Search results

Introduction Kyanite, sillimanite and andalusite have the same chemical composition—Al2SiO5, while differ in crystal structure.
Advances in Chemistry Series.

Elliott, Structure and Chemistry of the Apatites and Other Calcium Orthophosphates, Elsevier, Amsterdam, London, New York, Tokyo, 1994, pp. 6-11

The wet chemistry method is usually adopted to synthesize the initial powder which is then sintered at high temperature to give HA with adequate strengths.
As the formation of an organic network structure was achieved by radical polymerization of AA monomers and further physical crosslinking via freezing-thawing cycles, the composite gel therefore has good elasticity.

Chen d, ¶ Department of Chemistry, East China Normal University, Shanghai 200062, China a ys02123063@student.ecnu.edu.cn, d qmchen@chem.ecnu.edu.cn.
The control of the colloidal particle size and monodispersity is a key in the formation of two- or three-dimensional self-assembled structures[4].

Zeolites have a porous structure that can accommodate variety of cations, such as Na+, K+, Ca2+, Mg2+ and others.
Rosencrance,The Chemistry, Crystallization, Physicochemical Properties and Behavior of Sodium Aluminosilicate Solid Phases: Final Report, WERC-MS-2002-00907(2002), p. 1-141

The crystal structure was characterized by X-ray diffractometor (XRD, RTP 300RC, Rigaku, Japan) with Cu Kα radiation.
[6] CRC Handbook of Chemistry and physics, edited by D.

Asachi” Technical University of Iaşi, Faculty of Industrial Chemistry and Environmental Protection, 71A, D.
Anion exchange resin characteristics Physical-chemical characteristics A500 Polymer structure Macroporous polystyrene crosslinked with divinylbenzene Functional group Quaternary ammonium Appearance Spherical beads Ionic form – Cl- Total Capacity (Cl- Form) (eq/L) 1,15 Moisture Retention (Cl- Form) (%) 53-58 Specific gravity 1,08 g/ml Particle diameter (mm) 1,18 The analytical method used for nitrite content determination was SR ISO 6777 – molecular spectrometric method.

AE is the term for the noise emitted by materials and structures when they are subjected to stress.
Owens (eds.), Proceedings of the 11th International Congress on the Chemistry of Cement, Durban, South Africa, 2003, pp. 1878-1888

Many of the physical and chemical properties of molten salt has a strong effect on molten salt electrolysis process, such as molten salt of the liquidus temperature, density, viscosity, solubility, basic data essential for these properties and melt structure and theory research in molten salt[5].
The ionic melt chemistry [M], Beijing: Metallurgical Industry Press, 1986: 48

Fracture of the Leads of Integrated Circuits with TO Package Xiu-yun YANG 1,a*, Ming-yu JIA 1,b, Qiao-yun SUN 1,c ，Wen-qing YAO 2,d* 1Beijing City University, No.269 Beisihuan Zhonglu, Haidian District, Beijing 100083, China 2Tsinghua University, Department of Chemistry, Haidian District, Beijing 100084, China ayangxiuyun@bcu.edu.cn, bjmy@bcu.edu.cn, csunqy@126.com, dyaowq@tsinghua.edu.cn, Keywords: failure, lead, ICs, stress corrosion cracking, Kovar alloy Abstract.
SCC-related failures were frequent in the structure materials and mechanical parts.