Thermoanalytical (TGA-DSC) and high temperature X-ray diffraction (HT-XRD) study of the thermal decomposition processes in Li2CO3–MnO mixtures

2002 ◽  
Vol 64 (1) ◽  
pp. 43-58 ◽  
Author(s):  
Vittorio Berbenni ◽  
A. Marini
Keyword(s):  
Thermal Decomposition ◽  
High Temperature ◽  
X Ray Diffraction ◽  
X Ray ◽  
Xrd Study ◽  
Decomposition Processes

Structural-phase transition in (Cu2Te)2−x(ZnTe)x at high temperature

2021 ◽  
pp. 2150113
Author(s):  
H. B. Gasimov ◽  
R. M. Rzayev
Keyword(s):  
Phase Transition ◽  
Phase Transitions ◽  
High Temperature ◽  
Single Crystals ◽  
Structural Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
Temperature Range ◽  
Xrd Study ◽  
Xrd Method

Cu2Te single crystal was grown by the Bridgman method. X-ray diffraction (XRD) study of Cu2Te single crystals in the temperature range of 293–893 K was performed and possible phase transitions in the mentioned range of temperature have been investigated. (Cu2Te)[Formula: see text](ZnTe)[Formula: see text] single crystals also were grown with [Formula: see text], 0.05, 0.10 concentrations and structural properties of the obtained single crystals were investigated by the XRD method in the temperature range 293–893 K. Lattice parameters and possible phase transitions in the mention temperature range were determined for (Cu2Te)[Formula: see text](ZnTe)[Formula: see text] single crystals for [Formula: see text], 0.05, 0.10 concentrations.

The application of high-temperature X-ray diffraction and infrared emission spectroscopy to the thermal decomposition of kröhnkite

2016 ◽  
Vol 126 (3) ◽  
pp. 1089-1095 ◽  
Author(s):  
Leonardo Pena Testasicca ◽  
Ray L. Frost ◽  
Xiuxiu Ruan ◽  
Jéssica Lima ◽  
Fernanda Maria Belotti ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
High Temperature ◽  
Emission Spectroscopy ◽  
Infrared Emission ◽  
X Ray Diffraction ◽  
X Ray ◽  
Infrared Emission Spectroscopy

Synthesis and characterization of robust three-dimensional chiral metal sulfates

RSC Advances ◽  
2014 ◽  
Vol 4 (92) ◽  
pp. 50435-50442 ◽  
Author(s):  
J. N. Behera ◽  
Joydeep Bhattacharjee ◽  
Satoshi Horike ◽  
Subba R. Marri ◽  
Prem P. Dahiya
Keyword(s):  
Thermal Decomposition ◽  
High Temperature ◽  
First Principles ◽  
Three Dimensional ◽  
Ammonium Ion ◽  
Synthesis And Characterization ◽  
First Principles Calculations ◽  
X Ray Diffraction ◽  
X Ray

Chiral three-dimensional Mg(ii) and Mn(ii) sulfates have been synthesized, well characterized and studied from first-principles calculations. High temperature X-ray diffraction, thermogravimetric analysis and DFT calculations reveal that the structures of both the compounds remain intact even after the thermal decomposition of the ammonium ion.

scholarly journals Effect of Mn3O4 on the Dielectric Characteristics of Cdo - Mn3O4 Nanocomposites

2019 ◽  
Vol 8 (11) ◽  
pp. 1285-1290
Keyword(s):  
Thermal Decomposition ◽  
Dielectric Constant ◽  
High Temperature ◽  
Nano Composites ◽  
Conductivity Measurements ◽  
X Ray Diffraction ◽  
Dielectric Parameters ◽  
Dielectric Characteristics ◽  
X Ray ◽  
Lcr Meter

Undoped CdO, Mn3O4 and CdO - Mn3O4 doped nanocomposites in the ratio 9:1, 8:2, 7:3 and 6:4 were successfully synthesized through thermal decomposition at high temperature by adopting the method of solid state reaction. powder X-ray diffraction (PXRD) was employed to carry out the structural characterization. It was found that as the concentration of Mn3O4 was increased the size of the prepared CdO-Mn3O4 composites has decreased. The change of various dielectric variables like dielectric loss (tanδ), dielectric constant (εr ) was determined. Moreover the change of ac conductivity (σac) with respect to frequency was carried out using LCR meter. It was found that these dielectric parameters have increased with respect to the temperature. It was also found that, with an increase in temperature the dc conductivity measurements for the prepared nano composites have also increased

scholarly journals Solid-solid synthesis, characterization and thermal decomposition of a homodinuclear cobalt(II) complex

2015 ◽  
Vol 80 (11) ◽  
pp. 1391-1397 ◽  
Author(s):  
Di Li ◽  
Guo-Qing Zhong ◽  
Zhi-Xian Wu
Keyword(s):  
Thermal Decomposition ◽  
Raw Materials ◽  
Uv Spectra ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Monoclinic System ◽  
X Ray ◽  
Decomposition Processes ◽  
Elemental Analyses ◽  
Percentage Mass Loss

The homodinuclear cobalt(II) complex [Co2(dipic)2(H2O)5]?2H2O was synthesized with pyridine-2,6-dicarboxylic acid (H2dipic) and cobalt(II) acetate as raw materials by room temperature solid-solid reaction. The complex was characterized by elemental analyses, single crystal X-ray diffraction, X-ray powder diffraction, Fourier transform infrared spectroscopy, UV spectra, and thermogravimetry and differential scanning calorimetry. Its crystal structure belongs to monoclinic system and space group P2(1)/c. There are two types of the Co(II) ions, and they are all six-coordination, one Co(II) is coordinated by four carboxyl O atoms and two pyridine N atoms from two dipic2- anions, and another Co(II) is coordinated by five O atoms from five H2O molecules and one bridged carboxyl O atom from the dipic2- anion. The possible pyrolysis reactions in the thermal decomposition processes of the complex, the experimental and calculated percentage mass loss are also given.

scholarly journals Study on the Photoluminescent and Thermal Properties of Zinc Complexes with a N6O4 Macrocyclic Ligand

Molecules ◽  
2018 ◽  
Vol 23 (7) ◽  
pp. 1735 ◽  
Author(s):  
Xingyong Xue ◽  
Qijun Wang ◽  
Fusen Mai ◽  
Xing Liang ◽  
Yichen Huang ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Macrocyclic Ligand ◽  
Quantum Yields ◽  
X Ray Diffraction ◽  
Coordination Environment ◽  
X Ray ◽  
Fluorescence Quantum Yields ◽  
Solid States ◽  
Trigonal Bipyramidal ◽  
Decomposition Processes

Reactions between a N6O4 macrocyclic ligand (L1) and several Zn(II) salts (trifluoromethane sulfonate, p-toluenesulfonate, acetate, benzoate, o-, m- or p-hydroxybenzoate) led to the formation of seven complexes, [Zn2L1 (DMSO)4](OSO2CF3)4 (1), [Zn2(p-OSO2PhCH3)4L1] (2), [Zn2(OCOCH3)4L1] (3), [Zn2(OCOPh)4L1] (4), [Zn2(o-OCOPhOH)4L1] (5), [Zn2(m-OCOPhOH)4 L1] (6) and [Zn2(p-OCOPhOH)4 L1] (7), which were characterized by elemental analysis, 1H-NMR, 13C-NMR, IR, fluorescence spectroscopies and single crystal X-ray diffraction. In 1, the Zn atom is pentacoordinated with a N3O2 irregular trigonal bipyramidal coordination environment, like the geometries in compounds 3–7, whereas in structure 2 the metal atom is envisaged as possessing a distorted N3O3 octahedronal environment. All the compounds show interesting photoluminescent properties in solid states and solutions in DMF and DMSO, which are reported along with their TG-DTA thermal decomposition processes, UV-vis absorption spectroscopy and fluorescence quantum yields in DMF and DMSO.

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