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Online since: July 2012
Authors: Hao Huai Liu, Peng Liu, Cai Qin Gu, Qing Zhu Zeng
The Extrapolation Method for Hyper Differential Scanning Calorimetry
PENG Liu1, a, CAIQIN Gu1, b, QINGZHU Zeng1, c, HAOHUAI Liu1,d
1 School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, China
aliu_peng@gzhu.edu.cn; bgcq86@163.com; cqingzhuzeng@yahoo.com.cn; dhuaihuai99@163.com
Keywords: Hyper-DSC; Extrapolation Method; MT-DSC
Abstract.
The peak in HF should be due to the melting of crystalline structures, and the stepwise change in RHF could be ascribed to the glass transition process.
The peak in HF should be due to the melting of crystalline structures, and the stepwise change in RHF could be ascribed to the glass transition process.
Online since: April 2011
Authors: Michael Josef Zehetbauer, Gerda Rogl, Peter Rogl, Ernst Bauer, Andriy Grytsiv
Enhanced thermoelectric figure of merit in p-type DDy(Fe1-xCox)4Sb12
Gerda Rogl1,2,3,a, Andriy Grytsiv1,b, Peter Rogl1,c, Ernst Bauer2,d and
Michael Zehetbauer3,e
1 Inst. of Physical Chemistry, Univ. of Vienna, Währingerstr. 42, A-1090 Wien, Austria
2 Inst. of Solid State Physics, Univ. of Technology, Wiedner Hauptstr. 8-10, A-1040 Wien, Austria
3 Physics of Nanostructured Materials, Univ.of Vienna, Boltzmanngasse 5, A-1090 Wien, Austria
agerda.rogl@univie.ac.at, bandriy.grytsiv@univie.ac.at, cpeter.franz.rogl@univie.ac.at, dbauer@ifp.tuwien.at, emichael.zehetbauer@univie.ac.at
Keywords: Skutterudite; Thermoelectric properties; Nanomaterials
Abstract Thermoelectric (TE) properties of skutterudites DDy(Fe1-xCox)4Sb12 for 0.2 £ x £0.3 were studied in the temperature range from 300 K to 800 K and compared with values for x = 0.
We employed ball milling to produce small particle sizes (100 - 200 nm) known to increase thermoelectric performance via nano-structuring [19].
We employed ball milling to produce small particle sizes (100 - 200 nm) known to increase thermoelectric performance via nano-structuring [19].
Online since: May 2012
Authors: Jing Miao Li, Bao Quan Huo, Ji Bing Wang, Qi Na Sun
Thus, cement with different hydration chemistries has received increasing attention on solidification/stabilization of hazardous wastes.
Extensive substitution and solid-solution in the ettringite crystal structure enable SAC to have high affinities for cationic heavy metals [8].
Extensive substitution and solid-solution in the ettringite crystal structure enable SAC to have high affinities for cationic heavy metals [8].
Online since: November 2012
Authors: Hong Yu Liu, Jun Jie Xi, Jun Qing Liu
This paper studied the influence of materials to outer environment, the principle of materials selection for green manufacturing, the key technique of multi-objective decision-making of materials selection for green manufacturing, supporting technologies of database and knowledge base of green materials and environmental influence evaluation system based on green materials life cycle.
2 The Influence of Material to Outer Environment
The whole life period of product refers actually to the process of based on workpiece materials, accompanied by the changes of material performance, shape and structure.
Engineering material manufacture industry mainly contains metallurgy, chemistry and chemical engineering industry which all result in environmental pollution.
Engineering material manufacture industry mainly contains metallurgy, chemistry and chemical engineering industry which all result in environmental pollution.
Online since: May 2011
Authors: Ming Chin Yeh, Jyh Dong Lin, C. T. Hung, Shih Huang Chen
Porous asphalt concrete due to its open structure is exposed to water and therefore susceptible to water damage.
Walzak. in: Effects of moisture on surface chemistry of steel slags and steel slag-asphalt paving mixes.
Walzak. in: Effects of moisture on surface chemistry of steel slags and steel slag-asphalt paving mixes.
Online since: July 2012
Authors: Ru Wang, Zhen Zhang, Hui Yun Liu, Wei Hu
The basic molecular structure of bayberry tannin is epigallocatechin, and the adjacent phenolic hydroxyl groups which coordinate with V(V) are located at the B-ring of epigallocatecin according to our quanta theoretics calculate.
Hou, et al, Adsorption of Metal Ions By Myrtan Tannins Immobilized on Collagen fiber, Chemistry and Industry of Forest Products. 25(2005)10-14
Hou, et al, Adsorption of Metal Ions By Myrtan Tannins Immobilized on Collagen fiber, Chemistry and Industry of Forest Products. 25(2005)10-14
Online since: January 2010
Authors: M. Frías, Olga Rodríguez, M.I. Sánchez de Rojas, S. Ferreiro, B. Nebreda, Javier Olmeda
During the pozolanic reaction, different
hydrated phases are formed (mainly CSH gel) (Fig. 3) which can produce a refinement process on
the pore structure of blended mortars, improving the mechanical resistance as happens with other
active additions such as silica fume and commercial metakaolin.
Taylor: Cement Chemistry, (Thomas Telford, London, 1997) [3] A.
Taylor: Cement Chemistry, (Thomas Telford, London, 1997) [3] A.
Online since: October 2010
Authors: Guang Ling Zhou, Min Zheng Jiang, Yu Xin Dai, Yan Peng Cao
−
−
−=
λ
σαγ
σ ; CePP
z
H
f
f )1)(~2
~
(
~
−
−+=
λ
σαγ
σ (8)
In the range of szl << , the interface is completely glued, therefore )()( zuzu m f = , from rσ ,
θσ and boundary conditions, it can obtain:
[ ]**1
)( H
f
mf P
E
szuu σ+
−== (9)
Where:
+−
= A
c
c
KcPcP
m
f
mf
m
f ))((21
22
~
*
γαγ ;
−−+
= Ac
c
c
K
fm
m
f
mf
m
H
H γγγγγ
σ
σ ))((42
~*
at lz = ,
AcccK mf
2
2−+=α ; [ ]**
)( H f
mf PElsuu σ+
−−== (10)
*
P and * Hσ denote the contribution of force and stress on the displacement of casing and matrix
respectively, which are characteristic parameters of material constants and structure
Plasma Chemistry and Plasma Processing.28(6): 701-713(2008)
Plasma Chemistry and Plasma Processing.28(6): 701-713(2008)
Online since: July 2011
Authors: Shinji Kajii, Mrityunjay Singh, Rajiv Asthana, Hua Tay Lin, Toshihiro Ishikawa, Tadashi Matsunaga
Some of the chemical reactions and the corresponding Gibbs’ free energy changes per mole of Ti at the brazing temperatures used in the study, calculated using the software HSC Chemistry version 4.1 (Outokumpu Ra, Oy, Finland), are:
2SiC + Ti = TiSi2 + 2C; ΔG1193K = - 37.2 kJ
(3/5) SiC + Ti = (1/5) Ti5Si3 + (3/5) C; ΔG1193K = - 80.1 kJ
SiC + Ti = TiC + Si; ΔG1193K = - 109.1 kJ
C + Ti = TiC; ΔG1193K = - 172.0 kJ
Thus, formation of titanium carbide (TiC) and titanium silicides (TiSi2, Ti5Si3) in the joint is thermodynamically feasible (ΔG<0).
Formation of complex ternary and higher order interfacial compound layers is likely to change the structure and properties of the joint.
Formation of complex ternary and higher order interfacial compound layers is likely to change the structure and properties of the joint.