Effect of manganese on sintering processes in the Ti-Fe system. III. High-temperature x-ray diffraction investigation of the sintering process

AbstractThe silicate-type and Eu3+-activated Sr3SiO5 and Mg3SiO5 were prepared through the high temperature solid state reaction method under an open atmosphere. DTA/TG analysis was conducted to obtain information about the thermal behaviors of the mixed reactants. Using the DTA/TG results, the sintering process was achieved and the phase properties were characterized by X-ray diffraction (XRD). The effects of the same activator (Eu3+) and co-dopant (Dy3+) on the photoluminescence (PL) properties of the host lattices were investigated by using a photoluminescence spectrometer.

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The Technology and Structural Properties of Special Glass Modified (Ba0.6Pb0.4)TiO3 Ceramics

Archives of Metallurgy and Materials ◽

10.1515/amm-2016-0282 ◽

2016 ◽

Vol 61 (4) ◽

pp. 1761-1766

Author(s):

B. Wodecka-Dus ◽

M. Adamczyk ◽

T. Goryczka ◽

J. Dzik ◽

D. Radoszewska ◽

...

Keyword(s):

Crystal Structure ◽

Grain Size ◽

High Temperature ◽

Structural Properties ◽

Unit Cell ◽

Basic Material ◽

Sintering Process ◽

X Ray Diffraction ◽

X Ray

Abstract The present paper widely describes the details of technology of (Ba0.6Pb0.4)TiO3 ceramics modified with PbO-B2O3-Al2O3-WO3 special glass, as well as the influence of admixture on the microstructure and crystal structure of basic material. The microstructure investigations reveal the significant increase of grain size and a decrease of pores participation in volume of modified samples, whereas the X-Ray Diffraction (XRD) measurements show a decrease of the volume of unit cell. The obtained results are discussed due to processes occurring during the sintering process at high temperature.

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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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