Search results

Effects of Hydrothermal Treatment on the Structure and Properties of Aviation Polysulfide Sealant Meng Jiangyan1，a, Wang Yunying2，b 1.
The main chain can have two kinds of chemical structures.
Chemistry and Adhesion,2010,vol.32, no. 01: pp:9-12
Material and Structures,vol.41,(2008) pp:1473-1486
Material and Structures, Vol.41,(2008) , pp:1497-1508

The degradation process of the polymeric membranes may vary according to the molar mass, composition, thermal structure, crystalline structure and amount of applied polymer.
Dissertation (Master in Chemistry), Federal University of Ceara.
Thesis (PhD in Inorganic Chemistry), Federal University of Ceara, Fortaleza, 2008.
New Chemistry, 38 (7) (2015) 957-971.
Disponível em: chemistry.org.il/booklet/22/pdf/ilana_cohen.pdf>.

Defect structure of ZnO determines the optoelectronic characteristics of ZnO crystal and film.
It is well known that the properties of semiconductors are determined by the defect structure, which in turn is controlled by crystal structure.
At ambient conditions, the thermodynamically stable phase of ZnO is wurtzite structure.
The relative open crystal structure results in complicated intrinsic defect structure.
Kroge: Chemistry of imperfect crystals (North-Holland, Amsterdam 1974)

Reactivity Study of LaSrCoFeO3 - Ba(Ce,Zr)O3 Composite Cathode Material Nafisah Osman 1, a*, Ismariza Ismail 2,b, Abdullah Abdul Samat 2,c, Abdul Mutalib Md Jani 1,d 1Faculty of Applied Sciences, Universiti Teknologi MARA Perlis, 02600 Arau, Perlis, Malaysia 2Faculty of Applied Sciences, Universiti Teknologi MARA Perlis, 40450 Shah Alam, Selangor, Malaysia afisha@perlis.uitm.edu.my, bis_mariza@yahoo.com, cabas_chelah@yahoo.com, dabdmutalib@perlis.uitm.edu.my Keywords: Cathode, Composite, Reactivity study, Structure.
The analysis of room temperature XRD data revealed that A1, A2 and A3 samples exhibit a complete solid solution between the crystal structures of LSCF cathode and BCZY electrolyte.
For the LSCF powder, all the diffraction peaks can be assigned to single-phase of LSCF with orthorhombic structure (JCPDS 89-1268).
Osman, Role of CA-EDTA on the Synthesizing Process of Cerate-Zirconate Ceramics Electrolyte, Journal of Chemistry 2013 (2012)

Bankowa 12, 40 – 007 Katowice 2 Institute of Physical Chemistry, Johannes Gutenberg University Mainz, Jakob Welder Weg 11, 55128 Mainz, Germany amzubko@us.edu.pl, bj.wspaniala@gmail.com, cdanuta.stroz@us.edu.pl, dmugnaiol@uni-mainz.de Keywords: electron diffraction tomography, precession electron diffraction, reciprocal space mapping Abstract.
For both samples crystal structure was refined and the cubic symmetry with space group Fdm was confirmed.
The scientific goal of presented paper was to confirm the crystal structure down to the nano-areas.
The occurrence of vanadium atoms in the crystal structure of ZnCr2-xVxSe4 was confirmed.
Basic crystallographic information for studied crystal structures up to resolution of 0.8 Å.

Synthesis and Luminescence Characteristics of Mg (II) Complexes With Salicylaldehyde-henyl-sulfonylhydrazone Xi-Shi Tai 1, a 1 College of Chemistry and Chemical Engineering, Weifang University, Weifang 261061, P.R.
So magnesium plays an important role in the whole cell and acts as structures and catalysts [3].
Crystal structure determination A colourless single crystal with dimensions of 0.54 mm ×0.48 mm ×0.45 mm was selected for X-ray structure analysis.
Structure analysis The molecule structure of salicylaldehyde-henyl-sulfonylhydrazone is shown in Fig. 1.
Fig. 2 shows the zigzag structure of salicylaldehyde-henyl-sulfonylhydrazone.

Synthesis of V2O5 Powders by EDTA Assistance Ultrasound Sol-gel Process Wen Quana, Huang Jian-fengb, Cao Li-yunc and Wu Jian-pengd Key Laboratory of Auxiliary Chemistry & Technology for Light Chemical Industry, Ministry of Education, Shaanxi University of Science & Technology, Xi’an Shaanxi 710021, China a21231666@qq.com, bhuangjf@sust.edu.cn (corresponding author), ccaoliyun@sust.edu.cn, dwujianpeng@sust.edu.cn Keywords: V2O5; Sol-gel process; EDTA; Ultrasonic cavitation Abstract.
It crystallizes with an orthorhombic unit cell structure belonging to Pmnm space group with lattice parameters of a=11.510 Å, b=3.563 Å and c=4.369 Å.
It has a layer-like structure and it is built up from distorted trigonal bipyramidal coordinationpolyhedra of O atoms around V atoms, that share edges to form (V2O4)n zigzag double chains along the (001) direction and are cross linked along (100) through shared corners [2].
The vibration bands in spectra at 1018 cm-1 which is assigned to V=O stretching and at 834 cm-1 which is due to stretching vibration of V-O-V bond, the peaks at around 482 cm-1 and 607 cm-1 is assigned to stretching vibration by VO5 structure, with the increase of calcining temperatures, the original structure has been destroyed and is reflected in the stretching vibration at 524 cm-1.
Livage, Sol-gel chemistry and electrochemical properties of vanadium oxide gels, Solid State Ionics. 86-88 (1996) 935-942

Experimental Study and Thermodynamic Calculation of BaO-Lu2O3Binary System Xin-yu Ye1,2,a, Qin Li1,Yang Luo and Di Wu1,2 1School of Metallurgy and Chemistry Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China 2NationalEngineeringResearchCenter for Ionic Rare Earth, Ganzhou 341000, China axinyye@yahoo.com Keywords: BaO-Lu2O3 binary system, CALPHAD,Ionic two-sublattice model,Thermodynamics Abstract.Only one intermediate compound Ba3Lu4O9was identified at 1373, 1573 and 1773K in the BaO-Lu2O3system in present work.Based on the available experimental phase diagram and relevant thermodynamic data, BaO-Lu2O3 binary system was optimized and calculated by using CALPHAD method.
The compounds of the BaLn2O4 are found in the system of La to Er which have the structure of CaFe2O4-type and Ba3Ln4O9type are formed in the series of lanthanides from Sm to Lu with a structure of hexagonal symmetry as well as Sc and Y.Ba3Lu4O9exists in1273-2483K with an structure of medium symmetry which classified by Petrographic investigation.
As for BaO-Lu2O3binary system,theentire phase diagram has not been reported yet.In this study, the phase relationships of BaO-Lu2O3at 1373, 1573 and 1773Kwereexamined by X-ray diffraction(XRD)to identify the intermediate compound and the BaO-Yb2O3system was considered to be a reference system with a view to high similarity of structure and properties of Ybto Lu.
Russian Journal of Inorganic Chemistry, 1983,28:724-727

This compound can be viewed as a sulfate exchange product of Ln2(OH)5X·nH2O (X= Cl- or NO3-), whose crystal structure is built up via alternative stacking of the hydroxide and anion layers along the [001] direction (c-axis).
The above results are understandable from the solution chemistry of Eu3+ discussed below.
Annealing Eu2(OH)4SO4·nH2O in the air produces orthorhombic structured Eu2O2SO4 in the temperature range of 300-1000 o C (Fig. 4).
The 600-1000 °C powders can all be well indexed to hexagonal structured Eu2O2S (JCPDS No. 00-026-1418).
In Handbook on the Physics and Chemistry of Rare Earths, edited by Gschneidner K A, Jr and Eyring L R.

Multimode layered coal transportation network is a complex network structure with multiple starting point and end point, multiple lines and transportation methods and facilities
Conclusion This paper analyzes the basic concept and structure of coal transportation network, constructs a multi-mode hierarchical coal transportation network topology, and analyzes Chinese coal transportation network complexity factors which contains internal and external complexity factors.
The analysis on coal transportation network topology abstraction could help us know the structure and characteristic of China coal transportation well.
Jónsson, in: Theoretical Methods in Condencsed Phase Chemistry, edited by S.D.
Schwartz, volume 5 of Progress in Theoretical Chemistry and Physics, chapter, 10, Kluwer Academic Publishers (2000).