标题：Hydrothermal synthesis of magnetite: investigation of influence of aging time and mechanism
作者：Sun, Xiaoning;Sun, Kangning;Liang, Yanjie
作者机构：[Sun, X] Key Lab. for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan, 250061, China 更多
通讯作者地址：[Sun, XN]Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jinan 250061, Peoples R China.
来源：Micro & nano letters
关键词：iron compounds;crystal growth from solution;powders;ageing;surface morphology;particle size;magnetisation;ferromagnetic materials;magnetic particles;hydrothermal synthesis;magnetite;aging time;mechanism research;ethylene glycol solvent;morphology;iron hydroxide powders;spherical shapes;particle size;specific saturation magnetisation;time 1 h to 10 h;Fe3O4
摘要：Magnetite (Fe3O4) particles are prepared by a hydrothermal method using ethylene glycol as the solvent. Aging time is a very important factor in the reaction process. The properties and morphology of the products with different aging times are investigated. In the initial stage of the reaction (1 and 2 h), the main powders were iron hydroxides. Fe3O4 particles generated (3 h) and grew into spherical shapes (4-10 h) with the extended aging time. The particle size and the specific saturation magnetisation also varied with aging time. By analysing the powders and the liquids during the reaction, a probable mechanism is studied.