PbTiO3을 함유하는 단결정의 제조 방법

• Main Author: ECHIZENYA KAZUHIKO
• Format: Patent
• Language: Korean
• Published: 02.05.2019
• Subjects: AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR; CHEMISTRY; CRYSTAL GROWTH; METALLURGY; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE; REFINING BY ZONE-MELTING OF MATERIAL; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE; SINGLE-CRYSTAL-GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL

단결정의 조성 변동 및 결함 발생을 방지하고, 성장 방향으로 균일한 특성을 갖는 단결정을 수율 좋게 제조하는 것이 가능한 단결정 제조 방법을 제공한다. 수직 브리지맨법에 의해 PbTiO을 함유하는 단결정을 제조하는 단결정 제조 방법에 있어서, 도가니 내에서 융액이 저류된 융액층의 두께를 30mm 이상으로 해서 단결정을 제조한다. Provided is a method for producing a single crystal, wherein compositional variations and defects in the single crystal can be prevented and a single crystal having uniform characteristics in the growth direction can be produced at high yield. In this method for producing a single crystal, a PbTiO3-containing single crystal is produced by the vertical Bridgman technique, wherein the thickness of a melt layer containing the melt in a crucible is at least 30 mm.