On the Design of Double-Ellipsoid Mirror Furnace and its Thermal Characteristics for Floating-Zone Growth of SrxBa1-xTiO3 Single Crystals

• Published in: Crystal research and technology (1979) Vol. 35; no. 2; pp. 167 - 176
• Main Authors: Lan, C.W., Leu, J.C., Huang, Y.
• Format: Journal Article
• Language: English
• Published: Berlin WILEY-VCH Verlag Berlin GmbH 01.02.2000; WILEY‐VCH Verlag Berlin GmbH; Wiley-VCH
• Subjects: Cross-disciplinary physics: materials science; rheology; crystal growth; Exact sciences and technology; furnace design; Growth from melts; zone melting and refining; Materials science; Methods of crystal growth; physics of crystal growth; mirror furnace; Physics; temperature distribution; Thermal characteristic; Inorganic compounds; Instrumentation; Barium titanates; Floating zone; Experimental study; Monocrystals; Ovens; Solid solutions; Strontium titanates; Mirrors; Quaternary compounds; Crystal growth from melts
• ISSN: 0232-1300; 1521-4079
• DOI: 10.1002/(SICI)1521-4079(200002)35:2<167::AID-CRAT167>3.0.CO;2-9

We have designed a double ellipsoid mirror furnace for floating‐zone crystal growth using lamps with rectangular filaments. Its thermal characteristics were studied using an alumina tube for several system configurations. A simple comparison with a commercial furnace that used cylinder lamps for the heating profile was also conducted. By adjusting lamp orientation and positions, one could modify heating profiles easily. In general, the thermal characteristics of the furnace were consistent with the model's prediction [J. Crystal Growth 173 (1997) 561]. The effects of growth chamber and heat pipe were further illustrated. Furthermore, a suitable system configuration leading to better heating uniformity and lower thermal gradients near the growth interface was found for the floating‐zone growth of SrxBa1‐xTiO3 single crystals.