A STUDY ON CALCINATION REACTION ASSESSMENT OF CLINKER RAW MATERIALS BY A HIGH-TEMPERATURE X-RAY DIFFRACTION

Using high quality carbon raw material,high quality silica raw material , the β-SiC powder are prepared by high-temperature vacuum smelting method. The effects of different materials and electrical power to the product of β-SiC quality has been studied. The microstructure and phase analysis of β-SiC powder samples were observed by Scanning Electron Microscopy and X-ray diffraction. The result shows that the raw materials are better, the product quality are better. In addition, the result also indicates that the β-SiC powder have better quality when the power are 3000W.

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Synthesis of Al4SiC4 Powders from Kaolin Grog, Aluminum and Activated Carbon as Raw Materials

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.399-401.788 ◽

2011 ◽

Vol 399-401 ◽

pp. 788-791 ◽

Cited By ~ 8

Author(s):

Wen Jie Yuan ◽

Jun Li ◽

Chao Pan ◽

Cheng Ji Deng ◽

Hong Xi Zhu

Keyword(s):

Activated Carbon ◽

Electron Microscope ◽

High Temperature ◽

Raw Materials ◽

Synthesis Temperature ◽

Phase Changes ◽

Temperature Structure ◽

X Ray Diffraction ◽

X Ray ◽

Scanning Electron

In Al-Si-C system, there are many compounds, of which Al4SiC4 is useful as high-temperature structure material and the antioxidant in carbon-containing refractory. In this paper, Al4SiC4 powders were synthesized by using kaolin grog, aluminum and activated carbon as raw materials. The phase changes of the synthesized samples were examined by X-ray diffraction (XRD), and the microstructure was observed by scanning electron microscope (SEM). The effects of synthesis temperature and the proportion of aluminum on phase compositions of Al-Si-C system were investigated. The results show plate-like Al4SiC4 powders can be prepared with optimal ratio of starting materials and synthesis temperature.

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Synthesis of LiFe0.97Nb0.03PO4C by High Temperature Ball Milling

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.616-618.1902 ◽

2012 ◽

Vol 616-618 ◽

pp. 1902-1905

Author(s):

Juan Wang ◽

Zhong Bao Shao ◽

Hong Qiang Ru

Keyword(s):

Electron Microscope ◽

High Temperature ◽

Ball Milling ◽

Performance Test ◽

Raw Materials ◽

Capacity Fade ◽

X Ray Diffraction ◽

Capacity Retention ◽

X Ray ◽

Scanning Electron

LiFe0.97Nb0.03PO4/C was synthesized by the method of high temperature ball milling (HTBM), using raw materials including Fe2O3, LiH2PO4, Nb2O5and glucose, which was used as reductant and carbon source. The samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and electrochemical performance test. The sample synthesized at 700 °C for 8h showed excellent electrochemical properties, with the discharge capacity as high as 140 mA•h/g at 0.1C rate respectively. The sample also showed an excellent capacity retention as there was no significant capacity fade after 10 cycles.

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Phase evolution of MgB2 prepared under high pressure

Powder Diffraction ◽

10.1154/1.3010311 ◽

2008 ◽

Vol 23 (4) ◽

pp. 334-337

Author(s):

Yaxin Sun ◽

Dongli Yu

Keyword(s):

High Pressure ◽

High Temperature ◽

Raw Materials ◽

Phase Evolution ◽

Decomposition Temperature ◽

Superconducting Transition ◽

X Ray Diffraction ◽

Crystalline Perfection ◽

Experimental Conditions ◽

X Ray

MgB2 superconductors were synthesized at high pressure and high temperature (HPHT) using pure Mg and B as raw materials. The effects of the experimental conditions such as pressure and temperature on phase evolution were studied using X-ray diffraction (XRD), scanning electron microscope (SEM), and DC magnetization techniques. Results showed that high pressure and high temperature are two important factors for synthesizing the MgB2 phase. Stable MgB2 can be most effectively obtained in a pressure-temperature region from 3 to 6 GPa and between the melting points of Mg up to 1100 to 1300 °C. MgB2 starts to decompose into MgB4 at higher temperatures and pressures. The decomposition temperature of MgB2 increases with increasing pressure. The superconducting transition temperature Tc(bulk) was measured to be 38.0 to 38.8 K for MgB2 prepared at 900 to 1000 °C under 3 GPa. The larger grains and better crystalline perfection contribute to the higher Tc(bulk) and the narrower ΔT.

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High temperature X-ray diffraction investigation of an aluminium-silicon-corundum system

Zeitschrift für Kristallographie Supplements ◽

10.1524/zksu.2007.2007.suppl_26.369 ◽

2007 ◽

Vol 2007 (suppl_26) ◽

pp. 369-374 ◽

Cited By ~ 1

Author(s):

D. Garipoli ◽

P. Bergese ◽

E. Bontempi ◽

M. Minicucci ◽

A. Di Cicco ◽

...

Keyword(s):

High Temperature ◽

X Ray Diffraction ◽

X Ray

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High-pressure synthesis and crystal structure of the mixed-cation borate Ga4In4B15O33(OH)3

Zeitschrift für Naturforschung B ◽

10.1515/znb-2019-0014 ◽

2019 ◽

Vol 74 (4) ◽

pp. 357-363

Author(s):

Daniela Vitzthum ◽

Hubert Huppertz

Keyword(s):

Crystal Structure ◽

High Pressure ◽

High Temperature ◽

Diffraction Data ◽

X Ray Diffraction ◽

Synthesis And Crystal Structure ◽

X Ray ◽

Mixed Cation ◽

High Pressure High Temperature ◽

Pressure Synthesis

AbstractThe mixed cation triel borate Ga4In4B15O33(OH)3 was synthesized in a Walker-type multianvil apparatus at high-pressure/high-temperature conditions of 12.5 GPa and 1300°C. Although the product could not be reproduced in further experiments, its crystal structure could be reliably determined via single-crystal X-ray diffraction data. Ga4In4B15O33(OH)3 crystallizes in the tetragonal space group I41/a (origin choice 2) with the lattice parameters a = 11.382(2), c = 15.244(2) Å, and V = 1974.9(4) Å3. The structure of the quaternary triel borate consists of a complex network of BO4 tetrahedra, edge-sharing InO6 octahedra in dinuclear units, and very dense edge-sharing GaO6 octahedra in tetranuclear units.

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The Application of X-Ray Diffraction at Elevated Temperatures to Study the Mechanism of Formation of Sodium Tripolyphosphate

Advances in X-ray Analysis ◽

10.1154/s0376030800001634 ◽

1961 ◽

Vol 5 ◽

pp. 276-284

Author(s):

E. L. Moore ◽

J. S. Metcalf

Keyword(s):

High Temperature ◽

Low Temperature ◽

Amorphous Phase ◽

Elevated Temperatures ◽

Sodium Tripolyphosphate ◽

X Ray Diffraction ◽

Mechanism Of Formation ◽

X Ray ◽

Temperature Form ◽

High Temperature Form

AbstractHigh-temperature X-ray diffraction techniques were employed to study the condensation reactions which occur when sodium orthophosphates are heated to 380°C. Crystalline Na4P2O7 and an amorphous phase were formed first from an equimolar mixture of Na2HPO4·NaH2PO4 and Na2HPO4 at temperatures above 150°C. Further heating resulted in the formation of Na5P3O10-I (high-temperature form) at the expense of the crystalline Na4P4O7 and amorphous phase. Crystalline Na5P3O10-II (low-temperature form) appears after Na5P3O10-I.Conditions which affect the yield of crystalline Na4P2O7 and amorphous phase as intermediates and their effect on the yield of Na5P3O10 are also presented.

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Mechanical Alloying Behavior in the Nb-Si, Ta-Si, and Nb-Ta-Si Systems

MRS Proceedings ◽

10.1557/proc-133-415 ◽

1988 ◽

Vol 133 ◽

Cited By ~ 3

Author(s):

K. S. Kumar ◽

S. K. Mannan

Keyword(s):

High Temperature ◽

Mechanical Alloying ◽

Mechanical Milling ◽

Room Temperature ◽

Crystalline Compound ◽

X Ray Diffraction ◽

X Ray ◽

Β Phase ◽

Α Phase

ABSTRACTThe mechanical alloying behavior of elemental powders in the Nb-Si, Ta-Si, and Nb-Ta-Si systems was examined via X-ray diffraction. The line compounds NbSi2 and TaSi2 form as crystalline compounds rather than amorphous products, but Nb5Si3 and Ta5Si3, although chemically analogous, respond very differently to mechanical milling. The Ta5Si3 composition goes directly from elemental powders to an amorphous product, whereas Nb5Si3 forms as a crystalline compound. The Nb5Si3 compound consists of both the tetragonal room-temperature α phase (c/a = 1.8) and the tetragonal high-temperature β phase (c/a = 0.5). Substituting increasing amounts of Ta for Nb in Nb5Si3 initially stabilizes the α-Nb5Si3 structure preferentially, and subsequently inhibits the formation of a crystalline compound.

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Waste and Solar Energy: An Eco-Friendly Way for Glass Melting

ChemEngineering ◽

10.3390/chemengineering5020016 ◽

2021 ◽

Vol 5 (2) ◽

pp. 16

Author(s):

Isabel Padilla ◽

Maximina Romero ◽

José I. Robla ◽

Aurora López-Delgado

Keyword(s):

Solar Energy ◽

Environmental Sustainability ◽

Raw Materials ◽

Glass Melting ◽

Glass Network ◽

X Ray Diffraction ◽

X Ray ◽

Concentrated Solar Energy ◽

Calcium Source ◽

The Aluminum Industry

In this work, concentrated solar energy (CSE) was applied to an energy-intensive process such as the vitrification of waste with the aim of manufacturing glasses. Different types of waste were used as raw materials: a hazardous waste from the aluminum industry as aluminum source; two residues from the food industry (eggshell and mussel shell) and dolomite ore as calcium source; quartz sand was also employed as glass network former. The use of CSE allowed obtaining glasses in the SiO2-Al2O3-CaO system at exposure time as short as 15 min. The raw materials, their mixtures, and the resulting glasses were characterized by means of X-ray fluorescence, X-ray diffraction, and differential thermal analysis. The feasibility of combining a renewable energy, as solar energy and different waste for the manufacture of glasses, would highly contribute to circular economy and environmental sustainability.

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