METHOD AND DEVICE FOR PRODUCING INORGANIC POWDER BY HYDROTHERMAL SYNTHESIS

摘要

PURPOSE:To excellently agitate a reactant in the hydrothermal reaction and to increase the reaction rate by hermetically enclosing a small-piece agitating medium in a pressurized reaction vessel, rotating and agitating the vessel. CONSTITUTION:The inner vessel 2 contg. a bottomed inner cylinder 21 charged with distilled water and a reactor is placed in the bottomed outer cylinder 11 of the outer vessel 1. A pressing member 3 is placed on an inner lid 22. The outer lid 12 screwed into a pressing member 4 is screwed into the outer cylinder 11 and bound. The head 42 of the pressing member 4 is rotated clockwise, and its tip 41 is pressed on the pressing member 3. Consequently, the inner lid 22 is pressed vertically on the inner cylinder 21 by the pressing force, the seating face 23 of the inner cylinder 21 is closely attached to the matching face 24 of the inner lid 22, and the inner vessel 2 is liquid-tightly closed. The pressurized reaction vessel 31 thus prepared is horizontally placed on a couple of rotation transmitting rods 10, kept at a constant temp. and rotated. Alumina and quartz are exemplified as the material for the small-piece agitating medium inert to the hydrothermal reaction.