Synthesis of fine magnetite powder using reverse coprecipitation method and its heating properties by applying AC magnetic field
Synthesis of fine magnetite powder using reverse coprecipitation method and its heating properties by applying AC magnetic field
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DOI：
10.1016/j.materresbull.2005.03.014
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发表时间：
2005-07
影响因子：
5.4
通讯作者：
H. Aono;H. Hirazawa;T. Naohara;T. Maehara;H. Kikkawa;Y. Watanabe
中科院分区：
文献类型：
--
作者：
H. Aono;H. Hirazawa;T. Naohara;T. Maehara;H. Kikkawa;Y. Watanabe
采用反向共沉淀法制备了局部热凝治疗用纳米FeFe2O4铁氧体粉体。反相共沉淀法制备的样品的晶粒直径小于正相共沉淀法制备的样品的晶粒直径。两种方法的晶体直径都随着合成温度的升高而增大。在交流磁场作用下，晶体的最大温升在12nm左右。FeFe2O4粉末通过在环境空气中在600°C下煅烧而氧化成Fe2O3。加热能力主要取决于磁滞损耗值。虽然新鲜FeFe2O4样品在交流磁场下的温升与商品化MgFe2O4粉末的温升非常接近，但FeFe2O4样品在环境空气中的温升随时间逐渐降低。
Nano-sized FeFe2O4ferrite powder for local thermal coagulation therapy was synthesized by a reverse coprecipitation method. The crystal diameter for the samples from the reverse coprecipitation method was smaller than that from a normal coprecipitation method. The crystal diameter increased with an increase in the synthesized temperature for both methods. The maximum increasing temperature under the AC magnetic field was at around a 12nm crystal diameter. The FeFe2O4powder was oxidized to Fe2O3by calcination at 600°C in ambient air. The heating ability almost depended on the hysteresis loss value. Although the increased temperature under the AC magnetic field for the fresh FeFe2O4sample was very close to that for the commercialized MgFe2O4powder, it was gradually decreased for FeFe2O4with time in ambient air.