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Rapid and Continuous Hydrothermal Crystallization of Metal Oxide Particles in Supercritical Water
Author(s) -
Adschiri Tadafumi,
Kanazawa Katsuhito,
Arai Kunio
Publication year - 1992
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1992.tb04179.x
Subject(s) - supercritical fluid , crystallization , aqueous solution , metal , particle size , chemical engineering , hydrothermal circulation , oxide , materials science , salt (chemistry) , inorganic chemistry , hydrolysis , particle (ecology) , mixing (physics) , hydrothermal synthesis , mineralogy , chemistry , metallurgy , organic chemistry , engineering , oceanography , physics , quantum mechanics , geology
Hydrolysis of 10 metal salt aqueous solutions of 6 metal oxides was conducted in supercritical water. Continuous and rapid production of metal oxide fine particles was achieved by mixing a metal salt aqueous solution with preheated water fed from another line. The reaction time required was less than 2 min. Particle size, morphology, and crystal structure of the obtained metal (hydrous) oxides were examined. Particle size (20 to 600 nm) was different among the systems but the size range was relatively narrow in all the cases.