduce triangular defect densities.
Online since: April 2007
Authors: Wen Yan Sheng, Ying Yuan Zhang, An Ze Shui, Xiao Su Cheng, Xiu Yan Li, Ling Ke Zeng, Yong Zhao Wang, Yue Wang, Ze Hao Liu
Experimental
Chinese bauxite was used as starting materials in this experiment, its chemistry composition is shown
in Table 1.
Table 1 Chemistry composition of the bauxite (wt%) Chemistry composition Al2O3 SiO2 Fe2O3 K2O Na2O TiO2 I.L.
Structure and composition of ceramic microspheres.
Fig.3 XRD patterns of ceramic microsphere. •: α−Al2O3; ∆: Mullite Table 2 Chemistry compositions of ceramic microsphere (wt%) Chemistry composition Al2O3 SiO2 Fe2O3 K2O Na2O TiO2 Content 71.18 23.88 1.83 0.1 1.21 1.90 Table 2 show that Al2O3 content of the ceramic microsphere is little more than 70%, and the molar ratio of Al2O3/ SiO2 of microsphere is near to that of mullite.
Table 1 Chemistry composition of the bauxite (wt%) Chemistry composition Al2O3 SiO2 Fe2O3 K2O Na2O TiO2 I.L.
Structure and composition of ceramic microspheres.
Fig.3 XRD patterns of ceramic microsphere. •: α−Al2O3; ∆: Mullite Table 2 Chemistry compositions of ceramic microsphere (wt%) Chemistry composition Al2O3 SiO2 Fe2O3 K2O Na2O TiO2 Content 71.18 23.88 1.83 0.1 1.21 1.90 Table 2 show that Al2O3 content of the ceramic microsphere is little more than 70%, and the molar ratio of Al2O3/ SiO2 of microsphere is near to that of mullite.
Online since: December 2013
Authors: Darya Victorovna Kravtsova, Mihail G. Bruyako, Larisa Stsnislavovna Grigoryeva
Variable density cellular concrete
Bruyako Mihail Gerasimovich1, a, Grigoryeva Larisa Stsnislavovna2,b
and Kravtsova Darya Victorovna3,c *
1 Doctor of Technical Sciences, The Department of composite materials and applied chemistry, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation
2 Doctor of Technical Sciences, The Department of composite materials and applied chemistry, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation
3 Postgraduate student, The Department of composite materials and applied chemistry, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation
a mbruyako@yandex.ru, b ph@mgsu.ru, c avrora-br@mail.ru
Keywords: variable density, cellular concrete, aerocrete, foam concrete
Abstract: There is mentioned some methods of creation variable density cellular concrete, offered original technique
There are some methods of mechanical influence upon a foam concrete grout to create a variable dencity structure (f. ex. vibration or “scratching”) which are based on degassing of local area to form a layer with less porosity and consequently higher density.
As the result we have proposed the technique to make small-pieces units with the variable density structure in a closable mould with perforated horizontal or vertical sides.
It can leads to appearance of different defects in material’s structure and consequently it will decrease performance properties (strength, insulating properties, etc.).
When using perforated moulds and the creation of overpressure inside the mould the removal of excess water takes place during the stage of structure formation.
There are some methods of mechanical influence upon a foam concrete grout to create a variable dencity structure (f. ex. vibration or “scratching”) which are based on degassing of local area to form a layer with less porosity and consequently higher density.
As the result we have proposed the technique to make small-pieces units with the variable density structure in a closable mould with perforated horizontal or vertical sides.
It can leads to appearance of different defects in material’s structure and consequently it will decrease performance properties (strength, insulating properties, etc.).
When using perforated moulds and the creation of overpressure inside the mould the removal of excess water takes place during the stage of structure formation.