Features of beryllium aluminate crystal growth by the method of horizontally oriented crystallization

Specific character of melt growth of low-temperature phase of aluminum beryllate

“…2). A possible explanation of this phenomenon is provided by physical modeling of heatmass exchange during crystal growth by the HOC method [9,10]. It was revealed that the features of thermal field (Fig.…”

“…Powder of Cr 2 O 3 or V 2 O 3 oxide of the same purity was used as an admixture doping the crystalline matrix of a-ABO. Some details of synthesis procedures were described elsewhere [2,9]. To grow crystals by the Czochralski method, we used standard equipment with induction heating, iridium crucibles, and argon protective atmosphere [2,8].…”

“…To grow crystals by the Czochralski method, we used standard equipment with induction heating, iridium crucibles, and argon protective atmosphere [2,8]. Growth of crystals by the HOC method was carried out on specially devised equipment with a resistive tungsten heater in boat-type molybdenum containers and high-purity argon atmosphere [9]. In that work we also reported the main characteristics of thermal field in the zone of heating of crystallization device and crystallization zone, which are important for understanding of the crystallization features discussed below.…”

“…But only the Czochralski crystal-growth technique [2,8] and horizontally oriented crystallization (HOC) [9] yielded crystals of the size and quality appropriate for practical use. The task solution of growing big monocrystals revealed some important features of seeding and growing a-ABO crystals, including those governed by the equipment, thermal field, temperature and time conditions of melt preparation for crystallization, doping, etc.…”

“…In view of unusual details of the HOC procedure [9] as well as its commercially advantageous but still limited application, this method will be of our primary consideration. …”