本論文中利用反應燒結法(reaction-sintering process)製備添加BaO之(Zr0.8, Sn0.2)TiO4 (ZST)介電陶瓷與機械化學合成法(mechanochemical synthesis)製備奈米粉體及ZST陶瓷體之燒結，並針對材料結構及微波介電特性進行分析。
反應燒結法無需煆燒步驟，ZST陶瓷可在1550℃燒結6小時後得到，其密度為4.623 g/cm3 (達理論密度之89.08%)；添加1wt%的BaO在1390℃燒結4小時的密度為4.890 g/cm3 (達理論密度之94.22%)，微波介電特性為 =36.87、 =47200GHz(7.4~7.8GHz)、 = -3.04 ppm/℃。
機械化學合成法以高能量球磨原始粉末5小時可得微弱強度之ZST相，粉末粒徑可達奈米級，添加1wt%的ZnO在1390℃燒結4小時後，密度為4.947 g/cm3 (達理論密度之95.32%)，微波介電特性為 =36.83、 =46800GHz(7.4~7.8GHz)、 = -1.74 ppm/℃。

The aim of this work was an investigation of structure and dielectric properties of BaO-doped (Zr0.8, Sn0.2)TiO4 (ZST) ceramics by reaction-sintering process and nanopowder derived by using mechanochemical synthesis with sintered ceramics.
In the reaction-sintering process, the mixture of raw materials was pressed and sintered directly without any calcinations involved. ZST with density of 4.623 g/cm3 (89.08% of the theoretic value) was obtained at 1550°C for 6 h sintering.A density 4.890 g/cm3 (94.22% of the theoretic value) and =36.87 and =47200GHz(7.4~7.8GHz) and = -3.04 ppm/℃ were obtained for 1wt% BaO-doped ZST ceramic sintered at 1390°C/4 h.
In the mechanochemical synthesis, a weak ZST phase was obtained in nanopowder by high energy ball mill for 5h. A density 4.947 g/cm3 (95.32% of the theoretic value) and =36.83 and =46800GHz(7.4~7.8GHz) and = -1.74 ppm/℃ were obtained for 1wt% ZnO-doped ZST ceramic sintered at 1390°C/4 h.

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