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Online since: April 2009
Authors: Zbigniew Grzesik, Monika Migdalska
Migdalskab
Department of Solid State Chemistry, Faculty of Materials Science and Ceramics,
University of Science and Technology, al.
Introduction The kinetics and mechanism of Cu2O formation as well as the defect structure and transport properties of this oxide are satisfactorily understood.
Detailed analysis of all available data strongly suggests that one of the main reasons of disagreements observed in the literature concerning the mechanism of CuO formation and the type of defect structure in this oxide result first of all from insufficient purity of the starting material as well as from different experimental procedures.
Discussion Experimental results described above enable some new conclusions to be formulated, concerning the oxidation mechanism of Cu2O to CuO, and in particular, on the defect structure and transport properties of cupric oxide.
Wagner: Progress in Solid State Chemistry Vol. 10 (1975), p. 3
Introduction The kinetics and mechanism of Cu2O formation as well as the defect structure and transport properties of this oxide are satisfactorily understood.
Detailed analysis of all available data strongly suggests that one of the main reasons of disagreements observed in the literature concerning the mechanism of CuO formation and the type of defect structure in this oxide result first of all from insufficient purity of the starting material as well as from different experimental procedures.
Discussion Experimental results described above enable some new conclusions to be formulated, concerning the oxidation mechanism of Cu2O to CuO, and in particular, on the defect structure and transport properties of cupric oxide.
Wagner: Progress in Solid State Chemistry Vol. 10 (1975), p. 3
Online since: July 2020
Authors: Brian Manning, Duane J. McCrory, Patrick M. Lenahan, Ryan J. Waskiewicz
ENDOR can often provide extremely detailed information about point defect structure and chemistry [6], [9].
Overhof, Point Defects in Semiconductors and Insulators: Determination of Atomic and Electronic Structure from Paramagnetic Hyperfine Interactions.
Electronic Structure of Donors by the Electron Nuclear Double Resonance Technique,” Phys.
Lelis, “Relationship Between the 4H-SiC / SiO 2 Interface Structure and Electronic Properties Explored by Electrically Detected Magnetic Resonance,” IEEE Trans.
King, “Defect chemistry and electronic transport in low-κ dielectrics studied with electrically detected magnetic resonance,” J.
Overhof, Point Defects in Semiconductors and Insulators: Determination of Atomic and Electronic Structure from Paramagnetic Hyperfine Interactions.
Electronic Structure of Donors by the Electron Nuclear Double Resonance Technique,” Phys.
Lelis, “Relationship Between the 4H-SiC / SiO 2 Interface Structure and Electronic Properties Explored by Electrically Detected Magnetic Resonance,” IEEE Trans.
King, “Defect chemistry and electronic transport in low-κ dielectrics studied with electrically detected magnetic resonance,” J.
Online since: August 2004
Authors: Anne Marie Huntz, Régine Molins
Depending on the nature and structure of the substrate, γ, θ or δ aluminas are observed [11].
These differences in the nucleation, structure and morphology of aluminas lead to differences in the mechanical behaviour.
Discussion Concerning the low temperature behaviour, the growth of a lamellar structure comprised of metastable aluminas is often observed on an equiaxed layer developed during the initial stage of oxidation [8, 9].Our recent results confirm the coexistence of oxides of iron and chromium before the preferential growth of alumina and the demixing of less stable oxides.
Fe-oxides seem to promote further growth of transition aluminas with a lamellar morphology, via cationic diffusion, while Cr-oxides tend to favor (due to the isomorphism of crystalline structure) α alumina at the oxide/alloy interface, controlled by anionic diffusion.
Molins, ECS, 203rd Meeting of the Electrochemical Society, Symposium on High Temperature Corrosion and Materials Chemistry, april 27-may 2, 2003 Paris
These differences in the nucleation, structure and morphology of aluminas lead to differences in the mechanical behaviour.
Discussion Concerning the low temperature behaviour, the growth of a lamellar structure comprised of metastable aluminas is often observed on an equiaxed layer developed during the initial stage of oxidation [8, 9].Our recent results confirm the coexistence of oxides of iron and chromium before the preferential growth of alumina and the demixing of less stable oxides.
Fe-oxides seem to promote further growth of transition aluminas with a lamellar morphology, via cationic diffusion, while Cr-oxides tend to favor (due to the isomorphism of crystalline structure) α alumina at the oxide/alloy interface, controlled by anionic diffusion.
Molins, ECS, 203rd Meeting of the Electrochemical Society, Symposium on High Temperature Corrosion and Materials Chemistry, april 27-may 2, 2003 Paris
Online since: September 2019
Authors: Hua Feng Li, Qing Jun Ding
Introduction
Porous material is composed of mutually penetrating or closed pores constituting a network structure, and the boundary and surface are composed of a column or a plate.
It can be seen from the figure that there appears pore structure inside the polyimide, indicating that the melamine has been dissolved in hot water, and the pore left by the dissolved melamine is the desired porosity.
Fabrication of unique porous polyimide nanoparticles using a reprecipitation method, Chemistry of materials. 19(2007)1901-1905
An investigation of physico–chemical properties of a new polyimide-silica composites, The Royal Society of Chemistry. 4(2014)46587–46594
The structure properties and tribological behavior of the ionic liquid–polyimide composite films under high vacuum environment.
It can be seen from the figure that there appears pore structure inside the polyimide, indicating that the melamine has been dissolved in hot water, and the pore left by the dissolved melamine is the desired porosity.
Fabrication of unique porous polyimide nanoparticles using a reprecipitation method, Chemistry of materials. 19(2007)1901-1905
An investigation of physico–chemical properties of a new polyimide-silica composites, The Royal Society of Chemistry. 4(2014)46587–46594
The structure properties and tribological behavior of the ionic liquid–polyimide composite films under high vacuum environment.
Online since: June 2013
Authors: Li Li Wang, Nai Xiu Ding, Yong Li, Guang Ye Liu, Pei Yan Zuo
With the help of the studies on the parameters and the correlation with each other [18], the macromolecular structure can be better understood and more properties can be utilized.
Christian Roy et al. found that the resistance of carbon black filled composites was influenced mainly by the specific surface area, the structure and the surface chemistry of carbon black [15,16,17].
Carbon black-filled PET/HDPE blends: effect of the CB structure on rheological and electric properties.
Structure and electrical properties of carbon black.
Electrical conductivity of thermal carbon blacks influence of surface chemistry.
Christian Roy et al. found that the resistance of carbon black filled composites was influenced mainly by the specific surface area, the structure and the surface chemistry of carbon black [15,16,17].
Carbon black-filled PET/HDPE blends: effect of the CB structure on rheological and electric properties.
Structure and electrical properties of carbon black.
Electrical conductivity of thermal carbon blacks influence of surface chemistry.
Online since: April 2019
Authors: Hasim Nurhafizah, Md Supar Rohani
The variation of local structure and coordination of Nd3+ ion site alters the broadening by narrowing down the luminescence band [25].
Raju, Structural and Optical Studies of Sm3+ ions Doped Niobium Borotellurite Glasses, Journal of Molecular Structure 1029 (2012) 53-59
Rama, Photoluminescence Properties of Singly doped Tm3+ and codoped Tm3+/Tb3+ ions in Tellurite Glasses, Journal of Molecular Structure 1076 (2014) 529-534
[19] Karraker D.G., Hypersensitive Transitions of Six-, Seven-, and Eight-Coordinate Neodymium, IIolmiuni, and Erbium Chelates, Inorgunic Chemistry 6(10) (1967) 1863-1868
Annapurna, Spectroscopic Properties and Concentration Effects on Luminescence Behavior of Nd3+ doped Zinc-Boro-Bismuthate Glasses, Materials Chemistry and Physics 137 (2013) 916-921
Raju, Structural and Optical Studies of Sm3+ ions Doped Niobium Borotellurite Glasses, Journal of Molecular Structure 1029 (2012) 53-59
Rama, Photoluminescence Properties of Singly doped Tm3+ and codoped Tm3+/Tb3+ ions in Tellurite Glasses, Journal of Molecular Structure 1076 (2014) 529-534
[19] Karraker D.G., Hypersensitive Transitions of Six-, Seven-, and Eight-Coordinate Neodymium, IIolmiuni, and Erbium Chelates, Inorgunic Chemistry 6(10) (1967) 1863-1868
Annapurna, Spectroscopic Properties and Concentration Effects on Luminescence Behavior of Nd3+ doped Zinc-Boro-Bismuthate Glasses, Materials Chemistry and Physics 137 (2013) 916-921
Online since: June 2011
Authors: Xin Kuan Liu, Yang Hui Xiang, Wen Bin Hu, Ping Liu, Wen Jiang Ding
The phase structure of the sediment produced during the EN plating was analyzed by X-ray diffraction (using model D/MAX-III A, which uses Cu Kα radiation, with its 40kV voltage and 60mA current).
Fig.2 shows the XRD spectrum and analysis of phase structure of the sediment.
This can be proved by the phase structure analysis of the sediment, the nickel deposited on the work-piece reduces and the stability constant of plating bath falls down.
Secondly, the particles deposited on the surface of the work piece can also act as the active center for the deposition of nickel, consequently changed the structure of coat.
IMF, 1985,63, p.74 [7] Olsen A L, Halvorsen S T, US Patent, 030305 (1981) [8] Jiang Xiaoxia: Theory and application of electroless nickel plating (National Defense Industry Press, Beijing 2000) [9] Dai Changsong, Wu Yiyong and Wang Dianlong: Plating and Environmental Protection, 1997, 17(1997), p.9 [10] Zhang Xianglin: Chemistry of chelate (High Education Press, Beijing, 1991) [11] Hu Xinguo: Proceedings of 5th national EN conference, 2000, p.1 [12] Xiang Yanghui: Study on process and mechanism of electroless nickel-plating on magnesium alloys (Shanghai Jiaotong University, Shanghai, 2001) [13] Horsthemake Helmut, Zabrocky Stanley: Metal Finishing, 10(2004), p.38 [14] Horsthemake Helmut: Metal Finishing, 1(2008), p.18 [15] Gao Jiaqiang, Hu Wenbin, Yang Guang and Shen Bin: Electroplating & Pollution Control, 22(2002), p.8 [16] Li Ning, Li Deyu, Zhai Shufang, Deng Juanli: Plating and Finishing, 23(2001), p.18 [17] Wang Guoting: Chemistry of Colloid and Surface (Chemical Industry
Fig.2 shows the XRD spectrum and analysis of phase structure of the sediment.
This can be proved by the phase structure analysis of the sediment, the nickel deposited on the work-piece reduces and the stability constant of plating bath falls down.
Secondly, the particles deposited on the surface of the work piece can also act as the active center for the deposition of nickel, consequently changed the structure of coat.
IMF, 1985,63, p.74 [7] Olsen A L, Halvorsen S T, US Patent, 030305 (1981) [8] Jiang Xiaoxia: Theory and application of electroless nickel plating (National Defense Industry Press, Beijing 2000) [9] Dai Changsong, Wu Yiyong and Wang Dianlong: Plating and Environmental Protection, 1997, 17(1997), p.9 [10] Zhang Xianglin: Chemistry of chelate (High Education Press, Beijing, 1991) [11] Hu Xinguo: Proceedings of 5th national EN conference, 2000, p.1 [12] Xiang Yanghui: Study on process and mechanism of electroless nickel-plating on magnesium alloys (Shanghai Jiaotong University, Shanghai, 2001) [13] Horsthemake Helmut, Zabrocky Stanley: Metal Finishing, 10(2004), p.38 [14] Horsthemake Helmut: Metal Finishing, 1(2008), p.18 [15] Gao Jiaqiang, Hu Wenbin, Yang Guang and Shen Bin: Electroplating & Pollution Control, 22(2002), p.8 [16] Li Ning, Li Deyu, Zhai Shufang, Deng Juanli: Plating and Finishing, 23(2001), p.18 [17] Wang Guoting: Chemistry of Colloid and Surface (Chemical Industry
Online since: January 2013
Authors: Chang Hu Xue, Dong Feng Wang, Xiang Zhao Mao, Hong Lin
Making full use of the policy of introducing high level talents from overseas and domestic well-known professors to join in our college actively, have built a teaching staff with appropriate ranks structure, degrees structure, ages structure and subjects structure in near ten years, and built some excellent teaching teams, such as teaching team of food biochemistry and teaching team of food processing and storage.
During specialty construction process, according to the subject development and teaching level, we again amended or edited specialty textbooks and reference materials of CFSE including “Seafood Safety ”, “Food Quality and Safety of Experimental Techniques”, “Food Preservation Principles and Technology” and “Food Chemistry (English )”, and other publication such as “Marine Aquatic Products of Modern Processing Technology and Quality and Safety” of “Fermented Food ”and “Fermentation of Experimental Techniques with the Program”.
Comprehensive and design experiments have been arranged currently in the experimental course in “Food Chemistry Experiment”, “Food Technology Experiment”, “Biochemistry Experiments”, “Microbiology Experiments”, “Food Testing” and “Food Security and Health Experiment”.
During specialty construction process, according to the subject development and teaching level, we again amended or edited specialty textbooks and reference materials of CFSE including “Seafood Safety ”, “Food Quality and Safety of Experimental Techniques”, “Food Preservation Principles and Technology” and “Food Chemistry (English )”, and other publication such as “Marine Aquatic Products of Modern Processing Technology and Quality and Safety” of “Fermented Food ”and “Fermentation of Experimental Techniques with the Program”.
Comprehensive and design experiments have been arranged currently in the experimental course in “Food Chemistry Experiment”, “Food Technology Experiment”, “Biochemistry Experiments”, “Microbiology Experiments”, “Food Testing” and “Food Security and Health Experiment”.
Online since: April 2015
Authors: Jian Feng, Jun Zong Feng, Yong Gang Jiang, Lin Xu
Chen Synthesis of alumina aerogels by ambient drying method and control of ther structures.
Grimblot, Chemistry of Preparation of Alumina Aerogels in Presence of a Complexing Agent, J.
Jiang, Efect of silica content on structure and properties of Al2O3-SiO2aerogeis,Chinese J.
Inoue, Surface and pore structure of alumina derived from xerogel/aerogel, J.
Minami, Precursor structure and hydrolysis– gelation process of Al(O-sec-Bu)3 modified with ethylacetoacetate, J.
Grimblot, Chemistry of Preparation of Alumina Aerogels in Presence of a Complexing Agent, J.
Jiang, Efect of silica content on structure and properties of Al2O3-SiO2aerogeis,Chinese J.
Inoue, Surface and pore structure of alumina derived from xerogel/aerogel, J.
Minami, Precursor structure and hydrolysis– gelation process of Al(O-sec-Bu)3 modified with ethylacetoacetate, J.
Online since: April 2005
Authors: Peter Greil, Frank A. Müller, Lenka Müller, Jürgen Zeschky, Tobias Fey
The cellular structure of the resulting porous bodies were controlled by
foaming parameters and filler load.
The porous bodies with tailorable structure and composition are of interest for bone tissue engineering scaffolds and orthopedic implants.
The concurrent increase of the viscosity of the polymer melt stabilized the foam structure.
Ashby: Cellular Solids: Structure and Properties (Cambridge University Press, Cambridge, U.K. 1997) [9] S.
Elliot: Structure and chemistry of the apatites and other calcium Orthophospates (Elsevier Press, Amsterdam, Netherlands 1994)
The porous bodies with tailorable structure and composition are of interest for bone tissue engineering scaffolds and orthopedic implants.
The concurrent increase of the viscosity of the polymer melt stabilized the foam structure.
Ashby: Cellular Solids: Structure and Properties (Cambridge University Press, Cambridge, U.K. 1997) [9] S.
Elliot: Structure and chemistry of the apatites and other calcium Orthophospates (Elsevier Press, Amsterdam, Netherlands 1994)