Stability of Ba(B0.9Al0.1)2O4 molten zone by floating-zone technique on the ground

Growth and luminescence characteristics of cerium-doped yttrium pyrosilicate single crystal

“…As Fz method can conveniently provide a large degree of supercooling through a relative fast growth rate [20] and a relative long melting zone [21]. It has been successfully used to grow the incongruently melting compound KNbO 3 single crystal [22]. Thanks to the large surface tension and large viscosity of YPS, its melting zone will be stable even though its length is relative long.…”

Potential Advantage of Multiple Alkali Metal Doped KNbO3 Single Crystals

“…However, the levitation technique is adequate only for a single experiment, and continuous crystal growth by the levitation technique is impossible. On the other hand, crystallization without using a container can be carried out using a molten zone method by a modified floating zone (Fz) technique [19,20]. Figure 2 shows schematic drawings of this technique [15].…”

“…Usually, reduced gravity condition is necessary for this purpose because it is difficult to form a long and stable molten zone under the normal gravity conditions on earth. Here in our laboratory we developed a procedure for containerless-crystallization using a modified Fz technique to form a long and stable molten zone [19] and we succeeded in carrying out the KN crystallization at the lower part of the molten zone under normal gravity conditions [20]. The most important point is that continuous crystal growth is possible using the firstly formed crystal as the seed by comparison with the levitation technique.…”

“…The Pt tubes used in this setup were without rotation. A Pt rod was mounted at the end of the Pt tube as a stopper to prevent any motion of the melt from capillary action [19]. With regards to the stability of the molten zone, a relationship has already been studied and established between the V = D 3 av and the L/D av , where D av is the average diameter of the upper and the lower Pt tubes, and L and V are the length and the volume of the molten zone, respectively [19].…”

“…A Pt rod was mounted at the end of the Pt tube as a stopper to prevent any motion of the melt from capillary action [19]. With regards to the stability of the molten zone, a relationship has already been studied and established between the V = D 3 av and the L/D av , where D av is the average diameter of the upper and the lower Pt tubes, and L and V are the length and the volume of the molten zone, respectively [19]. Accordingly, the pair of Pt tubes with 2.0 mm diameter for the lower and 4.0 mm diameter for the upper was found to be effective in forming a long and stable molten zone [20].…”