High‐temperature x‐ray diffraction analysis for Bi2Sr2CaCu2Oy

1992 ◽  
Vol 60 (21) ◽  
pp. 2692-2694 ◽  
Author(s):  
T. Hasegawa ◽  
T. Kitamura ◽  
H. Kobayashi ◽  
H. Kumakura ◽  
H. Kitaguchi ◽  
...  
Keyword(s):  
High Temperature ◽  
Diffraction Analysis ◽  
X Ray Diffraction ◽  
X Ray

scholarly journals X-ray diffraction analysis of kaolin M1 and M2 via the Williamson–Hall and Warren–Averbach methods

2021 ◽  
pp. 174751982098472
Author(s):  
Lalmi Khier ◽  
Lakel Abdelghani ◽  
Belahssen Okba ◽  
Djamel Maouche ◽  
Lakel Said
Keyword(s):  
Grain Size ◽  
High Temperature ◽  
Low Temperature ◽  
Diffraction Analysis ◽  
Mechanical Resistance ◽  
X Ray Diffraction ◽  
Integral Breadth ◽  
X Ray ◽  
Mullite Phase

Kaolin M1 and M2 studied by X-ray diffraction focus on the mullite phase, which is the main phase present in both products. The Williamson–Hall and Warren–Averbach methods for determining the crystallite size and microstrains of integral breadth β are calculated by the FullProf program. The integral breadth ( β) is a mixture resulting from the microstrains and size effect, so this should be taken into account during the calculation. The Williamson–Hall chart determines whether the sample is affected by grain size or microstrain. It appears very clearly that the principal phase of the various sintered kaolins, mullite, is free from internal microstrains. It is the case of the mixtures fritted at low temperature (1200 °C) during 1 h and also the case of the mixtures of the type chamotte cooks with 1350 °C during very long times (several weeks). This result is very significant as it gives an element of explanation to a very significant quality of mullite: its mechanical resistance during uses at high temperature remains.

X-ray diffraction analysis of (Na0.6H0.4)(Ta0.7Nb0.3)O3

1999 ◽  
Vol 14 (3) ◽  
pp. 231-233 ◽  
Author(s):  
Raj P. Singh ◽  
Michael J. Miller ◽  
Jeffrey N. Dann
Keyword(s):  
High Temperature ◽  
Diffraction Analysis ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Unit Cell ◽  
Type Structure ◽  
Powder Diffraction Data ◽  
X Ray Diffraction ◽  
X Ray

(Na0.6H0.4)(Ta0.7Nb0.3)O3 was synthesized by heating a tantalum/niobium scale containing two sodium tantalate/niobate phases :Na14(Ta0.7Nb0.3)12O37·31H2O and NaH2Ta0.7Nb0.3O4. Powder X-ray diffraction data for (Na0.6H0.4)(Ta0.7Nb0.3)O3 indicated it to be a cubic perovskite (ABO3/ReO3 type structure) with unit cell a0=3.894 Å. The compound is analogous to the mineral lueshite (NaNbO3), and to the high temperature forms of NaTaO3 and NaNbO3. Powder diffraction data for (Na0.6H0.4)(Ta0.7Nb0.3)O3 will be useful in the analysis of synthetic tantalum/niobium concentrates.

scholarly journals Reducibilities of Wüstite and Calcio-wüstite in Terms of High Temperature X-ray Diffraction Analysis

2017 ◽  
Vol 57 (4) ◽  
pp. 681-688 ◽  
Author(s):  
Boyuan Cai ◽  
Takashi Watanabe ◽  
Chikashi Kamijo ◽  
Kohei Sunahara ◽  
Masahiro Susa ◽  
...  
Keyword(s):  
High Temperature ◽  
Diffraction Analysis ◽  
X Ray Diffraction ◽  
X Ray

X-ray diffraction analysis at high temperature on two ceramic systems

1983 ◽  
Vol 18 (8) ◽  
pp. 2510-2516 ◽  
Author(s):  
A. Benedetti ◽  
G. Fagherazzi ◽  
S. Meriani
Keyword(s):  
High Temperature ◽  
Diffraction Analysis ◽  
X Ray Diffraction ◽  
X Ray

The low-temperature form of calcium gold stannide, CaAuSn

2014 ◽  
Vol 70 (8) ◽  
pp. 773-775 ◽  
Author(s):  
Qisheng Lin ◽  
John D. Corbett
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Single Crystal ◽  
Diffraction Analysis ◽  
Orthorhombic Symmetry ◽  
X Ray Diffraction ◽  
X Ray ◽  
Symmetry Space ◽  
High Temperature Polymorph ◽  
Symmetry Space Group

The EuAuGe-type CaAuSn phase has been synthesized and single-crystal X-ray diffraction analysis reveals that it has an orthorhombic symmetry (space groupImm2), witha= 4.5261 (7) Å,b= 7.1356 (11) Å andc= 7.8147 (11) Å. The structure features puckered layers that are connected by homoatomic Au—Au and Sn—Sn interlayer bonds. This structure is one of the two parent structures of its high-temperature polymorph (ca873 K), which is an intergrowth structure of the EuAuGe- and SrMgSi-type structures in a 2:3 ratio.

Monitoring of Calcium Sulphate Phase Transformations Using High-Temperature X-Ray Diffraction

2013 ◽  
Vol 864-867 ◽  
pp. 621-624 ◽  
Author(s):  
Dominik Gazdič ◽  
Iveta Hájková ◽  
Radek Magrla
Keyword(s):  
High Temperature ◽  
Diffraction Analysis ◽  
Phase Transformations ◽  
Calcium Sulphate ◽  
Raw Material ◽  
X Ray Diffraction ◽  
X Ray

Within the task the so called high-temperature X-ray diffraction analysis (HT-XRD) was used in the field of sulphated binders. Gypsum or calcium sulphate CaSO4.2H2O is the basic raw material for the sulphated binder production. As it is known by gradual warming of gypsum its different phase transformations can be obtained which significantly differ in its properties. Using this analysis identifications of temperatures of particular phase transformations in the CaSO4·xH2O system can be performed.

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