Fabrication of nanopowders by high energy ball milling and low temperature sintering of Mg2SiO4 microwave dielectrics

Fabrication of nanopowders by high energy ball milling and low temperature sintering of Mg2SiO4 microwave dielectrics
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Mg2SiO4微波介质的高能球磨和低温烧结制备纳米粉末

DOI:
10.1016/j.jallcom.2011.10.051
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发表时间:
2012-02
影响因子:
6.2
通讯作者:
HuaiWu Zhang
HuaiWu Zhang
中科院分区:
材料科学2区
文献类型:
--
作者:
Lin Cheng;Peng Liu;XiaoMing Chen;HuaiWu Zhang

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以氧化镁和二氧化硅混合物为原料,采用高能球磨结合低温焙烧的方法制备了纳米二氧化镁粉末。球磨30h后,在850℃下可得到平均粒径为147.4 nm的纯纳米晶,比传统的固相反应所需的温度低300℃。在1075℃的低温下烧结的Mg2SiO4陶瓷具有几乎全密度和优异的微波介电性能(ɛr=7.2q×f=193,800 GHz,τf=−58ppm/°C)。
Mg2SiO4nanopowders were prepared from MgO and SiO2mixtures by using a high energy ball milling method, combined with subsequent calcination at low temperatures. After milling for 30h, pure phase Mg2SiO4nanopowders with an average grain size of 147.4nm were obtained at 850°C, 300°C lower than that required by a conventional solid state reaction process. Mg2SiO4ceramics sintered at a low temperature of 1075°C showed almost full density and excellent microwave dielectric properties (ɛr=7.2, Q×f=193,800GHz, τf=−58ppm/°C).
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