The growth of ruby single crystals | Zendy

Aleksandar Golubović | Zendy; Slobodanka Nikolic | Zendy; Stevan W. Djurić | Zendy; Andreja Valcic | Zendy

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The growth of ruby single crystals

Author(s) -

Aleksandar Golubović,

Slobodanka Nikolic,

Stevan W. Djurić,

Andreja Valcic

Publication year - 2005

Publication title -

journal of the serbian chemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.227

H-Index - 45

eISSN - 1820-7421

pISSN - 0352-5139

DOI - 10.2298/jsc0501087g

Subject(s) - polishing , materials science , argon , diffraction , czochralski method , single crystal , crystal growth , powder diffraction , analytical chemistry (journal) , crystallography , chemistry , optics , metallurgy , physics , organic chemistry , chromatography

Ruby (Cr:Al2O3) single crystals were grown by the Czochralski technique in an argon atmosphere. The critical crystal diameter dc = 1.0 cm and the critical rate of ro- tation c = 20 rpm were calculated by equations of the hydrodynamics of the melt. The rate of crystal growth was experimentally obtained to be 2.7 mm/h. For chemical polish- ing, conc. H3PO4 at 593 K for an exposure of 3 hours was determined. Conc. H3PO4 at 523 K for an exposure of 3 h was found to be a suitable etching solution. The lattice pa- rameters a = 0.47627(6) nm and c = 1.301(1) nm were determined by X-ray powder dif- fraction. The obtained results are discussed and compared with published data.

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