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Based on the experience, selected proper materials, optimized the structure and with advanced method realized the domestic manufacture.
The tube and fixed tube plate used automatic argon arc welding in the hole, is superior to the fixed tube plate end welding structure, this welding method can solve the high temperature erosion caused by the oxidation problem of weld overheated, make the pipe thermal stress change into compressive stress, also can avoid the corrosion of tube plate and the clearance of the tube, as in [1], but it is a kind of very difficult machining and welding structure to realize.
Flexible tube plate structure can effectively improve the safety of the equipment.
The design and analysis of flexible tube plate structure is conducive to the release of thermal stress, inner hole and deep hole butt welding lap welding is an advanced structure, applicable to such specific conditions.
Progress in Chemistry, 2002,21(9):685-688 [6] Yu Su.

The Synthesis and performance study of complex of Calcium(II) and maleic amide acid Jie kanga, Kanshe Lib, Chuangqian Chenc and Runlan Zhangd Institute for Polymer Research, College of Chemistry & Chemical Engineering, Xi’an University of Science and Technology, Xi’an, Shaanxi Province, PR China 710054 akxr-2510@163.com,blikanshe@xust.edu.cn,cchuangqianchen@yahoo.com.cn, drunlanzhang@yahoo.com.cn Keywords: Complexes, Calcium maleic aniline acid salt, PVC, synthesis, performance Abstract: Complex of calcium(II) and maleic aniline acid had been synthesized based on maleic anhydride, aniline and calcium sulfate.
Some effects of combined sequence and the structure and performance has been studied, Based on experiments one kind of Calcium maleic aniline acid salt were synthesized.
First, the structure is unstable Cl from PVC started to decompose to release HCl, and the HCl catalytic decomposition of PVC[2,3].
PVC rare earth stabilizer is nearly years, a new non-toxic stabilizers development, due to rare earth elements with unique electron shell structure, and our abundant reserves, Therefore, the application prospects of rare earth in the PVC industry.

Frictional Performance of Brake Pads against Al Metal Matrix Composites with Different Sizes of SiC Particles Shaoyang Zhang and Fuping Wang Department of Applied Chemistry, Harbin Institute of Technology, Harbin 150001, China Keywords: Brake pads; Al metal matrix composites; Friction coefficient; Wear Abstract.
The minor level of friction coefficient was attributable to soft Al crystal structure characteristics and thick tribofilms during the testing stages.
Al has capability to undergo plastic deformation owing to fcc crystal structure characteristics, serving as a frictional lubricant in tribofilms.
The minor level of friction coefficient is relevant to softer lubricative Al crystal structure characteristics and thick tribofilms.

Ltd, Shanghang 364200, China 3 Centre for Advanced Materials and Industrial Chemistry, School of Applied Sciences, RMIT University, Melbourne, Vic 3001, Australia amiao.chen@csiro.au Keywords: Arsenopyrite, Bioleaching, XANES, XPS, As speciation Abstract.
The arsenic speciation and minerology changes in the residues were analysed by X-ray Absorption Near Edge Structure (XANES) Spectroscopy, X-ray Photoelectron Spectroscopy (XPS) and powder X-ray Diffraction (XRD).
Zhang, Community structure and dynamics of the free and attached microorganisms during moderately thermophilic bioleaching of chalcopyrite concentrate, Bioresour.
Nomura, Determination of the As(III)/As(V) Ratio in soil by X-ray Absorption Near-edge Structure (XANES) and its application to the arsenic distribution between soil and water, Anal.

Study on CH4 Adsorption onto the Surfaces of Perovskite ABO3 ( A=La, Ba; B=Zr, Co, Ce) by Density Functional Theory Zishu Gao1,a, Hua An2, Li Lv3,b, Lichun Hou1, Hui Han1`, Xiaojing Wang1,c,∗ 1College of Chemistry and Chemical Engineering, Inner Mongolia University, Huhehaote City 010021, P.
The absorption mechanism was derived by population and electronic states analysis on the basis of the electronic and surface structure calculations.
Thus, by changing the A- and/or B-sites ions in perovskite structures, it is most likely to deeply modify the catalytic properties by generation of oxygen vacancies, electrophilic oxygen species, stabilization, CH4 adsorption, or desorption properties.
Further calculations on the energy band structures indicate that A-site ions existed in the deeper energy regions, and the front energy level is mainly contributed by 2p levels of oxygen and 5d levels of the B-site ions.

OH- and molecules of H2O were retained inside the crystal structure.
Sodium titanates naturally prefer to form a layered intermediate structure (nanosheet-like structure).
The monoclinic crystal structure of Na2Ti6O13 generally comprises Na+ ions (in yellow) located in the interlayers between the TinO2n+1 planes; (2) The Na+ ions in the Na2Ti6O13 structure are ion-exchanged with H+ during the acid soaking & washing processes, and then the Na2Ti6O13 transforms into the H2Ti3O7 structure which is an analogous structure to Na2Ti3O7.
Yanu and Materials Chemistry Research Laboratory for their experimental support.
Bruce, Nanotubes with the TiO2-B structure, Chem.

Mg-Ni-H Hydrogen Storage System Prepared by Controlled Hydriding Combustion Synthesis Jing Liu1, a, Qian Li2, b and Kuo-Chih Chou2,3, c 1 School of Materials and Architectural Engineering, Guizhou Normal University, Guiyang, Guizhou 550001, PR China 2 Shanghai Key Laboratory of Modern Metallurgy & Materials Processing, Shanghai University, Shanghai 200072, China 3 Department of Physical Chemistry, University of Science and Technology Beijing, Beijing 100083, PR China aliujing_lynn@126.com, bshuliqian@shu.edu.cn, ckcc126@126.com Keywords: Hydrogen Storage; Controlled Hydriding Combustion Synthesis; High Magnetic Field; Hydriding Properties.
The effects of magnetic intensity on the structure, phase compositions and the hydriding/dehydriding (A/D) properties of the composite are investigated.
In the present work, the Mg-Ni hydrogen storage materials were prepared by CHCS and the structure and phase compositions of the products were investigated.
The difference in phase compositions and structures lead to the difference in the hydrogen content.

The XRD study revealed spinel phase hda a magnetite structure.
Emphasis on green chemistry with non-toxic chemical utilization and environmentally benign solvents are routiently applied.
All of the diffraction peaks can be indexed to the magnetite structure phase of iron oxide by comparison with the data from JCPDS card (77-1545) and no characteristic peaks were observed other than Fe3O4.
XRD, Raman and FTIR spectroscopy characterized the molecular structure of Fe3O4 nanoparticles.

Preparation of HfO2 Thin Film Through Self-Assembled Monolayers on Si Substrate Zheng Yu-Qina , Tan Guo-Qiang, Miao Hong-Yan b , He Zhong-Liang, Xia Ao and Bo Hai-Yang Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science and Technology, Xi'an, Shaanxi,710021, China a zhengyuqin2008520@163.com; b mhy@sust.edu.cn Keywords: Self-assembled monolayers; HfO2 thin film; Silicon substrate Abstract.
XRD, SEM and AFM images indicated that the HfO2 thin film with cubic crystal structure was smooth, uniform and dense.
The structure and phase composition were characterized by X-ray diffraction (XRD, D/max-200PC, RIGAKU, Japan) with Cu Kα radiation at a scanning speed of 4°/min.
The thin films with cubic crystal structure were smooth, uniform and dense.

This may be attributed to the layer-chain fibrous crystal structure of palygorskite and the complex physicochemical nature in friction process.
Table 1 Physicochemical property of the experimental lubricating oils Item value(SAE) Density (gcm-3) Kinematic viscosity (mm2s-1) Viscosity index Pour point(℃) Flashing point(℃) 150SN 0.863 5.43, 100℃ / 32.28, 40℃ 101 -12 202 CD15W-40 0.794 15.02, 100℃ / 110.6, 40℃ 141 -27 228 PAO40 0.842 39, 100℃ / 396, 40℃ 147 -30 280 Results and discussion The TEM images of Palys are given in Fig. 1, where, the layer-chain fibrous crystal structure of palygorskite can be clearly seen.
This may be attributed to the layer-chain fibrous crystal structure of palygorskite and the complex physicochemical nature in friction process.
[5] Chen C H..Journal of Physics and Chemistry of Solids, 2008, 69: 1411-1414.