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Online since: January 2008
Authors: Takanori Watari, Mitsunori Yada, Toshio Torikai, Hom Nath Luitel
Introduction Phosphor materials with long afterglow is a kind of energy storing materials that can absorb both UV and visible light from sun light and gradually release the absorbed energy in the darkness with a certain wavelength [1].
[2] Yuanhua Lin, Zilong Tang, Zhongtai Zhang: Materials Letters 51 (2001) 14-18
Grabmair, Luminescence Materials, Springer, Berlin, 1994
Kutty: Journal of Alloys and Compounds 354 (2003) 221-231
Garlick: Luminescent materials, Oxford University Press, UK, 1949, pp73
Online since: July 2012
Authors: Jiang Hong Zhang, Ying Jie Zhang
The appearance of minor sharp-pointed peak in the picture indicates that the conversion coating primarily consists of amorphous materials, with crystalline counterparts in select areas.
This coating primarily consists of amorphous materials, with crystalline materials in select areas, and is considered the compound coating composed of ZnO, CeO2, Ce2O3, Zn(OH)2, Ce(OH)3, and Ce(OH)4.
Carmezim: Applied Surface Science.
Amott and N.E.Ryan: Materials Forum.
Watkins, et al: Journal of Catalysis.
Online since: October 2010
Authors: Wen Liu, Shi Lang Xu
Although UHTCC is non-metallic materials, it exhibits a metallic-like bilinear S-N relation because the fatigue rupture of fibers, which governs this material’s failure, is similar to the fatigue rupture of metallic materials [6,7].
ACI Journal of Structures.
Journal of Wuhan University of Technology (Mateirals Science Edition), Vol. 24 (2009), p.677-683
Materials, Conc.
Journal of Materials in Civil Engineering, ASCE.
Online since: September 2015
Authors: Chang Sik Choi, B.I. Bae, Hyun Ki Choi
In order to design reinforced concrete member using steel fiber ultra high strength concrete, current structural design methods should be re-evaluated because it has significant difference in material characteristics compared with normal concrete.
For the safe design for ultra high strength concrete with steel fiber, perfect bond should be guaranteed and development length should be evaluated with specific material characteristics especially bond strength.
Material test results also were shown in Table 1.
This research was supported by Basic Science Research Program through the National Research Foundation of Korea(NRF) funded by the Ministry of Science, ICT & Future Planning(No.
V., Bond between normal strength and high strength concrete(HSC) and reinforcing bars in splices in beams, ACI Structural Journal, vol. 93, No. 3, pp. 272-280 (1998) [4] Huang, Z. & Engström, B. & Magnusson, J., Experimental investigation of the bond and anchorage behaviour of deformed bars in high strength concrete.
Online since: February 2011
Authors: Zhi Ming Du, Shuai Yang, Bao Guo Zhao, Lin Shuang Zhao
Preparation and Property of Pyrotechnical Battery Baoguo Zhaoa, Zhiming Du, Linshuang Zhaob, Shuai Yang State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, P.
Activation time is also influenced by conductivity of active materials in electrode and reaction products to some extent.
It can be stored over many years as maintenance-free in terms of electrochemical system, ignition powder and supporting materials.
Since structural and material composition is more for pyrotechnical battery, value of activation energy is difficult to obtain, and determined only by empirical formula.
References [1] Petrov YS, Shcheglov VD and Maslikhov VV: Fizika Goreniya i Vzryva Vol. 20 (1981), p. 20 [2] Prosyanyuk VV, Suvorov IS, Emel’yanov VN and Varenykh NM, CN Patent 1179018A. (1998) [3] Dem’yanenko DB and Dudyrev AS: Current Source of Pyrotechnic Electrodes (2005), p. 1-22 [4] Zhao LS, Du ZM, Han SX, Cong XM and Zhao BG: Science & Technology Review Vol. 27 (2009), p. 60-63 (In Chinese) [5] Liu ZC, Li W and Wang XF: submitted to Journal Nanjing University of Science & Technology (Natural Science) Vol. 32 (2008), p. 305-308 (In Chinese) [6] Spectrum Series of Electrical Power Source for Fuze System CN Standard WJ2633. (2004) [7] Varenykh NM, Emel’yanov VN, Prosyanyuk VV and Suvorov IS, RU Patent 2364989 C1. (2009) [8] Wang JQ: Chemical and Physical Power Source: the Power Source of Information Weapons and Equipments, edited by National Defense Industry Press, Beijing (2008) (In Chinese) [9] Chou YF, Peng KK, Huang MF, et al: A Battery Management System of Electric Scooter
Online since: March 2012
Authors: Sunand Santhanagopalan, Evan Lucas, Franco Marcano, Dennis De Sheng Meng, Anirudh Balram
Vertically aligned carbon nanotubes have been shown to have superior electrochemical properties than their randomly oriented counterparts [4-6] and have been investigated extensively as electrode materials for batteries and supercapacitors.
Acknowledgements This material is based upon work supported by the National Science Foundation under Grant No. 1130651.
Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation.
Wang, "Large-Scale Synthesis of Aligned Carbon Nanotubes," Science, vol. 274, pp. 1701-1703, December 6, 1996 1996
Liu, "A review on fundamentals and applications of electrophoretic deposition (EPD)," Progress in Materials Science, vol. 52, pp. 1-61, 2007
Online since: August 2015
Authors: Viorica Vasilache, Ion Sandu, Tiberiu Theodor Plăcintă, Otilia Mircea, Vasile Cotiugă
Materials and Techniques The study involves three silver coins named A, B and C (Fig. 1), discovered in the archaeological excavations at Moldavia and Bucovina Metropolitan Cathedral in Iasi, Romania in 2014-2015, when the excavations in the Western and South areas of the Cathedral a cemetery was discovered, with 41 graves from the XV century.
Analysis of scanning electron microscopy coupled with X-ray spectroscopy (SEM - EDX) showed type, morphology and nature of external and internal structures of the corrosion crust and the chemical composition of the alloy elements in the core of the three coins, and the microstructures taken from the ground or in contact with other materials.
Corrosion products contain elements from the contamination by other materials of the laying environment, such as the bones (Ca, P, C, and O), aluminum silicate and other microstructures of the soil (Si, Al, Ca, Mg, Ti, Cl and O).
Sandu, Study on the Conservation State of a Gilded Silver Coin from XVth Century, Discovered in Romania, International Journal of Conservation Science, 4, SI, (2013) 710-714
International Journal of Conservation Science, 3(1), (2012) 23-32
Online since: October 2013
Authors: Wei Yao Zhu, Qiang Cai, Xiao Feng Wang, Meng Jing Cao, Yu Lou, Xue Ling Zhang
Experimental Materials.
Cheng, Journal of Solid State Chemistry, 179(2006) 226-232 [7] Z.
Li, et al, Journal of Inorganic Material 21(2006) 558-564 (in Chinese) [9] W.
Pang: Molecular Sieve and Porous Materials Chemistry.
(Science press, China, 2004).
Online since: January 2013
Authors: Xiao Nan Zhang, Xin Hai Wang, Wei Lv, De Li Zhang, Zhong Xia Zhao
Pneumatic drying is a regular and efficient drying method for heat-sensitive materials.
The method is to let the heated air into the drying tube, the wet materials by way of heat convection to evaporate the water in wet materials.
Fig.1 Volume element of drying tube Taking the crushed fresh corn straw as materials, the multiple single factor test have been done at test-bed, and the drying process is not very different from other materials[6],The test results are universality.
From fig.8, with increasing the hot air mass flow, moisture content of materials at drying tube outlet decreases obviously.
The simulation and optimization of gas flow drying[J].Journal of Zhuzhou Institute of Technology.2003,17(5):56-58
Online since: September 2024
Authors: Sumari Sumari, Nazriati Nazriati, Hadi Nur, Muhammad Hafidz Ramadhan
Currently, materials that are often used for supercapacitor electrode materials are carbon-based materials, conductive polymers, and transition metal oxides.
Transition metal oxide materials such as MnO2 are widely used in supercapacitor electrode materials due to their high specific capacitance (1370 F g-1), ideal capacitor charge-discharge curves, abundant raw materials, and environmental friendliness [4].
Zhao, Carbon-based materials as supercapacitor electrodes, Chem.
Asian Journal of Pharmaceutics (AJP). 11 (2017) 65-74
Kar, Handbook of Nanocomposite Supercapacitor Materials II -Performance, Springer Series in Materials Science. 302 (2020) 145–175