Search results

Xiong* College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China Keywords: Microwave ceramics, Hydrothermal conditions, ZST Abstract.
Effects of hydrothermal conditions on crystal structure, morphology and sintering perfor- mance of the powders were characterized by X-ray, SEM and TG-DTA, respectively.

The mechanism of dielectric constant transition is well explained based on the inter-band and in-band shift of band structure.
Therefore, there are close relations with physical, chemical properties, composition, structure, crystal structure, geometry, morphology and structure.
Fig. 2 is Ge quantum dots for different growth temperatures (Ge0.6Si0.4) three crystal structure model.
So the temperature is the important reason for the band structure change.
Leite et al: Physical Chemistry C 2009, 113: 9018–9022

The effect of calcinations temperature of Cu/PILCs on catalytic activity, pore structure and active species were investigated.
The pore structure of Cu/Ti-PILCs had good thermal stability below 600˚C calcinations. 700˚C-calcined catalyst has poor catalytic activity.
It means that the pore structure of Ti-PILCs maintain its stability at a certain extent under 600˚C.
The effect of calcinations temperature of Cu/PILCs on catalytic activity, pore structure and active species was investigated.
The pore structure of Cu/Ti-PILCs has good thermal stability below 600˚C calcinations.

Vernadskii Institute of General and Inorganic Chemistry, NAS of Ukraine, Prosp.
In this work, we considered three types of ferromagnetic materials: barium hexaferrite (BaFe12O19), lanthanum-strontium manganites with perovskite structure ((La,Sr)MnO3) and materials with spinel structure (AFe2O4, A = Ni, Zn, Co, Mn, Fe).
In the synthesis of (La, Sr)MnO3 nanoparticles with perovskite structure amorphous precipitates were formed.
In contrast to these samples, Fe3O4 nanoparticles with spinel structure were formed during synthesis at T = 353K.
Yurkov, Magnetic nanoparticles: preparation methods, structure and properties, Uspekhi Khimii (in Rus). 74 (2005) 539-574

The effect of annealing on the photochromic properties was studied to obtain a better understanding of the interaction of the structure.
Ag nanoparticles were formed between TiO2 films after annealing the samples with Ag film structure.
The film structure of Ag was obtained on TiO2 film by adjusting the at DC potential 164V, w = 100 W, p = 0.01 mbar, t = 30s as shown in Fig. 3 (a).
The formation of island structure can minimize the interface energy between the two materials.
Formation and electronic structure of TiO2-Ag interface.

Interior Environment of the Buildings Hit by Floods Jan Pasek1,a, Tereza Tribulova2,b, Jiri Frankl3,c 1 University of West Bohemia, Faculty of Applied Sciences, Department of Mechanics, Univerzitni 8, 306 14 Pilsen, Czech Republic 2 Technical University in Zvolen, Faculty of Wood Science and Technology, Department of Chemistry and Chemical Technology, T.
The layout, pore structure, and arrangement of each layer in case of sandwich structures influence the character of water penetration into the material the most.
Both-sides plastered masonry is an example of traditional structure.
However when the flooding is longer, the water penetrates into the structures even through tight surface, which can later protect structures from drying.
Modern sandwich timber structures brought new phenomenon.

The whiskers are straight and slightly rough and consist of β-SiC crystals with bamboo-like structure.
Introduction Silicon carbide (SiC) whiskers have been interested as a reinforcing material for use in plastics, metals and ceramics to produce strong and tougher composite ceramics and light metal alloys because they are fine structure and have a mechanical strength close to theoretical [1,2].
From Fig. 5 the single crystalline β-SiC structure with growth along the (1 1 1) direction was confirmed [19].
The whiskers are straight and slightly rough and consist of β-SiC crystals with bamboo-like structure.
,Vol.54 (1975), p.195 [11] Guangyi Yang, Renbing Wu, Jianjun Chen, Fangfang Song, Yi Pan:Materials Chemistry and Physics Vol.106 (2007), p.236 [12] R.

The morphology and structure of treated composite nanofibers were analyzed by SEM and XRD.
Two kinds of nanofibers SnO2 and In2O3, respectively, ejected from their nozzles at the same time, and moved to opposite direction, forming an netted structure SnO2/In2O3 composite nanofibers composite.
Gas sensors with a ceramic tube structure [4] were fabricated by using the treated SnO2/In2O3 composite nanofibers.
The structures of the nanofibers were characterized by an X-ray diffraction instrument (XRD: D/Max 2400, Rigaku, Japan) in 2θ region of 20~80° with Cu Kα1 radiation.
Xu, Coordination Chemistry Reviews Vol. 254 (2010), p. 1135

Its chemical structures were characterized by Fourier-transform infrared spectroscopy (FT-IR) and elemental analysis.
When heated, the acid source and carbon source to occur esterification reaction, the carbon source dehydrated then form carbonized char layer, and in the heat air source is decompose to produce a large number of toxic gases and not flammable compounds to enable expansion of the carbon layer, porous structure formed on the surface.
Since it was found that triazine compounds containing a large amount of N and tertiary nitrogen structure is a kind of well charring agent[1].
In addition, 1498cm-1 in spectrum had absorption peak bond of C (triazine-based) –N (diethylenetriamine), noted triazine-based and diethylenetriamine had substitution reaction, the formation of C (triazine-based) -N (diethylenetriamine) structure.
Signore and et al: Journal of Medicinal Chemistry, 2004, 47(19),4649-4652

However, there are few inorganic semiconductors that show useful electronic properties when deposited as amorphous structures.
Photoelectron spectroscopy has proved to be a very powerful technique, and has revealed that in spite of significant interfacial chemistry, this picture is moderately successful [17].
The inset shows the chemical structure for an iridium complex which shows efficient triplet luminescence (phosphorescence) when used as the emissive material in an LED structure [21].
Figure 8 shows one of the early laser structure and associated lasing modes for a polymer device [34].
Gregg: Journal of Physical Chemistry B Vol. 107 (2003) p. 4688-98