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Crystals 2017, 7(4), 118; doi:10.3390/cryst7040118

Study on Micro Morphology of Potassium Dihydrogen Phosphate Crystals Grown at Elevated Temperatures

1
State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
2
Key Laboratory of Functional Crystal Materials and Device (Shandong University), Ministry of Education, Jinan 250100, China
3
College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China
*
Author to whom correspondence should be addressed.
Academic Editor: Helmut Cölfen
Received: 7 March 2017 / Revised: 7 April 2017 / Accepted: 18 April 2017 / Published: 21 April 2017
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Abstract

Potassium dihydrogen phosphate crystals were grown around 65 °C. The growth rate of KDP (KH2PO4) crystal prismatic faces was measured by laser polarization interference system. The surface micro morphology of KDP crystals grown at various supersaturation were comparatively observed by atomic force microscope systematically. The results show that the growth rate increased with the rise of supersaturation, the aspect ratio reduced. The steps bunching height occurred at σ = 0.03 and 0.04. At this point, the steps height reached maximum value about 11.3~24.4 nm. The step bunching was almost constant at higher supersaturation. A few pits and holes appeared on the crystal surface at high supersaturation. In our opinion, the forming of these pits and holes might be related with the step movement and 2D nuclei mechanism. View Full-Text
Keywords: elevated temperature; growth rate; AFM; KDP crystal elevated temperature; growth rate; AFM; KDP crystal
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Li, W.; Wang, S.; Ding, J.; Yu, G.; Wang, D.; Huang, P.; Liu, H.; Gu, Q.; Xu, X. Study on Micro Morphology of Potassium Dihydrogen Phosphate Crystals Grown at Elevated Temperatures. Crystals 2017, 7, 118.

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