Ln2Mo3O12 (Ln = La, Nd): A novel group of low loss microwave dielectric ceramics with low sintering temperature
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Li-Xia Panga, b, , , Guo-Bin Suna and Di Zhoub
Received 11 August 2010;
accepted 23 September 2010.
Available online 30 September 2010.
Abstract
Ln2Mo3O12 (Ln = La, Nd) ceramics with a defect scheelite related structure were prepared via a solid state reaction method. The La2Mo3O12 ceramics sintered at 930 °C for 2 h exhibited a low dielectric permittivity of 10.1, a high quality factor (Qf value) of 60,000 GHz and a temperature coefficient of −80 ppm/°C at 12.7 GHz. The Nd2Mo3O12 ceramics sintered at 945 °C for 2 h possessed a dielectric permittivity of 8.2, a Qf value of 80,000 GHz, and a temperature coefficient of −60 ppm/°C at 15.8 GHz. This group of ceramics could be good candidates for microwave substrate applications.