Effect of Glass Addition on Microwave Properties of BaO・La_2O_3・4.7TiO_2

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概要

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• The effects of the addition of glass to the microwave properties of BaO・La_2O_3・4.7TiO_2 ceramics were investigated. Three commercial glasses: PbO-B_2O_3-SiO_2 (GA9), ZnO-B_2O_3-SiO_2 (GP032) and PbO-B_2O_3 (LS3081), were investigated in this study. The ceramics without glass addition and sintered at 1300℃ gave the relative dielectric constant ε_r = 92, quality factor Q = 1653 and temperature coefficient of resonant frequency τ_f = 40.3 ppm/℃ at 3.0 GHz. With 20 wt% GA9 addition, highly dense samples (void fraction were ≤ 2.5 vol%) were obtained at T_s ≥ 900℃ and their microwave properties were: ε_r ≥ 64, Q ≥ 1037 and τ_f ≤ 15.3 ppm/℃ at 3.0 GHz. The high sintering temperature increased ε_r and Q values but decreased the value of τ_f. The densification of specimens was found to play an important role in improving the dielectric constant. Heterogeneous interfaces and the dissolution of trace amounts of ceramics in glass increased the dielectric loss significantly; also, the former increased τ_f whereas the latter decreased it.

• 社団法人応用物理学会の論文
• 1998-11-15

著者

• Lin Pang

  Institute Of Materials Science And Engineering National Chiao Tung University

• Lee Cheng

  Institute Of Materials Science And Engineering National Chiao Tung University

• Li Pang

  Institute of Materials Science and Engineering, National Chiao Tung University

関連論文

• Luminescent Characteristics of ZnGa_2O_4:Mn Phosphor Thin Films Grown by Radio-Frequency Magnetron Sputtering
• Microwave Dielectric Properties and Microstructures of (Ba_Pb_x)O・La_2O_3・4.7TiO_2 Ceramics
• Effects of Substrate Temperature and Oxygen Partial Pressure on the Properties of Sputtered Zirconium Titanate Thin Films
• Effect of Glass Addition on Microwave Properties of BaO・La_2O_3・4.7TiO_2

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