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Online since: January 2017
Authors: Ting Ting Li, Na Na Wang, Hai Feng Cheng, Wei Zu Wu, Yun Li
A series of research studies on interesting structure and properties of Fe nanomaterials, involving Fe nanowires[5,6,7], Fe nanowire arrays and multi-layer or component nanowires[8,9] have been reported.
As can be seen from the Fig.6a nanowire is an enclosure surrounded by a hollow hexagonal core-shell structure that is composed of one, two or three nanowire, As far as I know this structure has not been seen in previous the literature.
Materials Chemistry and Physics.2006, 96: 278–282
As can be seen from the Fig.6a nanowire is an enclosure surrounded by a hollow hexagonal core-shell structure that is composed of one, two or three nanowire, As far as I know this structure has not been seen in previous the literature.
Materials Chemistry and Physics.2006, 96: 278–282
Online since: August 2016
Authors: Javier Andres Muñoz Chaves, Ana Paula Rosifini Alves Claro, Ana Lucia do Amaral Escada
The thickness and structure of the oxide layer formed (amorphous or crystalline) depends on the applied potential between the electrodes and duration of anodization time.
The structure of the oxide film formed on titanium can be anatase, a mixture of anatase and rutile, or rutile [11].
In their work, different anodizing potentials (from 1V and 25V) were applied and self-organized porous structures with a diameter from 15 nm to 120 nm and length from 20 nm to 1 um were formed [13].
Schmuki: Journal of Electroanalytical Chemistry Vol. 621 (2008), p. 254
The structure of the oxide film formed on titanium can be anatase, a mixture of anatase and rutile, or rutile [11].
In their work, different anodizing potentials (from 1V and 25V) were applied and self-organized porous structures with a diameter from 15 nm to 120 nm and length from 20 nm to 1 um were formed [13].
Schmuki: Journal of Electroanalytical Chemistry Vol. 621 (2008), p. 254
Online since: June 2014
Authors: Pedro González García, Lada Domratcheva Lvova, Alejandro Gómez Sánchez, Victor López Garza, Leandro García González, Francisco Gabriel Granados Martínez, Nelly Flores Ramirez
Samples obtained at 900 °C (Fig. 3) are formed mostly of rounded particles made of carbon (as EDS analysis suggests), and it can be proposed that these particles could be some kind of carbon black structure because of the synthesis conditions, as it has been previously described by [8].
The diffractogram of the powder showed that it has a crystalline structure.
From the Scherrer equation (Eq. 1) applied to the collected XRD patterns, where LC represents the crystallite size along the c-directions of the graphite crystal structure; their application has been extended to estimate the average number of walls into the CNT by assuming that the interlayer spacing in graphite (0.335 nm) it is quite similar to the distance between the inner layers in a multiwalled CNT.
Mau: Journal of Physical Chemistry B.
The diffractogram of the powder showed that it has a crystalline structure.
From the Scherrer equation (Eq. 1) applied to the collected XRD patterns, where LC represents the crystallite size along the c-directions of the graphite crystal structure; their application has been extended to estimate the average number of walls into the CNT by assuming that the interlayer spacing in graphite (0.335 nm) it is quite similar to the distance between the inner layers in a multiwalled CNT.
Mau: Journal of Physical Chemistry B.
Online since: July 2011
Authors: Chun Xia Xu, Zhong Wen Ou, Jun Long Zhou, Han Bin Chen, Qiao Chen
Investigation on Protectional Ability on Steel Bar of Compound Corrosion Inhibitor Applied In Seawater-And-Sea Sand Concrete
Chunxia Xu1, a, Zhongwen Ou1,b, Junlong Zhou1,c, Chen Hanbin1,d,
Chen Qiao1,e
1Department of Chemistry and Materials Engineering, Logistical Engineering University of PLA, Chenjiaqiao Town Shapingba, Chongqing 401311, China
axcx1111@sina.com.cn, bouzhongwen@sina.com.cn, cjunlongz@hotmail.com, dchenhanbin@sina.com, e8384673@qq.com
Key word: seawater-and-sea-sand concrete, polarization potential, protectional ability on steel bar, corrosion inhibitor
Abstract: Seawater and sea sand mixed in concrete will cause rebar of structural concrete corrosion, referring to the principles of composition and design of MCI and Pearson’s Hard-Soft Acid-Base (HSAB) theory, as well as to synergy effect of corrosion inhibitor applied in chemical industry, compound corrosion inhibitor has been designed consisting of diisopropanolamine, surface active agent, inorganic salts and
The main design principle of MCI is as follows: ①Length and structure size of molecular chain of main film matter of corrosion inhibitor are proper; ②Molecule of corrosion inhibitor can coordinate with iron to form five or six-membered chelate ring; ③There are multiple active absorption centers in molecule; ④there are two polar groups in corrosion inhibitor molecule; ⑤there is active component which has good effect to improve and restore rebar in corrosion inhibitor; ⑥ there is component to be able to improve sealing performance of concrete in corrosion inhibitor.
[2] Neville A.Chloride Attack of Reinforced Concrete:an Overview, Materials and Structures. 28(1995) 63-70
[5] Pan Deqiang Design for Corrosion Prevention Durability of Concrete Structure in Marine Environment, Port & Waterway Engineering. 8(2001)13-14.
The main design principle of MCI is as follows: ①Length and structure size of molecular chain of main film matter of corrosion inhibitor are proper; ②Molecule of corrosion inhibitor can coordinate with iron to form five or six-membered chelate ring; ③There are multiple active absorption centers in molecule; ④there are two polar groups in corrosion inhibitor molecule; ⑤there is active component which has good effect to improve and restore rebar in corrosion inhibitor; ⑥ there is component to be able to improve sealing performance of concrete in corrosion inhibitor.
[2] Neville A.Chloride Attack of Reinforced Concrete:an Overview, Materials and Structures. 28(1995) 63-70
[5] Pan Deqiang Design for Corrosion Prevention Durability of Concrete Structure in Marine Environment, Port & Waterway Engineering. 8(2001)13-14.
Online since: March 2010
Authors: Jin Gou Ji, Xiao Yu Yuan, Zhi Ning Xia, Peng Peng Liu, Ji Da Chen
Porous β-Tricalcium Phosphate Composite Scaffold Reinforced by
K2HPO4 and Gelatin
JinGou Ji 1, a, XiaoYu Yuan
1,b
, ZhiNing Xia
1,2
, PengPeng Liu1 and JiDa Chen1
1
College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
2
College of Bioengineering, Chongqing University, Chongqing 400044, China
a
725_tiger@sina.com, byxycqu@163.com
Keywords: Porous β-tricalcium phosphate; Gelatin; Composite materials
Abstract.
Both the inside and its surface have the same structure: macro/micro pore.
The ideal porous β-TCP composite scaffold should have the macro/micro pore structure, because the macroporous is better for osteo conductivity, and the microporous is better for connectivity of scaffold inside.
This structure is conducive to the growth of bone tissue, and also has good effect on the transport of nutrient substance needed by cells growth, and the waste discharging.
Both the inside and its surface have the same structure: macro/micro pore.
The ideal porous β-TCP composite scaffold should have the macro/micro pore structure, because the macroporous is better for osteo conductivity, and the microporous is better for connectivity of scaffold inside.
This structure is conducive to the growth of bone tissue, and also has good effect on the transport of nutrient substance needed by cells growth, and the waste discharging.
Online since: February 2014
Authors: Yang Xiao, Zhen Zhang, Wei Hua Pu
Agglomeration of FePO4 Prepared by Continuous Reaction Precipitation
Yang Xiao1,2,a, Zhen Zhang1,b and Weihua Pu1,c
1 Institute of Nuclear & New Energy Technology, Tsinghua University, Beijing, China
2 College of Chemistry & Materials, South-Central University for Nationalities,Wuhan,Hubei,China
axiaoyang@tsinghua.edu.cn, bpadezhang@gmail.com, cpuwh@tsinghua.edu.cn
Keywords: agglomeration, FePO4, lithium ion battery, population balance
Abstract.
The olivine-structured lithium iron phosphate LiFePO4 (LFP) has been investigated extensively as suitable cathode material since the pioneering works of Padhi et al [1].
This amorphous structure strongly supports that the particles are agglomerates of the fine primary particles and not a simple crystal growth.
This is attributed to the dehydration of water molecules retained in amorphous particles, the phase transition occurred and transformed into crystalline phase structure, the final product became the pure crystalline phase FePO4.
The olivine-structured lithium iron phosphate LiFePO4 (LFP) has been investigated extensively as suitable cathode material since the pioneering works of Padhi et al [1].
This amorphous structure strongly supports that the particles are agglomerates of the fine primary particles and not a simple crystal growth.
This is attributed to the dehydration of water molecules retained in amorphous particles, the phase transition occurred and transformed into crystalline phase structure, the final product became the pure crystalline phase FePO4.
Online since: June 2014
Authors: Hai Jun Yang, Hui Zhen Wang, Li Zhong, Jun Qing Zhang, Yue Jia Liu
Currently, in order to prevent the silicone oil from suffering oxidative deterioration, two main techniques are adopted[2]: one is optimization of the oil’s molecular structure, and another is the using of effective antioxidants.
Fig. 1 Structure of 1,3-dioctyl-1,1,3,3-tetraphenyl-disiloxane (OPDS) Actually, it has been largely reported that a lot of antioxidants have been applied in different base oils.
The oxidants obtained above have different structures and different anti-oxidant mechanisms, which could be further used synergistically for the formulations of silicone base oils used at high temperature.
Lubricant additives chemistry and applications [M].
Fig. 1 Structure of 1,3-dioctyl-1,1,3,3-tetraphenyl-disiloxane (OPDS) Actually, it has been largely reported that a lot of antioxidants have been applied in different base oils.
The oxidants obtained above have different structures and different anti-oxidant mechanisms, which could be further used synergistically for the formulations of silicone base oils used at high temperature.
Lubricant additives chemistry and applications [M].
Online since: August 2017
Authors: Rudeerat Suntako
Many methods for synthesis of ZnO nanograins have been reported in wet chemistry such as thermal decomposition, sol-gel techniques and precipitation.
The crystalline and phase structure of the synthesized ZnO nanograins and conventional ZnO nanoparticles were studied by an X-ray diffractometer (XRD).
The crystalline structure of ZnO nanograins and the conventional ZnO are exhibited a hexagonal structure (JCPDS no.36-1451).
The crystalline and phase structure of the synthesized ZnO nanograins and conventional ZnO nanoparticles were studied by an X-ray diffractometer (XRD).
The crystalline structure of ZnO nanograins and the conventional ZnO are exhibited a hexagonal structure (JCPDS no.36-1451).
Online since: January 2018
Authors: Karel Dvořák, Marcela Fridrichová, Dominik Gazdič, Jana Mokrá
In this case, the formation has the effect of cracks threating durability, reducing strength until complete destruction of the structure [3,4].
There is therefore the internal stresses and destruction of the structure [5].
LO1408 "AdMaS UP - Advanced Materials, Structures and Technologies", supported by Ministry of Education, Youth and Sports under the „National Sustainability Programme I".
Taylor, Cement chemistry, ThomasTelford, London, 1997
There is therefore the internal stresses and destruction of the structure [5].
LO1408 "AdMaS UP - Advanced Materials, Structures and Technologies", supported by Ministry of Education, Youth and Sports under the „National Sustainability Programme I".
Taylor, Cement chemistry, ThomasTelford, London, 1997
Online since: February 2014
Authors: Ali Morsali, Vahid Safarifard
Irreversible Crystal to Crystal Transformation of Nano Lead(II) Coordination Polymer by Solid State Anion-replacement
Ali Morsali* a, Vahid Safarifard b
Department of Chemistry, Faculty of Sciences, Tarbiat Modares University, Tehran, Islamic Republic of Iran
aMorsali_a@modares.ac.ir, bv.safarifard@modares.ac.ir
Keywords: Nanostructure; Lead(II); Crystal-to-Crystal; 1H-1,2,4-triazole-3-carboxylate
Abstract.
The molecular structure of the fundamental building unit for 2 is shown in Fig. 1b.
The structures of the bulk materials for the compounds were confirmed by matching their powder X-ray diffraction patterns with those generated from the corresponding single-crystal structures (Fig. 3).
The molecular structure of the fundamental building unit for 2 is shown in Fig. 1b.
The structures of the bulk materials for the compounds were confirmed by matching their powder X-ray diffraction patterns with those generated from the corresponding single-crystal structures (Fig. 3).