scholarly journals Mechanistic insight of KBiQ2 (Q = S, Se) using panoramic synthesis towards synthesis-by-design

2021 ◽  
Author(s):  
Rebecca McClain ◽  
Christos D. Malliakas ◽  
Jiahong Shen ◽  
Jiangang He ◽  
Chris Wolverton ◽  
...  
Keyword(s):  
Crystalline Phase ◽  
Phase Evolution ◽  
X Ray Diffraction ◽  
Panoramic View ◽  
X Ray ◽  
Mechanistic Insight

This work uses in situ powder X-ray diffraction studies to observe crystalline phase evolution over the course of multiple K-Bi-Q (Q = S, Se) reactions, thereby constructing a “panoramic” view of each reaction from beginning to end.

Thermal stability and miscibility of co-evaporated methyl ammonium lead halide (MAPbX3, X = I, Br, Cl) thin films analysed by in situ X-ray diffraction

2018 ◽  
Vol 6 (24) ◽  
pp. 11496-11506 ◽  
Author(s):  
Paul Pistor ◽  
Thomas Burwig ◽  
Carlo Brzuska ◽  
Björn Weber ◽  
Wolfgang Fränzel
Keyword(s):  
Thin Films ◽  
Thermal Stability ◽  
Thermal Treatment ◽  
Phase Evolution ◽  
X Ray Diffraction ◽  
Crystalline Phases ◽  
X Ray ◽  
Subsequent Thermal Treatment ◽  
Lead Halide

We present the identification of crystalline phases by in situ X-ray diffraction during growth and monitor the phase evolution during subsequent thermal treatment of CH3NH3PbX3 (X = I, Br, Cl) perovskite thin films.

Zeolite - Salt Occlusion: A Potential Route for the Immobilisation of Iodine-129?

2003 ◽  
Vol 807 ◽  
Author(s):  
Neil C. Hyatt ◽  
Joseph A. Hriljac ◽  
Alia Choudhry ◽  
Laura Malpass ◽  
Gareth P. Sheppard ◽  
...  
Keyword(s):  
Weight Loss ◽  
Uniform Distribution ◽  
Crystalline Phase ◽  
Thermally Stable ◽  
X Ray Diffraction ◽  
Single Crystalline ◽  
X Ray ◽  
Elemental Silver

ABSTRACTReactions of zeolite Na-A with AgI, and the sodium, copper and lead forms of zeolites A, LTA, X and Y with NaI, have been examined as possible starting routes to the long term immobilisation of iodine-129. Heating the salts in air, at 500°C, with the sodium forms of the zeolites leads to the formation of occlusion products, where the iodide salt migrates into the zeolite pores. Detailed studies of the Na-A / 5AgI complex indicate it has a uniform distribution of Na, Si, Al, Ag and I, and is thermally stable to ca. 750°C, where there is a substantial weight loss as iodine is released. In situ powder X-ray diffraction studies have been used to monitor the occlusion reaction at 400°C, and show that the occlusion product decomposes to produce a single crystalline phase at 800°C prior to further decomposition at 850°C to a mixture of nepheline and elemental silver.

Phase evolution of (Ni, Co, Mn)O4 during heat treatment with high temperature in situ X-ray diffraction

2016 ◽  
Vol 42 (4) ◽  
pp. 5412-5417 ◽  
Author(s):  
Sungwook Mhin ◽  
HyukSu Han ◽  
Donghyun Kim ◽  
Sunghwan Yeo ◽  
Jung-Il Lee ◽  
...  
Keyword(s):  
Heat Treatment ◽  
High Temperature ◽  
Phase Evolution ◽  
X Ray Diffraction ◽  
X Ray

Comparative studies of the phase evolution in M-doped LixMn1.5Ni0.5O4 (M = Co, Al, Cu and Mg) by in-situ X-ray diffraction

2014 ◽  
Vol 264 ◽  
pp. 290-298 ◽  
Author(s):  
W. Zhu ◽  
D. Liu ◽  
J. Trottier ◽  
C. Gagnon ◽  
A. Guerfi ◽  
...  
Keyword(s):  
Comparative Studies ◽  
Phase Evolution ◽  
X Ray Diffraction ◽  
X Ray

Electrochemically Induced Phase Evolution of Lithium Vanadium Oxide: Complementary Insights Gained viaEx-Situ,In-Situ, andOperandoExperiments and Density Functional Theory

MRS Advances ◽  
2018 ◽  
Vol 3 (22) ◽  
pp. 1255-1260 ◽  
Author(s):  
Jiefu Yin ◽  
Wenzao Li ◽  
Mikaela Dunkin ◽  
Esther S. Takeuchi ◽  
Kenneth J. Takeuchi ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Density Functional ◽  
Structural Evolution ◽  
Phase Evolution ◽  
X Ray Diffraction ◽  
Functional Theory ◽  
X Ray ◽  
Α Phase ◽  
Lithium Vanadium Oxide

ABSTRACTUnderstanding the structural evolution of electrode material during electrochemical activity is important to elucidate the mechanism of (de)lithiation, and improve the electrochemical function based on the material properties. In this study, lithium vanadium oxide (LVO, LiV3O8) was investigated using ex-situ, in-situ, and operando experiments. Via a combination of in-situ X-ray diffraction (XRD) and density functional theory results, a reversible structural evolution during lithiation was revealed: from Li poor α phase (LiV3O8) to Li rich α phase (Li2.5V3O8) and finally β phase (Li4V3O8). In-situ and operando energy dispersive X-ray diffraction (EDXRD) provided tomographic information to visualize the spatial location of the phase evolution within the LVO electrode while inside a sealed lithium ion battery.

scholarly journals Laboratory X-ray Diffraction Complex for In Situ Investigations of Structural Phase Evolution of Materials under Gaseous Atmosphere

Metals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 447 ◽  
Author(s):  
Maxim Syrtanov ◽  
Georgiy Garanin ◽  
Egor Kashkarov ◽  
Natalia Pushilina ◽  
Viktor Kudiiarov ◽  
...  
Keyword(s):  
Electron Beam ◽  
Hydrogen Pressure ◽  
Structural Phase ◽  
Phase Evolution ◽  
Gaseous Atmosphere ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ti Powder ◽  
Cp Ti

In this work, a laboratory X-ray diffraction complex for in situ investigations of structural phase evolution of materials under gaseous atmosphere and elevated temperatures was developed. The approbation of the complex was carried out using a commercially pure titanium (CP-Ti) powder, zirconium (Zr-1Nb) alloy and electron beam melted Ti-6Al-4V alloy. It was established that hydrogenation of the CP-Ti powder occurred at a temperature of 500 °C and a hydrogen pressure of 0.5 atm, accompanied by the formation of metastable γ titanium hydride (γ-TiH) phase. The lifetime of the γ-TiH phase was 35–40 min. Decomposition of the γ-TiH occurred after reaching a temperature of 650 °C as a result of the thermally stimulated desorption of hydrogen. The α-Zr → δ-ZrH phase transformation was observed under hydrogenation of the zirconium Zr-1Nb alloy at a temperature of 350 °C and a hydrogen pressure of 0.5 atm. It was revealed that the increase in hydrogenation temperature to 450 °C accelerated this transformation by two times. Hydrogenation of the electron beam melted titanium Ti-6Al-4V alloy at a temperature of 650 °C and hydrogen pressure of 0.5 atm was accompanied by the α → α + β → β + α2 phase transformations.

Structural Evolution of Amorphous Ge2Sb2Te5 Thin Films in the Transition to the Crystalline Phase

2008 ◽  
Vol 1072 ◽  
Author(s):  
Riccardo De Bastiani ◽  
Alberto Maria Piro ◽  
Maria Grazia Grimaldi ◽  
Emanuele Rimini ◽  
Giuseppe Baratta ◽  
...  
Keyword(s):  
Thin Films ◽  
Crystalline Phase ◽  
Short Range ◽  
Structural Modification ◽  
Structural Evolution ◽  
X Ray Diffraction ◽  
Time Resolved ◽  
X Ray ◽  
Kinetics Of

ABSTRACTThe crystallization kinetics of as-deposited amorphous Ge2Sb2Te5 thin films has been measured by in situ time resolved reflectivity. X-ray diffraction and Raman scattering analyses of partially transformed samples allowed to correlate the evolution of the transition to the structural modification in the long and short range configuration. The experimental results evidenced that during the early stages of crystallization there is a reduction of Ge-Te tetrahedral bonds, characteristics of the Ge coordination in amorphous Ge2Sb2Te5 films.

Exploring the rate dependence of phase evolution in P2-type Na2/3Mn0.8Fe0.1Ti0.1O2

2019 ◽  
Vol 7 (19) ◽  
pp. 12115-12125 ◽  
Author(s):  
Damian Goonetilleke ◽  
Sunny Wang ◽  
Elena Gonzalo ◽  
Montserrat Galcerán ◽  
Damien Saurel ◽  
...  
Keyword(s):  
Electrode Material ◽  
High Performance ◽  
Structural Evolution ◽  
Phase Evolution ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
X Ray Diffraction ◽  
X Ray

P2-type Na2/3Mn0.8Fe0.1Ti0.1O2, a promising high-performance electrode material for use in ambient temperature sodium-ion batteries, is examined using operando and long-term in situ synchrotron X-ray diffraction studies to reveal the structural evolution during battery function.

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