High-temperature stability of the phase composition of langasite family crystals

Growth of high-quality langatate crystals by the Czochralski method with elimination of Ga2O3 volatilization

“…11 Three phases, LaGaO 3 , LaTaO 4 , and Ga 2 O 3 are reported to coexist with LGT, and Ga 2 O 3 is easily decomposed during the heating step under a low oxygen content atmosphere. 12 The evaporation of Ga 2 O 3 disrupts the mass transport from hot to cold zones during the growth process, inhibiting the preparation of high-quality large-size LGT. 13 Thus, an excess of Ga 2 O 3 is commonly added in the raw materials to compensate the evaporation loss of this oxide.…”