Low-Dielectric Loss Characteristics of Nd(Co1/2Ti1/2)O3 Ceramics at Microwave Frequencies |
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| Authors: | Ching-Fang Tseng Cheng-Liang Huang Cheng-Hsing Hsu |
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| Affiliation: | Department of Electrical Engineering, National Cheng Kung University, Tainan 70101, Taiwan; Department of Electrical Engineering, National United University, Miao-Li 36003, Taiwan |
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| Abstract: | The microwave dielectric properties and the microstructures of Nd(Co1/2Ti1/2)O3 (NCT) ceramics using starting powders of Nd2O3, CoO, and TiO2 prepared by the conventional solid-state route have been researched. The dielectric constant values (?r) saturated at 24.8–27. Quality factor ( Q × f ) values of 37 900–140 000 (at 9 GHz) and the measured τf values ranging from ?45 to ?48 ppm/°C can be obtained when the sintering temperatures are in the range of 1410°–1500°C. The ?r value of 27, the Q × f value of 140 000 (at 9 GHz) and the τf value of ?46 ppm/°C were obtained for NCT ceramics sintered at 1440°C for 4 h. For applications of high selective microwave ceramic resonator, filter, and antenna, NCT is proposed as a suitable material candidate. |
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