Surface micromorphology and dissolution kinetics of potassium dihydrogen phosphate (KDP) crystals in undersaturated aqueous solutions

1988 ◽  
Vol 23 (8) ◽  
pp. 2989-2994 ◽  
Author(s):  
A. Koziejowska ◽  
K. Sangwal
Keyword(s):  
Aqueous Solutions ◽  
Potassium Dihydrogen Phosphate ◽  
Dissolution Kinetics ◽  
Dihydrogen Phosphate ◽  
Potassium Dihydrogen ◽  
Surface Micromorphology ◽  
Kinetics Of ◽  
Kdp Crystals

Kinetics of Potassium Dihydrogen Phosphate Single-Crystal Growth Mapped by the Chemical Bond Simulation

2012 ◽  
Vol 554-556 ◽  
pp. 31-34 ◽  
Author(s):  
Xu Zhang ◽  
De Xiang Jia
Keyword(s):  
Chemical Bond ◽  
Crystal Morphology ◽  
Potassium Dihydrogen Phosphate ◽  
Dihydrogen Phosphate ◽  
Chemical Bonds ◽  
Potassium Dihydrogen ◽  
Solution Interface ◽  
Shape Controlled ◽  
Kinetics Of ◽  
Kdp Crystals

A chemical bond simulation was proposed to quantitatively calculate the growth rate from the kinetic model of the crystal-solution interface. When this approach was applied to the cases of potassium dihydrogen phosphate (KDP) crystals grown from the solution with different surpersaturation, the growth behaviors of KDP crystals were predicted and the calculated results were consistent with the experimental data. These results demonstrate that regulating the distribution of the chemical bonds between the crystal and solution interfaces can effectively control the crystal morphology. Seeding experiments with the chemical bond simulation may have significant potential towards the development of shape-controlled growth with defined conditions.

scholarly journals Effect of cyclohexane diamine tetraacetic acid on micro morphology of rapidly grown potassium dihydrogen phosphate crystals

RSC Advances ◽  
2017 ◽  
Vol 7 (37) ◽  
pp. 23102-23108
Author(s):  
Weidong Li ◽  
Shenglai Wang ◽  
Guangwei Yu ◽  
Duanliang Wang ◽  
Pingping Huang ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Rapid Growth ◽  
Potassium Dihydrogen Phosphate ◽  
Dihydrogen Phosphate ◽  
Tetraacetic Acid ◽  
Growth Technique ◽  
Potassium Dihydrogen ◽  
Micro Morphology ◽  
Kdp Crystals ◽  
Point Seed

Potassium dihydrogen phosphate (KDP) crystals were grown from aqueous solutions with different concentrations of cyclohexane diamine tetraacetic acid (CDTA) by the “point seed” rapid growth technique.

scholarly journals GROWTH MECHANISM OF KDP CRYSTALS FROM AQUEOUS SOLUTIONS

2017 ◽  
Vol 8 (2) ◽  
Author(s):  
Biljana Maksimović ◽  
Branislava Misailović ◽  
Mićo Mitrović ◽  
Andrijana Žekić
Keyword(s):  
Crystal Growth ◽  
Aqueous Solutions ◽  
Growth Mechanism ◽  
Potassium Dihydrogen Phosphate ◽  
Dihydrogen Phosphate ◽  
Growth Mechanisms ◽  
Potassium Dihydrogen ◽  
Temperature Range ◽  
Growth History ◽  
Kdp Crystals

The results of the effect of the growth history on Potassium Dihydrogen Phosphate (KDP) crystals growth mechanism are presented in the paper. Crystals were grown in temperature range of from aqueous solutions, saturated at . Two types of the experiments were performed. In both types, after the nucleation at crystals were grown at the same temperature for about 1.5 hour and then dissolved at temperature for about 15 min. After refaceting, in the first type, the crystal growth started at , followed by the temperature increasing in steps of to . In the second type, after refaceting the crystal growth started at , followed by the temperature decreasing in steps of to . Obtained results indicate that KDP crystals growth mechanisms do not depend on growth history. They are discussed in accordance with the current theories.

scholarly journals The Strain Rate Sensitivity and Creep Behavior for the Tripler Plane of Potassium Dihydrogen Phosphate Crystal by Nanoindentation

Micromachines ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 369
Author(s):  
Jianhui Mao ◽  
Wenjun Liu ◽  
Dongfang Li ◽  
Chenkai Zhang ◽  
Yi Ma
Keyword(s):  
Strain Rate ◽  
Strain Rate Sensitivity ◽  
Creep Deformation ◽  
Potassium Dihydrogen Phosphate ◽  
Rate Sensitivity ◽  
Dislocation Nucleation ◽  
Machining Process ◽  
Dihydrogen Phosphate ◽  
Potassium Dihydrogen ◽  
Kdp Crystals

As an excellent multifunctional single crystal, potassium dihydrogen phosphate (KDP) is a well-known, difficult-to-process material for its soft-brittle and deliquescent nature. The surface mechanical properties are critical to the machining process; however, the characteristics of deformation behavior for KDP crystals have not been well studied. In this work, the strain rate effect on hardness was investigated on the mechanically polished tripler plane of a KDP crystal relying on nanoindentation technology. By increasing the strain rate from 0.001 to 0.1 s−1, hardness increased from 1.67 to 2.07 GPa. Hence, the strain rate sensitivity was determined as 0.053, and the activation volume of dislocation nucleation was 169 Å3. Based on the constant load-holding method, creep deformation was studied at various holding depths at room temperature. Under the spherical tip, creep deformation could be greatly enhanced with increasing holding depth, which was mainly due to the enlarged holding strain. Under the self-similar Berkovich indenter, creep strain could be reduced at a deeper location. Such an indentation size effect on creep deformation was firstly reported for KDP crystals. The strain rate sensitivity of the steady-state creep flow was estimated, and the creep mechanism was qualitatively discussed.

Sign in / Sign up

Export Citation Format

Share Document