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Online since: April 2005
Authors: Lauren E. Jackson, Adrian J. Wright
Wrightb
1
School of Chemistry, University of Birmingham, Edgbaston.
Confirmation of the single phase nature of this product was achieved by Rietveld analysis of the XRPD data (see Fig. 2) which provided an excellent match (Rwp = 5.21%, Rp=3.43% and χ2=5.878) with the structure determined by Trommer et al [8], giving lattice parameters a = 7.3128(1) Å, b =8.1107(1) Å, c = 9.7527(2) Å and β = 101.239(1)°.
Von Dreele, General Structure Analysis System, Los Alamos National Laboratory, (1994) [8] J.
Confirmation of the single phase nature of this product was achieved by Rietveld analysis of the XRPD data (see Fig. 2) which provided an excellent match (Rwp = 5.21%, Rp=3.43% and χ2=5.878) with the structure determined by Trommer et al [8], giving lattice parameters a = 7.3128(1) Å, b =8.1107(1) Å, c = 9.7527(2) Å and β = 101.239(1)°.
Von Dreele, General Structure Analysis System, Los Alamos National Laboratory, (1994) [8] J.
Online since: January 2005
Authors: Chuan Qi Feng, Keli Zhang, Jutang Sun
Synthesis and electrochemical properties of nonstoichiometric spinel
phase (Li1.02Mn1.90Y0.02 O4-y F0.08) for Lithium ion battery
Chuanqi Feng1, a
, Keli Zhang
2
and Jutang Sun2
1
College of Bio-engineering, Hubei polytechnic University, Wuhan, Hubei, China, 430068
2
College of chemistry and molecular Sciences, Wuhan University, Hubei, China, 430072
a
pfcq@263.net
Keywords: Nonstoichiometric Li-Mn-spinel, Natural polymer net method, Lithium ion battery
Abstract: A nonstoichiometric spinel phase (Li1.02Mn1.90Y0.02O4-yF0.08) was synthesized using
natural polymer net method.
Besides, many efforts have been devoted to stabilize its structure by doping the metal ions such as Li+, Co 3+ , Cr3+ , Ni 2+ and so on.[1-7] In this paper we first present natural polymer net synthesis and electrochemical properties for nonstoichiometric spinel phase (Li1.02Mn1.90Y0.02O4-yF0.08 ).
The bond enthalpy of Y(Ⅲ)-O was larger than that of Mn(Ⅲ)-O, besides, with Y3+ doped in spinel, the relative content of Mn(Ⅳ) was increased, so the lattice constant of spinel phase compound was decreased and the crystal structure was stabilized.
Besides, many efforts have been devoted to stabilize its structure by doping the metal ions such as Li+, Co 3+ , Cr3+ , Ni 2+ and so on.[1-7] In this paper we first present natural polymer net synthesis and electrochemical properties for nonstoichiometric spinel phase (Li1.02Mn1.90Y0.02O4-yF0.08 ).
The bond enthalpy of Y(Ⅲ)-O was larger than that of Mn(Ⅲ)-O, besides, with Y3+ doped in spinel, the relative content of Mn(Ⅳ) was increased, so the lattice constant of spinel phase compound was decreased and the crystal structure was stabilized.
Online since: September 2013
Authors: Xiu Ying Jiang, Hong Hong Shao, Yu Ting Peng, Cheng Chen, Rui Zhai
Fatigue life improvement through surface nano-structuring of stainless steel by means of surface mechanical attrition treatment[J].
Low-temperature deposition of (110) and (101) rutile TiO2 thin films using dual cathode DC unbalanced magnetron sputtering for inducing hydroxyapatite, Materials Chemistry and Physics, 2009, 117(1):288-293 [5]R.
Journal of vacuum science and technology. 2012(02) [6]Kokubo T, Kushitani H, Sakka S, Kitsugi T, Yamamuro T, Solutions able to reproduce in vivo surface structure changes in bioactive glass-ceramic A-W3, Journal of Biomedical Materials Research, 24(6), 721(1990)
Low-temperature deposition of (110) and (101) rutile TiO2 thin films using dual cathode DC unbalanced magnetron sputtering for inducing hydroxyapatite, Materials Chemistry and Physics, 2009, 117(1):288-293 [5]R.
Journal of vacuum science and technology. 2012(02) [6]Kokubo T, Kushitani H, Sakka S, Kitsugi T, Yamamuro T, Solutions able to reproduce in vivo surface structure changes in bioactive glass-ceramic A-W3, Journal of Biomedical Materials Research, 24(6), 721(1990)
Online since: February 2007
Authors: De An Yang, Zi Yang, Weijie Hu, Yuan Yuan Li, Huan Wang
Many in vivo experiments have proved the advantages of bioceramics
with porous structure for tissue ingrowth, controlled bioactivity and bioresorbablity [4,5].
As the biodegradation speed of calcium sulphate is generally higher than that of calcium phosphate, such as hydroxyapatite and β-tricalcium phosphate, a sintered composite ceramics may exhibit higher strength and transform into porous calcium phosphate structure or change the total degradation speed in vivo.
Laborde: Materials Chemistry and Physics, Vol. 80 (2003), pp. 269.
As the biodegradation speed of calcium sulphate is generally higher than that of calcium phosphate, such as hydroxyapatite and β-tricalcium phosphate, a sintered composite ceramics may exhibit higher strength and transform into porous calcium phosphate structure or change the total degradation speed in vivo.
Laborde: Materials Chemistry and Physics, Vol. 80 (2003), pp. 269.
Online since: November 2014
Authors: Zheng Zhou Wang, Jian Wei Yang, Li Xin Wu, Dong Xian Zhuo
Combustibility and Thermal Degradation of PS/IFR/Graphene Composites
Yang Jianwei1 Zhengzhou Wang1* Lixin Wu2 Dongxian Zhuo2
1 School of Materials Science and Engineering, Tongji University, Shanghai 200092, China
2 State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Materials, Chinese Academy of Sciences, Fuzhou 350002, China
*a zwang@tongji.edu.cn
Keywords: Combustibility, Thermal Degradation, PS, IFR, Graphene, Composites.
Fig. 2a shows typical laminar structures of GNP, and the thickness of sheets is about 100 nm.
Fig. 2a shows typical laminar structures of GNP, and the thickness of sheets is about 100 nm.
Online since: May 2004
Authors: Elena Landi, Anna Tampieri, G. Falini, Norberto Roveri, Monica Sandri, Gian Carlo Celotti
Falini2
1
Institute of Science and Technology for Ceramics - CNR, via Granarolo 64, I-48018 Faenza
(RA) ITALY
2
Department of Chemistry "G.
Recently the replacement of bone tissue by graft materials and products of tissue engineering with composition, structure and biological features very similar to natural tissue is the main topic of research in biomaterials.
The new preparation technique was experimented then the composites thoroughly characterized and compared : composites showed an intimated interaction of the inorganic and proteic components which modified the apatitic phase and made its composition, morphology and structure similar to the mineral component of natural bone.
Recently the replacement of bone tissue by graft materials and products of tissue engineering with composition, structure and biological features very similar to natural tissue is the main topic of research in biomaterials.
The new preparation technique was experimented then the composites thoroughly characterized and compared : composites showed an intimated interaction of the inorganic and proteic components which modified the apatitic phase and made its composition, morphology and structure similar to the mineral component of natural bone.
Online since: March 2007
Authors: Wei Li, M.H. Zhang, K.Y. Tao, Lai Jun Wang
Taod
College of Chemistry, Nankai University, Tianjin 300071, China
a
wanglaijun@mail.tsinghua.edu.cn,
b
weili@nankai.edu.cn,
czhangmh@nankai.edu.cn ,
d
kytao@nankai.edu.cn
¶Corresponding author
Keywords: preparation; NiB amorphous alloy; catalyst; characterization
Abstract.
The amorphous structure was determined by a D/MAX-2500 X-ray diffractometer with Cu Kα radiation.
One broad peak around 2θ=45°demonstrates the typical amorphous structures.
The amorphous structure was determined by a D/MAX-2500 X-ray diffractometer with Cu Kα radiation.
One broad peak around 2θ=45°demonstrates the typical amorphous structures.
Online since: August 2013
Authors: Yi Chen, Yue Peng, Wen Yong Liu, Guang Sheng Zeng, Jun Hong Yang, Xue Hui Yan
The Effect of Various Catalyzers on Transesterification in Reactive Blending PC/PLA Blends
Yi Chen1, 2, a, Yue Peng1, Wenyong Liu1, Guangsheng Zeng1, Junhong Yang1, Xuehui Yan1
1Hunan University of Technology, Key Laboratory of New Packaging Materials and Technology, Zhuzhou Hunan 412000
2Hunan University, Institute of Polymer Research, College of Chemistry and Chemical Engineering,
Changsha 410082, P.R.China
a yiyue514@yahoo.com.cn
Keywords: PC/ PLA; Transesterification; Melt blending; Mechanical properties
Abstract.Polycarbonate/Poly(lactic acid) blends were prepared through melt blending at the present of different kinds of organotin catalyzers such as monobutyltin oxide(MBTO), di-n-butyltinoxide (DBTO), di-n-octyltin oxide(DOTO), and dibutyltin dilaurate (DBTL).
In our previous work, PC/PLA/EVA blends were prepared by melt blending with organometallic catalyst DBTO, the structure, morphology of resisting impact and mechanical properties were investigated, the results showed that adding EVA and transesterificaion of PC and EVA surely improve the brittle fracture of PC/PLA as well as the impact strength of blends [9].
SEM microphotographs of break-section of blends: (A): PC/PLA/MBTO; (B): PC/PLA/ DBTL; (C): PC/PLA/DOTO; (D): PC/PLA/DBTO(D) Mechanical Properties.The transesterificaion happened in blend should make two kinds of polymer trend to be an unique structure, which improves compatibilization of PC and PLA and advances the mechanical properties of blends.
In our previous work, PC/PLA/EVA blends were prepared by melt blending with organometallic catalyst DBTO, the structure, morphology of resisting impact and mechanical properties were investigated, the results showed that adding EVA and transesterificaion of PC and EVA surely improve the brittle fracture of PC/PLA as well as the impact strength of blends [9].
SEM microphotographs of break-section of blends: (A): PC/PLA/MBTO; (B): PC/PLA/ DBTL; (C): PC/PLA/DOTO; (D): PC/PLA/DBTO(D) Mechanical Properties.The transesterificaion happened in blend should make two kinds of polymer trend to be an unique structure, which improves compatibilization of PC and PLA and advances the mechanical properties of blends.
Online since: January 2016
Authors: Sirapat Pratontep, Sittan Charoensuwan, Pawonwan Thanakit, Darinee Sae-Tang Phromyothin, Wattanaruk Sirijarutus
As an EML, the compound ought to be considered, carefully in its properties, be able to emit light as fluorescence, it could be a conductive material, and appropriated band structure with other layer is completely achieved.
From Journal of Materials Chemistry
Controlled, Rapid deposition of structured Coatings from Micro- and a Nanoparticle Suspensions.
From Journal of Materials Chemistry
Controlled, Rapid deposition of structured Coatings from Micro- and a Nanoparticle Suspensions.