Influence of Mineralogical and Micro-Structural Changes on the Physical and Strength Properties of Post-thermal-Treatment Clayey Rocks

2020 ◽  
Author(s):  
Hakan Ersoy ◽  
Murat Karahan ◽  
Hasan Kolaylı ◽  
M. Oğuz Sünnetci
Keyword(s):  
Thermal Treatment ◽  
Structural Changes ◽  
Strength Properties ◽  
Clayey Rocks

XRD investigation of thermal degradation of some gamma-irradiated polyethylene terephthalate samples

2019 ◽  
Vol 33 (12) ◽  
pp. 1950111 ◽  
Author(s):  
Mihai Todica ◽  
Zoltan Kovacs-Krauss ◽  
Carmen Niculaescu ◽  
Marieta Mureşan-Pop
Keyword(s):  
Thermal Treatment ◽  
Polyethylene Terephthalate ◽  
Structural Changes ◽  
Diffraction Method ◽  
Resonance Spectroscopy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Before And After ◽  
Gamma Irradiated ◽  
Different Doses

The modification of local structure of some commercial polyethylene terephthalate (PET) samples, gamma irradiated at different doses, was investigated by X-ray diffraction method before and after thermal treatment. Before the thermal treatment, the samples exposed to different doses of gamma radiations, does not show noticeable structural changes. However, the gamma exposure affects the thermal behavior of samples submitted to melting–cooling process. These modifications have been highlighted by X-ray diffraction, and confirmed also by thermal analysis and electron spin resonance spectroscopy.

Structural changes of polyvinylchloride fibre produced by thermal treatment

1969 ◽  
Vol 11 (7) ◽  
pp. 1726-1733 ◽  
Author(s):  
Z.P. Vysotskaya ◽  
V.D. Fikhman ◽  
V.M. Alekseyeva ◽  
Yu.V. Glazkovskii ◽  
Yu.A. Zubov ◽  
...  
Keyword(s):  
Thermal Treatment ◽  
Structural Changes

Silica structural changes induced by thermal treatment or ionic implantation as probed by IR reflectance spectroscopy

2009 ◽  
Vol 106 (6) ◽  
pp. 063512 ◽  
Author(s):  
N. Bibent ◽  
A. Faivre ◽  
G. Ferru ◽  
J.-L. Bantignies ◽  
S. Peuget
Keyword(s):  
Thermal Treatment ◽  
Structural Changes ◽  
Reflectance Spectroscopy ◽  
Ir Reflectance ◽  
Ionic Implantation

Multilayer Films from Templated TiO2and Structural Changes during their Thermal Treatment

2008 ◽  
Vol 20 (9) ◽  
pp. 2985-2993 ◽  
Author(s):  
Jan Procházka ◽  
Ladislav Kavan ◽  
Valery Shklover ◽  
Markéta Zukalová ◽  
Otakar Frank ◽  
...  
Keyword(s):  
Thermal Treatment ◽  
Structural Changes ◽  
Multilayer Films

Structural Changes from Native Waxy Maize Starch Granules to Cold-Water-Soluble Pyrodextrin during Thermal Treatment

2014 ◽  
Vol 62 (18) ◽  
pp. 4186-4194 ◽  
Author(s):  
Yanjie Bai ◽  
Liming Cai ◽  
James Doutch ◽  
Elliot P. Gilbert ◽  
Yong-Cheng Shi
Keyword(s):  
Thermal Treatment ◽  
Structural Changes ◽  
Cold Water ◽  
Water Soluble ◽  
Starch Granules ◽  
Maize Starch ◽  
Waxy Maize

scholarly journals Exploring the structures, stability, and light absorption properties of three thiostannates synthesised at similar conditions

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Henrik S. Jeppesen ◽  
Peter Nørby ◽  
Jens Jakob Gammelgaard ◽  
Kasper Borup ◽  
Nina Lock
Keyword(s):  
Thermal Stability ◽  
Thermal Treatment ◽  
Light Absorption ◽  
Structural Changes ◽  
Function Analysis ◽  
Layered Compounds ◽  
Organic Cations ◽  
Absorption Properties ◽  
Structure Directing Agent ◽  
Cation Order

AbstractWe present the synthesis, crystal structures and optical properties of three thiostannates prepared by using 1-(2-aminoethyl)piperazine (AEPz) as structure directing agent. Two of the thiostannates are layered materials (AEPz-SnS-1 and AEPz:EtOH-SnS-1) consisting of [Sn3S72−]n sheets with organic cations located in-between. The third compound is a molecular thiostannate (Sn2S6(AEPzH2)2) composed of dimeric Sn2S64− and AEPzH22+. In preparation of the layered compounds, the use of AEPz as the only solvent results in AEPz-SnS-1 with regular hexagonal pores and crystallographically disordered organic cations. In contrast, a mixture of AEPz and absolute ethanol gives AEPz:EtOH-SnS-1 with distorted hexagonal pores and ordered cations between the layers. The influence of cation order on the light absorption properties and the material thermal stability was investigated through thermal treatment of the layered compounds up to 200 °C. Both compounds show colour changes when heated, but cation order results in larger thermal stability. For AEPz-SnS-1, a decreased inter-layer distance and substantial loss of organic matter was observed when heated. However, pair distribution function analysis reveals that the local in-layer thiostannate structure of AEPz-SnS-1 remains unchanged. In contrast, AEPz:EtOH-SnS-1 does not undergo noticeable structural changes by the thermal treatment. All materials are optical semiconductors with band gaps of 3.0–3.1 eV.

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