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Online since: November 2011
Authors: Yan Wu, An Ning Zhou, Fu Sheng Yang
Study on Ultra-fine Grinding and In-situ Modification of Taixi Super-low-ash Anthracite Anning Zhou1,a, Yan Wu 1,b and Fusheng Yang1,c 1School of Chemistry and Chemical Engineering, Xi’an University of Science and Technology, Xi’an 710054, P.R.China azhouanning2004@yahoo.com.cn, bpabuwuyan@163.com, c fushengyang@163.com Keywords: Ultra-fine Grinding, In-situ Modification, Stirred Mill Abstract.
The surface morphology and dispersion of the powder were detected by scanning electron microscopy (SEM), and surface structure of the modified powder was measured by Fourier transformation infrared (FTIR).
Surface structure of the modified powder was measured by Bruker EQUINOX55 FTIR (Germany).
Online since: September 2008
Authors: Peder Bergman, Erik Janzén, Anne Henry
Peder Bergman 1,2,b and Erik Janzén1,c 1 Departement of Physics, Chemistry and Biology, Linköping University, SE-58183 Linköping, Sweden 2 also Norstel AB, Ramshällsvägen 15, S-60116 Norrköping, Sweden a ahy@ifm.liu.se, bped@ifm.liu.se, cerj@ifm.liu.se Keywords: titanium, isoelectronic bound-exciton, time-resolved photoluminescence.
The main no-phonon line of each family is shown as a triplet and its phonon structure contains both sharp and broad replicas.
In addition a sharp line located at about 90 meV from the X1 is observed (as A190) followed by a broad structure which could comport 4 or 5 broad lines (spreading between 92 2700 2750 2800 2850 2900 Photon Energy (meV) PL Intensity (a.u.) 2K 5K 10K 20K 40K 60K 80K 100K 125K B1⊥c a) 4H-SiC A3,4⊥c A5,6⊥c A0 A1//c A2⊥c B2⊥c 2700 2750 2800 2850 2900 Photon Energy (meV) 5K 10K 20K 40K 60K 80K C1⊥c A1//c B1//c C2⊥c B2⊥c A2⊥cA3,4⊥c A0 B0 b) 6H-SiC Fig.2: PL spectra recorded at the indicated temperatures for the a) 4H and b) 6H polytype, respectively.
Online since: April 2019
Authors: Roman E. Gladyshevskii, Yaroslav O. Tokaychuk, Svitlana Pukas, Natalia Semuso
New Quaternary Compounds R3MnAl3Ge2 (R – Rare Earth) Natalia Semusoa, Svitlana Pukasb, Yaroslav Tokaychukc, and Roman Gladyshevskiid Department of Inorganic Chemistry, Ivan Franko National University of Lviv, Kyryla i Mefodiya St. 6, 79005 Lviv, Ukraine anataliya.semuso@lnu.edu.ua, bsvitlana.pukas@lnu.edu.ua, ctokaychuk@mail.lviv.ua, droman.gladyshevskii@lnu.edu.ua Keywords: rare-earth metals, manganese, quaternary alumogermanides, X-ray powder diffraction, crystal structure Abstract.
The structure drawings were made with the program ATOMS [19].
Quaternary compounds reported with Y3NiAl3Ge2-type structures.
New structure types, Acta Crystallogr. 1 (1948) 265-268
Gladyshevskii, Crystal structure of the Lu3Ga5Co compound, Coll.
Online since: October 2007
Authors: Takayuki Ohba
Those native and thermal oxides show Cu2O coordination observed by XANES (X-ray Absorption Near Edge Structure) method.
This suggests that Cu oxide formed at low temperatures consists of stoichiometric Cu2O in an amorphous structure.
In order to ensure cleaning chemistry, the surface characteristics of Cu oxide are essential.
However, the stoichiometry and structure of very thin Cu oxide are unrevealed due to measurement difficulties.
Thus, Cu oxide formed at low temperatures consists of Cu2O stoichiometrically suggesting in an amorphous structure.
Online since: July 2012
Authors: Ben Guo Liu, Xin Jun Wei, Yong Sheng Zhang
This method damages meat organizational structure and properties least.
The components were identified by their mass spectra with those in the National Institute of Standards and Technology (NIST) mass spectral database (NIST Libraries and Structures version 2005).
Verzera: Food Chemistry Vol. 101(3) 2007,p.1272 [5] M.
Online since: June 2018
Authors: Kaj Grönlund, Gunilla Runnsjö
The dendritic structure is shown with good resolution.
Good resolution of dendritic pattern Columnar crystal structure at bottom, centre line segregation at about y = 13 - 15 mm.
CETAS Conference on Progress of Analytical Chemistry, Luxembourg (2002) [3] S.
Online since: May 2013
Authors: Tao He
Since the surface structure of a crystalline material varies with surface orientation, we expect the rate constant to be a function of n.
The second step is to clarify the structure and complexity of the competition between physical mechanisms using graph theory.
Klabunde: Chemistry—A European Journal, Vol.8 (2002), p.3991
Online since: January 1992
In the last fifteen years it has become more and more evident that there exist numerous examples in physical, chemical. biological and engineering systems where spatial. temporal. or spatial-temporal structures arise out of chaotic states.
These phenomena occur in systems in which there is an exchange of energy and matter with the an environment, and these structures develop spontaneously and are self-organizing.
A review of some experimental results tn radiation physics of semiconductors shows that the processes of disordering, defects evolution, transformations of defect-Impurity subsystem of Irradiated semiconductors, transitions to a new states, for example amorphizatton, have a similar nature as other non-equilibrium systems in biology, chemistry. electronics, etc.
Online since: January 2012
Authors: Li Hua Wang
Introduction During the past two decades, considerable attention has been paid to the chemistry of aroylhydrazones and their complexes with metal ions [1-3].
The structure of ligand is listed in Fig. 1.
Fig. 1 The structure of ligand Synthesis of Zn (II) complex 5 m mol of 1, 4-bis(2’-formylphenyl)-1,4-dioxabutane isonicotinoylhydrazone and 5 m mol Zn(OAc)2·4H2O were added to 10 mL ethanol, the mixture heated at 283 K in a Teflon-lined stainless steel autoclave for 5 h.
Online since: April 2009
Authors: Kenong Xia, Ji Zhang
It is reasonable if referring to HCP structure α columnar crystal usually grows from the plates' both surfaces and preferably along its [0001] direction [4].
The γ/α lamellae and thereafter γ/α2 lamellar structure are generated during the cooling process through the γ plates precipitating on the (0001)α habit plane of the α columnar crystal, which is vertical to the growing direction of the α crystal. [5].
-C. and Bouix J. (2001) An overview of monolithic titanium aluminides based on Ti3Al and TiAl, Materials Chemistry and Physics 72, 301-319 [7] Zhong Z., Zhang J., Li S. and Zou D. (1999) Microstructure Modifications of Wrought and Cast TiAl alloys, Trans.