Kinetics and Mechanism of the Low-Cubic to Hexagonal Phase Transformation of Silver Iodide1

1964 ◽  
Vol 68 (5) ◽  
pp. 1111-1114 ◽  
Author(s):  
Gordon Burley
Keyword(s):  
Phase Transformation ◽  
Hexagonal Phase ◽  
Kinetics And Mechanism

Stress-Induced Cubic-to-Hexagonal Phase Transformation in Perovskite Nanothin Films

Nano Letters ◽  
2017 ◽  
Vol 17 (8) ◽  
pp. 5148-5155 ◽  
Author(s):  
Shi-Gu Cao ◽  
Yunsong Li ◽  
Hong-Hui Wu ◽  
Jie Wang ◽  
Baoling Huang ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Hexagonal Phase

Thin films of praseodymium sesquioxide: Martensitic character of the monoclinic to hexagonal phase transformation

1971 ◽  
Vol 34 (7) ◽  
pp. 437-438 ◽  
Author(s):  
C. Boulesteix ◽  
P.-E. Caro ◽  
M. Gasgnier ◽  
Ch.H. La Blanchetais ◽  
G. Schiffmacher
Keyword(s):  
Thin Films ◽  
Phase Transformation ◽  
Hexagonal Phase

Synthesis and phase transformation of NaGdF4:Yb–Er thin films using electro-deposition method at moderate temperatures

CrystEngComm ◽  
2018 ◽  
Vol 20 (43) ◽  
pp. 6919-6924 ◽  
Author(s):  
Hong Jia ◽  
Yiping Zhou ◽  
Xue Li ◽  
Yan Li ◽  
Weiying Zhang ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Phase Transformation ◽  
Hexagonal Phase ◽  
Deposition Method ◽  
Electro Deposition

Herein, a thin film of hexagonal-phase NaGdF4:Yb–Er is fabricated by electro-deposition at moderate temperatures. The phase of NaGdF4:Yb–Er thin film can be controlled by adding PVP in the electrolyte.

Influence of Cubic-to-Hexagonal-Phase Transformation on the Uniformity of NaLnF4 (Ho, Tb, Eu, Sm) Nanoparticles

2019 ◽  
Vol 31 (23) ◽  
pp. 9742-9749
Author(s):  
Elsa Lu ◽  
Jothirmayanantham Pichaandi ◽  
Chandresh Kumar Rastogi ◽  
Loryn P. Arnett ◽  
Mitchell A. Winnik
Keyword(s):  
Phase Transformation ◽  
Hexagonal Phase

Kinetics and mechanism of anatase-to-rutile phase transformation in the presence of borosilicate glass

1999 ◽  
Vol 14 (7) ◽  
pp. 2922-2928 ◽  
Author(s):  
Jau-Ho Jean ◽  
Shih-Chun Lin
Keyword(s):  
Phase Transformation ◽  
Borosilicate Glass ◽  
Rutile Phase ◽  
Kinetics And Mechanism ◽  
Avrami Equation ◽  
Two Dimensional ◽  
Transformation Kinetics ◽  
Controlling Mechanism ◽  
Particle Coalescence ◽  
Kinetics Of

The effects of borosilicate glass (BSG) on the kinetics and mechanism of anataseto- rutile phase transformation have been investigated. The displacive anatase-to-rutile phase transformation kinetics of TiO2 were greatly enhanced in the presence of BSG. The transformation kinetics followed the Avrami equation, and the results showed an apparent activation energy of 260–370 kJ/mol, which was close to the bond strength of Ti–O, suggesting a reaction-controlling mechanism. The values of the Avrami exponent were in the range of 1.4–2.3, which could be interpreted as two-dimensional reaction-controlled growth at zero nucleation rate. The rutile particles obtained by the phase transformation were always much larger than the starting anatase powders, which was explained by a mechanism of phase-transformation–induced particle coalescence.

Restitution conditions of the parent cubic texture from the inherited hexagonal texture in the β–α phase transformation

1999 ◽  
Vol 32 (1) ◽  
pp. 21-26 ◽  
Author(s):  
Michel Humbert ◽  
Nathalie Gey
Keyword(s):  
Phase Transformation ◽  
Distribution Function ◽  
Correlation Function ◽  
Room Temperature ◽  
Hexagonal Phase ◽  
Parent Phase ◽  
Orientation Distribution ◽  
Variant Selection ◽  
Qualitative Information ◽  
Α Phase

Different factors calculated from theCcoefficients of the inherited orientation distribution function (ODF) allow us to check the importance of the variant selection. When no variant selection or a slight variant selection occurs by the cubic-to-hexagonal phase transformation, it is possible to calculate the ODF of the cubic parent phase present at high temperature from the ODF of the inherited hexagonal phase at room temperature. When a stronger variant selection occurs, qualitative information about the parent ODF can be obtained by using a specific correlation function, which we have named R(g).

scholarly journals Control of morphology in synthesizing mesoporous silica

2000 ◽  
Vol 72 (1-2) ◽  
pp. 137-146 ◽  
Author(s):  
Chung-Yuan Mou ◽  
Hong-Ping Lin
Keyword(s):  
Phase Transformation ◽  
Liquid Crystal ◽  
Nitric Acid ◽  
Mesoporous Silica ◽  
Hexagonal Phase ◽  
Silicate Liquid ◽  
Morphological Transformation ◽  
Liquid Crystal System ◽  
Surfactant Composition ◽  
Morphological Transformations

Mesoporous silica can be synthesized by either the alkaline route or the acidic route, both using surfactants as templates. Morphological transformations of mesoporous silica can produce various hierarchical orders. Different morphologies are produced under different synthetic conditions. In the alkaline route, the surfactant/silicate liquid crystal system undergoes phase transformation to form vesicles and further transforms to the hexagonal phase. The results are tubule-within-tubule and hollow pillar-within-sphere structures depending on cosurfactant/surfactant composition. Using nitric acid in the acidic route, one can obtain hierarchical ropes or gyroids depending on stirring conditions. Ammonia hydrothermal treatment can induce further morphological transformation to nanotubes of mesoporous silica.

The high temperature orthorhombic ⇄ hexagonal phase transformation of FeMnP

1987 ◽  
Vol 64 (1) ◽  
pp. 57-61 ◽  
Author(s):  
B. Chenevier ◽  
J.L. Soubeyroux ◽  
M. Bacmann ◽  
D. Fruchart ◽  
R. Fruchart
Keyword(s):  
Phase Transformation ◽  
High Temperature ◽  
Hexagonal Phase
Sign in / Sign up

Export Citation Format

Share Document