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  • 學位論文

介電陶瓷材料之微波介電特性改善與應用

Improvement of Microwave Dielectric Material and Application for Wireless Communication

指導教授 : 陳元斌
共同指導教授 : 李炳鈞(Bing-Jing Li)

摘要


本論文首先探討(Mg0.95Co0.05)2(Ti1-xSnx)O4(x = 0.01~0.09)之微波介電特性,由實驗得知(Mg0.95Co0.05)2(Ti0.97Sn0.03)O4在燒結溫度1350℃持溫4小時擁有最佳微波介電特性:ε_r~14.78、Q×f~327,900 GHz、τ_f~-47.07 ppm/℃。為求τ_f~0的要求,添加具有正值共振頻率溫度飄移係數的材料(Ca0.95Sr0.05)(Ti0.97Sn0.03)O3(τ_f~+807.71ppm/℃)由實驗得知0.92(Mg0.95Co0.05)2(Ti0.97Sn0.03)O4-0.08(Ca0.95Sr0.05)(Ti0.97Sn0.03)O3在燒結溫度1325℃時持溫4小時擁有最佳微波特性:ε_r~18.42、Q×f~237,200 GHz、τ_f~3.72ppm/℃。 另外探討Ca5A4(Ti0.95Sn0.05)O17(A=Ta、Nb)由實驗得知在燒結溫度1375℃持溫4小時擁有最佳微波介電特性:ε_r~Ta:72.58、ε_r~Nb:57.407、Q×f~Ta:16400 GHz、Q×f~Nb:10400GHz、τ_f~Ta:195.01 ppm/℃、τ_f~Nb:64.77ppm/℃。CaLa4(Ti0.95Sn0.05)5O17 由實驗得知在燒結溫度1400℃持溫4小時擁有最佳微波介電特性:ε_r~56.11、Q×f~8422 GHz、τ_f~-8.188ppm/℃。CaNd4(Ti0.95Sn0.05)5O17由實驗得知在燒結溫度1425℃持溫4小時擁有最佳微波介電特性:ε_r~42.19、Q×f~4355 GHz、τ_f~-62.81ppm/℃。 此外,本論文以FR-4、Al2O3及自製基板0.92(Mg0.95Co0.05)2(Ti0.97Sn0.03)O4-0.08(Ca0.95Sr0.05)(Ti0.97Sn0.03)O3設計及製作一操作在2.4 GHz的微帶線帶通濾波器。最後量測其頻率響應,由量測結果得到,利用高介電系數及低損耗的材料做為電路基板時,能達到縮小面積以及具有更好的濾波特性。 關鍵字:介電陶瓷、濾波器。

關鍵字

介電陶瓷 濾波器

並列摘要


This paper first discusses (Mg0.95Co0.05)2(Ti1-xSnx)O4(x=0.01~0.09) of the microwave dielectric characteristics by experiment that (Mg0.95Co0.05)2 (Ti0.97Sn0.03)O4 holding temperature for 4 hours at a sintering temperature 1350℃ has the best microwave dielectric properties: ε_r~ 14.78, Q×f ~ 327,900 GHz, τ_f ~ -47.07 ppm/℃. For the sake of τ_f requirements to 0, with a value added resonance frequency temperature drift coefficient material (Ca0.95Sr0.05) (Ti0.97Sn0.03) O3 (τ_f ~ + 807.71 ppm/℃) experimentally that 0.92 (Mg0.95Co0.05)2(Ti0.97Sn0.03)O4-0.08(Ca0.95Sr0.05)(Ti0.97Sn0.03)O3 at a sintering temperature 1325℃ holding temperature at 4 hours with the best microwave characteristics: ε_r ~ 18.42 , Q×f ~ 237,200 GHz, τ_f~ 3.72 ppm/℃. Further Discussion Ca5A4 (Ti0.95Sn0.05)O17(A = Ta, Nb) held by the experiment that the sintering temperature of 1375℃ temperature four hours with the best microwave dielectric properties: ε_r ~ Ta: 72.58, ε_r ~ Nb: 57.407 , Q×f ~ Ta: 16400 GHz, Q×f ~ Nb: 10400GHz, τ_f~ Ta: 195.01 ppm/℃, τ_f~ Nb: 64.77 ppm/℃. CaLa4 (Ti0.95Sn0.05)5O17 experimentally that holding temperature four hours with the best microwave dielectric properties at a sintering temperature 1400℃: ε_r~ 56.11, Q×f ~ 8422 GHz, τ_f ~ -8.188 ppm/℃. CaNd4 (Ti0.95Sn0.05)5O17 experimentally that holding temperature four hours with the best microwave dielectric properties at a sintering temperature 1425℃: ε_r ~ 42.19, Q×f ~ 4355 GHz, τ_f~ -62.81 ppm/℃. In addition, the paper FR-4, Al2O3 and homemade board 0.92 (Mg0.95Co0.05)2 (Ti0.97Sn0.03)O4-0.08(Ca0.95Sr0.05)(Ti0.97Sn0.03)O3design and production an operation in the 2.4 GHz microstrip bandpass filter. When the last measured frequency response, obtained from the measurement results, the use of high dielectric constant and low loss material used as the circuit board area reduction and to achieve better filtering characteristics. Keywords: dielectric ceramic 、filter.

並列關鍵字

dielectric ceramic filter

參考文獻


[8] 鍾明蓉, "Ba2Ti9O20微波介電陶瓷之製備及其微波特性之研究," 中原大學化學研究所學位論文, pp. 1-95, 2001.
[7] 許倬彰, "介電陶瓷材料 (Mg1-xZnx)2(Ti1-ySny)O4之微波介電特性改善與應用," 成功大學電機工程學系學位論文, pp. 1-112, 2015.
[1] H. K. Shin, H. Shin, S. Y. Cho, and K. S. Hong, "Phase Evolution and Dielectric Properties of MgTiO3–CaTiO3‐Based Ceramic Sintered with Lithium Borosilicate Glass for Application to Low Temperature Co‐Fired Ceramics," Journal of the American Ceramic Society, vol. 88, pp. 2461-2465, 2005.
[2] A. Belous, O. Ovchar, D. Durilin, M. M. Krzmanc, M. Valant, and D. Suvorov, "High‐Q Microwave Dielectric Materials Based on the Spinel Mg2TiO4," Journal of the American Ceramic Society, vol. 89, pp. 3441-3445, 2006.
[3] C. L. Huang and J. Y. Chen, "High‐Q Microwave Dielectrics in the (Mg1− xCox)2TiO4 Ceramics," Journal of the American Ceramic Society, vol. 92, pp. 379-383, 2009.

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