scholarly journals Crystallization of calcium carbonate (CaCO3) in a flowing system: Influence of Cu2+ additives on induction time and crystalline phase transformation

2016 ◽  
Author(s):  
Y. Usmany ◽  
W. A. Putranto ◽  
A. P. Bayuseno ◽  
S. Muryanto
Keyword(s):  
Phase Transformation ◽  
Calcium Carbonate ◽  
Crystalline Phase ◽  
Induction Time ◽  
Flowing System

scholarly journals Calcium carbonate scales on process equipment: A measure of the induction time for nucleation

2017 ◽  
Vol 69 ◽  
pp. 173-177 ◽  
Author(s):  
G. Mazziotti di Celso ◽  
M. Prisciandaro ◽  
D. Karatza ◽  
A. Lancia ◽  
D. Musmarra
Keyword(s):  
Calcium Carbonate ◽  
Induction Time ◽  
Process Equipment

Phase Transformation of Magnesium Amorphous Calcium Carbonate (Mg-ACC) in a Binary Solution of Ethanol and Water

2012 ◽  
Vol 13 (1) ◽  
pp. 59-65 ◽  
Author(s):  
Yang-Yi Liu ◽  
Jun Jiang ◽  
Min-Rui Gao ◽  
Bo Yu ◽  
Li-Bo Mao ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Calcium Carbonate ◽  
Binary Solution ◽  
Amorphous Calcium Carbonate

Pyridinium salt with crystalline phase transformation under water vapor and reversible mechanochromism luminescent property

2021 ◽  
Author(s):  
Yi Chen ◽  
Xiaoning Li ◽  
Weilong Chi ◽  
Liangjing Tu ◽  
Yujun Xie ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Water Vapor ◽  
Crystalline Phase ◽  
Luminescent Property ◽  
Pyridinium Salt ◽  
Photophysical Property ◽  
Pyridine Derivative ◽  
Molecular Configuration

Photophysical property of organic aggregate is heavily affected by molecular configuration and intermolecular packing modes. Herein, organic pyridinium salt is synthesized by quaternization of pyridine derivative, and the resultant CPBBr...

Crystalline phase transformation of colloidal cadmium sulfide nanocrystals

2017 ◽  
Vol 31 (06) ◽  
pp. 1750037
Author(s):  
M. Ghali ◽  
A. M. Eissa ◽  
M. M. Mosaad
Keyword(s):  
Phase Transformation ◽  
Optical Absorption ◽  
Crystalline Phase ◽  
Growth Conditions ◽  
Cubic Phase ◽  
X Ray Diffraction ◽  
Solution Ph ◽  
X Ray ◽  
Ph Values ◽  
Transmission Electron

In this paper, we give a microscopic view concerning influence of the growth conditions on the physical properties of nanocrystals (NCs) thin films made of CdS, prepared using chemical bath deposition CBD technique. We show a crystalline phase transformation of CdS NCs from hexagonal wurtzite (W) structure to cubic zincblende (ZB) when the growth conditions change, particularly the solution pH values. This effect was confirmed using X-ray diffraction (XRD), transmission electron microscopy (TEM), optical absorption and photoluminescence (PL) measurements. The optical absorption spectra allow calculation of the bandgap value, [Formula: see text], where significant increase [Formula: see text]200 meV in the CdS bandgap when transforming from Hexagonal to Cubic phase was found.

Analysis of the crystalline phase transformation of poly(vinylidene fluoride)

1985 ◽  
Vol 18 (12) ◽  
pp. 2583-2587 ◽  
Author(s):  
S. L. Hsu ◽  
F. J. Lu ◽  
D. A. Waldman ◽  
M. Muthukumar
Keyword(s):  
Phase Transformation ◽  
Crystalline Phase ◽  
Vinylidene Fluoride ◽  
Poly Vinylidene Fluoride

The effects of organic additives on induction time and characteristics of precipitated calcium carbonate

2010 ◽  
Vol 88 (11) ◽  
pp. 1450-1454 ◽  
Author(s):  
Raluca Isopescu ◽  
Carmencita Mateescu ◽  
Mihaela Mihai ◽  
Gabriel Dabija
Keyword(s):  
Calcium Carbonate ◽  
Induction Time ◽  
Organic Additives ◽  
Precipitated Calcium Carbonate

scholarly journals CALCIUM OXIDE CHARACTERISTICS PREPARED FROM AMBUNTEN’S CALCINED LIMESTONE

2018 ◽  
Vol 5 (1) ◽  
pp. 65 ◽  
Author(s):  
Fatimatul Munawaroh ◽  
Laila Khamsatul Muharrami ◽  
Triwikantoro Triwikantoro ◽  
Zaenal Arifin
Keyword(s):  
Calcium Carbonate ◽  
Chemical Composition ◽  
Calcium Oxide ◽  
Crystalline Phase ◽  
Wave Number ◽  
Test Results ◽  
X Ray Diffraction ◽  
X Ray ◽  
Oxide Characteristics

<pre>Calcium oxide (CaO) and calcium carbonate (CaCO3) are widely used in industry. CaO and CaCO3 can be synthesized or derived from limestone. The purpose of this study to determine the characteristics of CaO calcined limestone from Ambunten Sumenep. Lime in calcined at 850 ° C for 6 hours. Characterization of X-ray fluorescence (XRF) was conducted to determine the chemical composition of limestone, X-ray diffraction test (XRD) to find the lime crystalline phase and FTIR test to determine the absorption of wave number. XRF test results showed that the limestone chemical composition consisted of Ca of 95.37% as the dominant element, Mg of 4.1%, Fe 0.17% and Y by 0.39%. The XRD test results showed that the limestone crystal phase is ankerite (Ca [Fe, Mg] [CO3] 2) and after the calcined phase calcination is vaterite (Ca [OH] 2), calcite (CaO) and calcite (CaCO3). While the FTIR test results show that the CaO spectra are seen at 3741.24, 1417.12 and 874.14 cm</pre><sup>-1</sup><pre>.</pre>

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