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Online since: February 2015
Authors: Ivan Nagorny, Anatolii Mirochnik, Alexander Shishov, Polina Zhikhareva, Michail Babiy, Roman Romashko
., 5, Vladivostok, 690041, Russia
3Institute of Chemistry, FEB RAS, Stoletia Vladivostokaave., 159, Vladivostok, 690022, Russia
angrn@mail.ru, bmirochnik@ich.dvo.ru, cromashko@iacp.dvo.ru
Keywords: Triboluminescence, Triboluminophores, Europium, Terbium
Abstract.
Therefore study of interrelation of internal structure of rare-earth elements complexes with their TBL properties are a very important task [23-25].
Bourhill: Smart Materials and Structures.
Therefore study of interrelation of internal structure of rare-earth elements complexes with their TBL properties are a very important task [23-25].
Bourhill: Smart Materials and Structures.
Online since: April 2010
Authors: Fen Wang, Jian Feng Zhu, Bo Bo Liu, Ya Ling Li
Synthesis of Ti3SiC2 Machinable Ceramics by High-Energy Milling
and Hot-Pressing
Liu Bo-boa, Wang Fen, Zhu Jian-feng and Li Ya-ling
Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry, Ministry of Education,
Shaanxi University of Science and Technology, Xi'an, Shaanxi, 710021, China
a
yupiner2003@163.com
Keywords: Ti3SiC2; High-energy milling; Hot-pressing; Reaction process
Abstract.
As the temperatures reach 1300°C, the grains size grown ideally, especially, the layer structure is very outstanding.
As the temperatures continue rise to 1350°C, the layer structure disappears gradually, it show that the grain grows abnormity, while many interspace appear between the interfaces.
As the temperatures reach 1300°C, the grains size grown ideally, especially, the layer structure is very outstanding.
As the temperatures continue rise to 1350°C, the layer structure disappears gradually, it show that the grain grows abnormity, while many interspace appear between the interfaces.
Online since: March 2010
Authors: Jiang Tao Li, Ying Chun Shan, Chun Long Guan, Jiu Jun Xu
Preparation and Properties of Translucent Y-α-Sialon Ceramics by
Two-Steps Hot Pressing
Shan Yingchun1,a, Xu Jiujun1,b, Guan Chunlong2 and Li Jiangtao3
1
Department of Materials Science and Engineering, Dalian Maritime University, Dalian 116026, China
2
School of Materials Science and Engineering, Henan University of Technology, Henan 450007, China
3
Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, China
a
shanychun@126.com, bjjxu@dlmu.edu.cn
Keywords: α-sialon; Two-steps hot pressing; Microstructure; Optical property
Abstract.
The two major phases of sialon are α-sialon (Mm/3Si12-(m+n)Alm+nOnN16-n, where M, the stabilizer of α-sialon structure, is the cations such as calcium, magnesium, yttrium, and rare-earth elements) and β-sialon (Si6-zAlzOzN8-z), which are isostructural with α-Si3N4 and β-Si3N4, respectively.
In addition, a stabilizer can be incorporate into α-sialon structure, together with the substitution of aluminum and oxygen for part of the silicon and nitrogen, resulting in ceramics with reduced amounts of residual glassy phase, and which is benefit to the high temperature properties of sialon [5].
The two major phases of sialon are α-sialon (Mm/3Si12-(m+n)Alm+nOnN16-n, where M, the stabilizer of α-sialon structure, is the cations such as calcium, magnesium, yttrium, and rare-earth elements) and β-sialon (Si6-zAlzOzN8-z), which are isostructural with α-Si3N4 and β-Si3N4, respectively.
In addition, a stabilizer can be incorporate into α-sialon structure, together with the substitution of aluminum and oxygen for part of the silicon and nitrogen, resulting in ceramics with reduced amounts of residual glassy phase, and which is benefit to the high temperature properties of sialon [5].
Online since: July 2012
Authors: Chang Qing Fang, Zeng Ping Zhang, Shuan Fa Chen, Jian Zhong Pei
Introduction
Cyanate ester resins (CEs) are an important kind of high-temperature thermosetting polymers, monomer of which contains two or more cyanate ester goups (-OCN) and is cured to be crosslinked network structure after the triazine polymerization [1].
POSS-Ep monomers are cage-like nano-structured particles with hard cores.
Hamerton: Chemistry and Technology of Cyanate Ester Resins (Blackie Academic & Professional, Glasgow, London, 1994)
POSS-Ep monomers are cage-like nano-structured particles with hard cores.
Hamerton: Chemistry and Technology of Cyanate Ester Resins (Blackie Academic & Professional, Glasgow, London, 1994)
Online since: April 2011
Authors: Liga Berzina-Cimdina, Kristine Salma, Dmitrijs Jakovlevs, Natalija Borodajenko, Zilgma Irbe
Introduction
The development of biphasic calcium phosphate (BCP) bioactive ceramics for bone implants involves control of the process of biomaterial resorption and structure.
Bioactivity of BCP bioceramics varies with phase composition and surface structure – chemistry and morphology are critical factors for osteoinductivity – bone formation ability in non-bone-forming sites [3,4].
Bioactivity of BCP bioceramics varies with phase composition and surface structure – chemistry and morphology are critical factors for osteoinductivity – bone formation ability in non-bone-forming sites [3,4].
Online since: March 2007
Authors: Dun Liang Jian, Dong Mei Gao, Qiu Ming Gao
At the
same time it is still a challenge to develop new methods for band gap tuning under environmental
benign conditions and using facile manipulation techniques in the field of material and chemistry.
The HRTEM analyses indicated that the CdS-VSB-5 structure was consisted of well-ordered hexagonal packed channels with diameters of about 1.2 nm.
The differences between their host-guest combination forces, the structures and compositions from the nickel phosphate VSB-5 channels and aluminosilicate zeolite Y cages may be the other reasons that the CdS-VSB-5 samples exhibit such a larger absorption blue shift.
The HRTEM analyses indicated that the CdS-VSB-5 structure was consisted of well-ordered hexagonal packed channels with diameters of about 1.2 nm.
The differences between their host-guest combination forces, the structures and compositions from the nickel phosphate VSB-5 channels and aluminosilicate zeolite Y cages may be the other reasons that the CdS-VSB-5 samples exhibit such a larger absorption blue shift.
Online since: May 2011
Authors: Yue Zhang, Jun Gang Gao, Dan Peng Ma
The Preparation Of (E)-Resveratrol Nanoemulsion And In Vitro Release
Yue Zhang1,2,a, Jungang Gao*1,b, Danpeng Ma2,c
1College of Chemistry and Enviromental Science, Hebei University, Baoding 071002, China
2School of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
ayuezhang02@163.com, bgaojg@hbu.edu.cn, c19870224dandan@163.com
Key words: nanoemulsion, (E)-resveratrol, pseudo ternary phase diagram, in vitro release
Abstract.
Experimental details (E)-Resveratrol was purchased from Xi’an Sino-Herb Bio-Technology Co.LTD (purity 99%), whose molecular structure was shown in Fig.1.
Fig. 1 Structure of (E)-resveratrol Fig. 2 Solubility of (E)-resveratrol in various components Pure (E)-resveratrol was dissolved in cosurfactant, by adding surfactant and oil to this mixture, the combination was mixed in a magnetic mixer for 15 min at 30 oC.
Experimental details (E)-Resveratrol was purchased from Xi’an Sino-Herb Bio-Technology Co.LTD (purity 99%), whose molecular structure was shown in Fig.1.
Fig. 1 Structure of (E)-resveratrol Fig. 2 Solubility of (E)-resveratrol in various components Pure (E)-resveratrol was dissolved in cosurfactant, by adding surfactant and oil to this mixture, the combination was mixed in a magnetic mixer for 15 min at 30 oC.
Online since: July 2011
Authors: Dong Wan Seo, Whan Gi Kim, Md. Monirul Islam, Young Don Lim, Soon Ho Lee, Hyun Mi Jin, Ho Hyoun Jang
Monirul Islamd,
Hyun-Mi Jine, Ho-Hyoun Jangf, Whan Gi Kimg*
Department of Applied Chemistry, Kon-Kuk University, Chungju-si, Chungbuk 380-701, Korea
as0673231@konkuk.ac.kr, bzephyrc1@konkuk.ac.kr, cmonir_acct@yahoo.com, dloveknotsh@kku.ac.kr, e01191153456@hanmail.net, ffigfight@hanmail.net, g*wgkim@kku.ac.kr.
Most of the chemical structure of polymer membranes had sulfonic acid groups directly attach on aromatic rings.
Figure 1. 1H NMR of PES, NO2-PES, NH2-PES, IPES, and SIPES Chemical structures of the sulfonated imide-poly(ethersulfone) were identified by 1H NMR, as shown in Figure 1.
Most of the chemical structure of polymer membranes had sulfonic acid groups directly attach on aromatic rings.
Figure 1. 1H NMR of PES, NO2-PES, NH2-PES, IPES, and SIPES Chemical structures of the sulfonated imide-poly(ethersulfone) were identified by 1H NMR, as shown in Figure 1.
Online since: May 2011
Authors: Yan Gang He, Xiao Wei Gan, Wei Hong, Yi Hu, Yu Ling Liu
Hence, acidic slurries with BTA for Cu CMP process can not meet more advanced nodes than 45nm, therefore, in addition to reducing the down pressure of CMP, a careful design to increase chemistry performance of alkaline slurry, with favorable complexing agents, is necessary to support efficient, chemically dominant CMP of Cu in interconnect structure containing low k dielectrics.
Part 1 Part 2 Part 3 Copper Multilayer Interconnection Wafer Fig.1 The damascene Structure of Cu Pattern Wafer for Part1, Part2 and Part3 Fig.2 Cross sectional View of Cu Pattern Wafer Table 1 The formation of Cu Alkaline Slurry Cu Alkaline Slurry (ml) DI water (ml) H2O2 (ml) pH Cu1 100 194.4 8.7 10.46 Cu2 200 94.4 8.7 10.56 Results and discussion Mechanism analysis for alkaline slurry on Cu CMP Process There is obviously different mechanism between alkaline and acidic slurry.
Part 1 Part 2 Part 3 Copper Multilayer Interconnection Wafer Fig.1 The damascene Structure of Cu Pattern Wafer for Part1, Part2 and Part3 Fig.2 Cross sectional View of Cu Pattern Wafer Table 1 The formation of Cu Alkaline Slurry Cu Alkaline Slurry (ml) DI water (ml) H2O2 (ml) pH Cu1 100 194.4 8.7 10.46 Cu2 200 94.4 8.7 10.56 Results and discussion Mechanism analysis for alkaline slurry on Cu CMP Process There is obviously different mechanism between alkaline and acidic slurry.
Online since: November 2011
Authors: Chun Hu Li, Liang Wang, Ying Wei Luo, Jian Peng Zhu
Resin:a kind of novel material used for oxidative desulfurization of diesel fuel
Yingwei Luo1, a, Chunhu Li2,b , Jianpeng Zhu3,c and Liang Wang4,d
College of Chemistry and Chemical Engineering, Ocean University of China,Qingdao,China.
Performance parameters of different resins Number Structure Fuction group Exchange-capacity (a)[mmol/g](D) (b)[mmol/ml](W) moisture content[%] Main uses 001*7 Styrene-DVB –SO-3 (a)≥4.5 (b)≥1.8 46-52 preparation of pure water,hydrometallurgy D001-cc Styrene-DVB –SO-3 (a)≥4.1 (b)≥1.6 42-55 Organocatalysis,Biologically extracted D072 Styrene-DVB –SO-3 (a)≥4.4 (b)≥1.4 45 -55 Organocatalysis,water treatment D061 Styrene-DVB –SO-3 (a)≥4.2 (b)≥1.4 44-54 food industry,water treatment NKC-9 dry hydrogen Styrene-DVB –SO-3 (a)≥4.7 (b)≥1.5 ≤10 Organocatalysis Fig 1.The sulfur removal of 001*7resin in Fig 2.
Fig 1-5 show that different types of resin have different characteristics.For the pure resins,adsorption is the main desulfurization method and the physisorption predominates.So when the temperature was too high or too low,the sulfur removal was unobvious.The reason is that in low temperature physisorption was weak but in high temperature desorption took the chief role.In most cases,50℃-60℃ was appropriate.Because of the structures and moisture contents were not exactly the same,five different types of resins had their own optimal conditions.
Performance parameters of different resins Number Structure Fuction group Exchange-capacity (a)[mmol/g](D) (b)[mmol/ml](W) moisture content[%] Main uses 001*7 Styrene-DVB –SO-3 (a)≥4.5 (b)≥1.8 46-52 preparation of pure water,hydrometallurgy D001-cc Styrene-DVB –SO-3 (a)≥4.1 (b)≥1.6 42-55 Organocatalysis,Biologically extracted D072 Styrene-DVB –SO-3 (a)≥4.4 (b)≥1.4 45 -55 Organocatalysis,water treatment D061 Styrene-DVB –SO-3 (a)≥4.2 (b)≥1.4 44-54 food industry,water treatment NKC-9 dry hydrogen Styrene-DVB –SO-3 (a)≥4.7 (b)≥1.5 ≤10 Organocatalysis Fig 1.The sulfur removal of 001*7resin in Fig 2.
Fig 1-5 show that different types of resin have different characteristics.For the pure resins,adsorption is the main desulfurization method and the physisorption predominates.So when the temperature was too high or too low,the sulfur removal was unobvious.The reason is that in low temperature physisorption was weak but in high temperature desorption took the chief role.In most cases,50℃-60℃ was appropriate.Because of the structures and moisture contents were not exactly the same,five different types of resins had their own optimal conditions.