High Single-Crystal Conversion of [110]-Oriented Pb(Mg1/3Nb2/3)O3-0.37PbTiO3 Single Crystal Grown by Solid-State Crystal Growth Method

The solid-state crystal growth (SSCG) method possesses significant advantages in the field of crystal growth due to its low cost, straightforward process, and uniform composition of the as-grown single crystals. However, the limited size of single crystals grown by using the SSCG method restricts its broader application. In this work, the strategy of changing the seed crystal cutting pattern to improve the conversion rate of single crystal growth was proposed, and 0.63Pb(Mg_1/3Nb_2/3)O₃-0.37PbTiO₃ (PMN-0.37PT) single crystals were successfully grown by the SSCG method. According to the basic principles of the Kossel–Stranski theory, the growth models of seed crystals obtained by two different seed crystal cutting methods were established and the growth process of single crystals was theoretically analyzed. The experimental results are in agreement with the theoretical analyses, and the single crystals grown by the improved seed crystal cutting method on the same thickness matrix are larger in size. The corresponding conversion rates were also calculated, and the conversion rate corresponding to the largest single crystal grown using the improved seed crystal cutting method increased by 47%. The conversion rates of single crystals are improved by changing the cutting method without altering the size of the seed crystals. It provides a new research direction for obtaining large-size single crystals by the SSCG method.