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Online since: June 2010
Authors: Yasuhiro Hoshiyama, Tsutomu Miyazaki, Hidekazu Miyake
Production of Stainless Cast Iron Base Deposits with Dispersed Titanium Carbide Particles by Plasma Spraying Yasuhiro Hoshiyama1, a, Tsutomu Miyazaki, b, Hidekazu Miyake1, c 1 Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University, 3-3-35 Yamate-cho, Suita, Osaka 564-8680, JAPAN a hosiyama@kansai-u.ac.jp, bk051595@edu.kansai-u.ac.jp, cmiyake@kansai-u.ac.jp Keywords: Rapid solidification, titanium carbide, plasma spraying, stainless cast iron, precipitate Abstract.
In the present work, Fe-C-Ti-Cr-Ni alloy powder was low-pressure plasma sprayed to produce rapidly solidified stainless cast iron base deposits containing finely dispersed titanium carbide particles, and the structures and mechanical properties of the deposits were examined.
The as-sprayed deposit produced on a water-cooled substrate had a lamellar structure arising from successive impingement and spreading of the sprayed droplets.
Online since: September 2013
Authors: C.M. Mardziah, Nik Roseley Nik Roselina, Azizan Aziz, A. Kalam, Nor Hayati Saad, Z. Salleh, Koay Mei Hyie
In this work, crystallographic structure and crystallite size of precipitated as-synthesized products were identified by X-ray powder diffraction analysis carried out with Bruker (XRD) D8 Advanced using Cu-Kα (λ = 0.154021 nm) radiation in the angle range 2θ = 20˚ - 80˚.
Pure Ni nanopartices with FCC crystallite structure were prepared with or without NaOH.
Chemistry of Materials. 17 (2005) 1017-1026 [8] F.J.
Jeyadevan, Journal of Solid State Chemistry. 180 (2007) 3008-3018.
Online since: October 2011
Authors: Zhen Chen, Jun He, Jing Zhang, Zhi Rong Zhu
The preparation of Hybrid Solid Acids and its catalytic performance Zhen Chen 1, a, Jing Zhang1, Jun He1, Zhirong Zhu 2,b 1Department of Chemistry, Tongji university, Shanghai 200092, People’s Republic of China 2 Department of Chemistry, Tongji university, Shanghai 200092, People’s Republic of China azhenchen_1987@yahoo.com.cn, bzhuzhirong@tongji.edu.cn Keywords: Hybrid, MCM-41, Activated Carbon, Resin Solid Acid Abstract.
Because of the low acidity and catalystic activity, many studies have been conducted to discover ordered mesoporous materials with high activity site, as well as hybrid inorganic/organic structures.
Hybrid MCM-41 type products reported thus far have been inorganic structures with surfaces modified with organic functional groups [10,11] and organic functional groups in the wall by co-condensation[12].
Online since: July 2012
Authors: Zu Guang Liu, Wei Zeng, Tai Shun Zhang, Shuo Wang, Hua Long Zhu, Fu Hou Lei
Cationic Polymerization of β-Pinene Using Keggin Phosphotungstates as Catalysts Zuguang Liu 1,2,a, Wei Zeng 1,2, Taishun Zhang 1,2, Shuo Wang 1,2, Hualong Zhu1,2 and Fuhou Lei 1,2 1 College of Chemistry and Chemical Engineering, Guangxi University for Nationalities, 530008 Nanning, China 2 Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, 530008 Nanning, China a e-mail:liuzug@163.com; Tel: +86 155777142428 Fax:+86 771 3264166 Keywords: Phosphotungstate; Cationic polymerization; β-Pinene Abstract.
This indicates that the phosphotungstates still keep Keggin structure.
FT-IR shows that these phosphotungstates still keep the Keggin structure.
Online since: November 2013
Authors: Xiao Jun Ma, Dong Na Li
For using sterilization technologies to achieve sterilization, high temperature or ultra-high pressure treatment may alter the performance or structure of food packaging materials, which is bound to affect the quality of the food safety andshelf life.
This is because the structure of the internal pore of WACF prepared in this experiment is mainly micropore (<2 nm), while the size of the TiO2 microcrystal particles of the sol is generally greater than that of the ACFs, so it is difficult that the TiO2 particles enter into the internal part of pore, having to loading on the surface of WACFs, even if the dip-coating time is extended after the adsorption saturation, there is no significant change in the loading rate [7].
References [1] Tetsuto Nakashima, Yoshihisa Ohko, Yoshinobu Kubota, Akira Fujishima: Journal of Photochemistry and Photobiology A: Chemistry, Vol. 160 (2003), p. 115-120
[7] Mohamed Ksibi, Asma Zemzemi, Rachid Boukchina: Journal of Photochemistry and Photobiology A: Chemistry, Vol. 159 (2003), p. 61-70.
Online since: June 2009
Authors: Mototsugu Sakai, Yusuke Daiko, Atsunori Matsuda, Hiroyuki Muto, Tomohisa Kambayashi
Electrophoretic Deposition and Photocatalytic Activity of Titanate Nanosheets Tomohisa Kambayashi 1 , Yusuke Daiko2 , Hiroyuki Muto1 , Mototsugu Sakai 1 and Atsunori Matsuda1* 1 Department of Materials Science, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku, Toyohashi, Aichi 441-8580, Japan Tel: 0532-44-6799 Fax: 0532-48-5833 2 Department of Materials Science and Chemistry, University of Hyogo, 2167 Syosya, Himeji, Hyogo 671-2201, Japan Tel: 079-267-4722 Fax: 079-267-4722 *Corresponding author E-mail: matsuda@tutms.tut.ac.jp Keywords: Titanate nanosheet, Electrophoretic deposition, Photocatalytic activity Abstract Titanate nanosheet thick films were prepared on indium-tin oxide (ITO)-coated glass substrates by electrophoretic deposition.
The titanate nanosheet has a characteristic two-dimensional structure, in general, approximately several tens of micrometers in width but a few nanometer in thickness.
It demonstrated that by using sol A larger amounts of titanate nanosheets were deposited on the substrate and formed a thicker structure compared with the prepared film by using sols B or C.
References [1] Huogen Yu, Jiaguo Yu, Bei Cheng and Jun Lin, "Synthesis, characterization and photocatalytic activity of mesoporous titania nanorod/titanate nanotube composites", Journal of Hazardous Materials, 147, 1-2, (2007) p581-587 [2] Yu Lin, "Photocatalytic activity of TiO2 nanowire arrays", Materials Letters, 62, 8-9 (2008) p1246-1248 [3] Ryuhei Yoshida, Yoshikazu Suzuki, and Susumu Yoshikawa, "Syntheses of TiO2(B) nanowires and TiO2 anatase nanowires by hydrothermal and post-heat treatments", Journal of Solid State Chemistry, 178, 7, (2005) p2179-2185 [4] Jin-Ming Wu, Bing Huang, Min Wang and Akiyoshi Osaka, "Titania Nanoflowers with High Photocatalytic Activity", Journal of the American Ceramic Society, 89, 8, (2006) p2660-2663 ● H2Ti4O9 ・ 10 20 30 40 CuKα 2θ [°] Intensity (a.u.)
Online since: September 2018
Authors: Mikhail V. Tutov, Elizaveta I. Karpova, Eduard Tokar', Andrey M. Egorin, Alexander Yuryevich Mironenko
., Vladivostok 690950, Russia 2Institute of Chemistry Far Eastern Branch of the Russian Academy of Sciences, 159, prosp.100-letiya Vladivostoka, Vladivostok 690022, Russia a*thunderbird87@mail.ru, blishen123@mail.ru, calmironenko@gmail.com, dd.edd@mail.ru, eandrey.egorin@gmail.com Keywords: sorption materials, sol-gel process, cesium, strontium Abstract.
From the point of view of supramolecular chemistry, such compound is a podand ligand and can have the ability to form coordination centers for metal cations.
According to SEM and elemental analysis of the surface of dried gels with increasing content of TEOS, a change in the surface composition occurs: 1) at a molar ratio of 50:50 reagents, the maximum content of sulfur atoms is observed, which indicates the preferential localization of thiooxyethylene fragments on the surface of the sol particles, and siloxane fragments form them internal structure (Fig. 1e, Table 1); 2) at a 40:60 (TEOSTPE / TEOS) ratio, an increased sulfur atom content is also observed, but smaller compared to the 50/50 sample, which is naturally in agreement with an increase in TEOS concentration (Fig. 1f, Table 1); 3) however, at 30:70 and 20:70 there is a sharp drop in the concentration of sulfur atoms and an increase in the concentration of silicon and oxygen atoms, which is explained by the inversion of the sol particles during their formation and the entry of organic radicals into the interior of the sol particles (Fig. 1g, 1h, Table 1).
In order to create spatial limitations in the synthesis process that will allow us to control the structure of the resulting gel, we decided to use inorganic ionic and colloidal templates, such as cesium cations, to coordinate the molecules of the original monomer, and colloidal silica particles (Ludox AS 40) to control the formation of sol particles during the hydrolysis stage and initial condensation due to the presence of active silanol groups on the surface of the colloidal silica particles. 3.2.1.
Online since: September 2011
Authors: Shu Gan Li, Xiao Ning Jiao, Qing Long Jia
Introduction Polyimide (called PI) fiber [1,2] is a new type of special functional fiber which is developed by CAS Changchun Institute of Applied Chemistry and the Institute of Provincial Textile Industry Design.
PI fiber (51mm, 2.2dtex) which is supplied by Changchun Institute of Applied Chemistry; anti-static agent; XFH opening machine; carding machine; YBG311 pre- needling machine and YBG314 main needle machine.
We can see the structure of cone calorimeter[5]in fig. 1.
(1) working stage; (2) sample; (3) ignitor; (4) cone heater; (5) exhaust path; (6) dust sample tube; (7) collecting the temperature and pressure difference; (8) laser beam photometer; (9) air blower; (10) dust sample filter; (11) flow rate controller; (12) gas gathering; (13) amplified image Fig. 1 The basic structure of cone calorimeter Results and Discussion Ignition Time.
Online since: May 2011
Authors: Su Ying Wu, Ping Wang
Preliminary Study on Fresh Storage of Orange with Tourmaline SuYing Wu 1, a, Ping Wang 2,b 1School of Material and Chemistry Engineering Jiangxi University of Science and Technology Ganzhou Jiangxi, China 2School of Material and Chemistry Engineering Jiangxi University of Science and Technology Ganzhou Jiangxi, China a3113110580@sina.com, bwangp520@sina.com Keywords: tourmaline; navel orange; weightlessness rate;rot rate Abstract.
Introduction Tourmaline is a general term of tourmaline group minerals,which is silicate minerals with ring structure characterized by Boron,it including Aluminum, sodium, iron, magnesium, lithium.
Structure, Properties and Applications of Tourmaline [J].
Online since: October 2011
Authors: Ji Min Xie, Jun Liu, Xiao Jun Wei, Ping Li Wang
Hydrolysis and hydrolysis pathways of composite of copper (II) and cypermethrin Pingli Wang1, a, Jimin Xie1, b, Jun Liu2, c, Xiaojun Wei1, d 1School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, P.
From the structural formula of CPM, the structure of CPM was similar to carboxylic acid ester for which ester hydrolysis and cyano hydrolysis in alkaline solutions were easy to occur [8].
Copper ion had strong ability on coordination because of its electronic structure.
In addition, oxygen atom linked with carbonyl and nitrogen atom in cyanogroup in CPM molecule also had electronegativity through quantum chemistry calculation so a Cu2+ and a CPM molecules could form a five-membered ring complex.