| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of manufacturing artificial quartz crystal which reduces the inclusion density of an artificial quartz crystal to be manufactured, in a method of manufacturing artificial quartz crystal by a hydrothermal synthesis method, by the invention. SOLUTION: The invention solves the problem for achieving the purpose mentioned above by making the method of manufacturing artificial quartz crystal by the hydrothermal synthesis method characterised in that a plurality of rectangular parallelepiped inorganic substances having rough surfaces are set at arbitrary positions in an autoclave so that the normal vector of the main surfaces of the rectangular parallelepiped inorganic substances is perpendicular to the gravity, and the rectangular parallelepiped inorganic substances consist of an iron-based metal. COPYRIGHT: (C)2006,JPO&NCIPI
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