雙鈣鈦礦結構材料Sr2FeMoO6所具有的特殊電性與磁性行為使其成為高應用潛力的新穎材料，但是其對於製程參數變化敏感而不穩定的特性，造成其研究上的困難和應用上的阻礙。本研究論文聚焦於探討其製程參數的最佳化，並且在歸納製程參數影響後，著手分析不同氧分壓濃度環境下，所燒結試片之晶體顯微結構，電傳導性質，及磁阻性質。
透過嚴謹的氧分壓濃度控制，證實在不同氧分壓濃度下燒結之試片，其晶體顯微結構中的反相晶界APB分佈呈現出不一樣的型態。在較高的氧分壓濃度，反相晶界APB因為B位置的Fe/Mo離子非均勻分佈，而具有核殼結構分佈的Maze-like APB和Swirl-like APB兩種區域。隨著氧分壓濃度的持續降低，此核殼結構分佈的反相晶界APB會因為B位置Fe/Mo離子逐漸均勻分佈而轉變為Swirl-like APB單一分佈。而這樣的過程，會進一步影響到磁阻材料Sr2FeMoO6所表現出來的電性與磁性行為。
觀測得到的三種電性傳輸行為，可以透過氧分壓濃度高低劃分為三個區間。而這樣的區間劃分可以和晶體顯微結構的觀察結果互相映證，最後利用這樣的觀察結論架構出整個磁阻材料Sr2FeMoO6的合成機制。

The special electronic and magnetic properties of Sr2FeMoO6 have attracted much interest on highly potential application and novel material. But senstive and unstable synthysis process has hinded the research and blocked its applications. This research project is focused on optimizing its process parameters and analyizing the micro-structure, electronic conduction, and magnetresistance properties under different oxygen partial pressure during sintering process.
Through the detail controlling of oxygen partial pressure during sintering process, it have been proofed that the distribution of anti-phase boundaries (APB) in micro-structure would be variation via the controlling. In relative high oxygen partial pressure, the APB would distribute as core-shell structure, core as maze-like APB and shell as swirl-like APB, due to the in-homogeneious of B-site Fe/Mo ions. When lowering the oxygen partial pressure, such sore-shell structure would turn into Swirl-like APB united distribution. And such distribution of APB due to order-disorder B-site Fe/Mo ions would influence the electronic and magnetic properties of Sr2FeMoO6. The analysis of electronic conduction behavior could be divided into three major regions. And such three regions could be maped onto the observation results of micro-stucture through TEM analysis. Finally, the results could be used to establish the formation mechanism of Sr2FeMoO6.

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