Journal article
(Original article)


Determination of GaN solubility in supercritical ammonia with NH4F and NH4Cl mineralizer by in situ x-ray imaging of crystal dissolution


Publication Details
Author(s): Schimmel S, Lindner M, Steigerwald T, Hertweck B, Richter TMM, Künecke U, Alt N, Niewa R, Schlücker E, Wellmann P
Publisher: Elsevier
Publication year: 2015
Volume: 418
Pages range: 64-69
ISSN: 0022-0248

Abstract

Quantitative data on the solubility of GaN in supercritical ammonia using NHF as mineralizer are reported. The solubility is determined by in situ x-ray imaging of the dissolution of GaN single crystals. First, solubility values obtained by this method with NHCl as mineralizer are presented and discussed with respect to existing literature data. Monitoring the dissolution process in situ reveals the time when the solubility limit is reached. Thus, it allows to distinguish the saturation of the solution from dissolution based on mass transport and deposition. This is a key advantage of solubility measurements by in situ x-ray imaging compared to gravimetric methods. Our results indicate that the solubility limit is reached much faster than usually assumed in gravimetric solubility studies and the solubility of GaN in ammonothermal media is significantly lower than reported so far.



How to cite
APA: Schimmel, S., Lindner, M., Steigerwald, T., Hertweck, B., Richter, T.M.M., Künecke, U.,... Wellmann, P. (2015). Determination of GaN solubility in supercritical ammonia with NH4F and NH4Cl mineralizer by in situ x-ray imaging of crystal dissolution. Journal of Crystal Growth, 418, 64-69. https://dx.doi.org/10.1016/j.jcrysgro.2015.02.020

MLA: Schimmel, Saskia, et al. "Determination of GaN solubility in supercritical ammonia with NH4F and NH4Cl mineralizer by in situ x-ray imaging of crystal dissolution." Journal of Crystal Growth 418 (2015): 64-69.

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