CAJ | 학술논문

本研究提出了一种利用光固化快速成型技术及凝胶注模工艺成功制备电磁带隙晶体的工艺路线。根据我们已有的研究，设计电磁带隙晶体的结构是晶格常数为7mm的球形金刚石负型结构。然后，采用光固化快速成型技术制备得到金刚石结构的树脂模型，将氧化铝浆料注入到该树脂模型中，经凝胶固化、冷冻干燥及两次烧结等工艺步骤，最终获得了收缩率为4%的氧化铝陶瓷的电磁带隙晶体。通过扫描电镜观察，经该工艺制备的氧化铝电磁带隙晶体微观形貌较均匀，且空隙较小。电磁波传输特性结果显示，该电磁带隙晶体能够在30.38GHz到39.06GHz波段形成完美带隙。
본연구제출료일충이용광고화쾌속성형기술급응효주모공예성공제비전자대극정체적공예로선。근거아문이유적연구，설계전자대극정체적결구시정격상수위7mm적구형금강석부형결구。연후，채용광고화쾌속성형기술제비득도금강석결구적수지모형，장양화려장료주입도해수지모형중，경응효고화、냉동간조급량차소결등공예보취，최종획득료수축솔위4%적양화려도자적전자대극정체。통과소묘전경관찰，경해공예제비적양화려전자대극정체미관형모교균균，차공극교소。전자파전수특성결과현시，해전자대극정체능구재30.38GHz도39.06GHz파단형성완미대극。
This study provided a new approach to fabricate electromagnetic band gap crystals by combining Stereolithography (SL) rapid prototyping technology and gel-casting process. According to our previous investigation, the electromagnetic band gap crystals are spherical diamond negative structure. The resin model of the diamond stucture was achieved by adopting the SL technology and was then injected with Al2O3 ceramic slurry. After the cured gelling process, freeze-drying process and twice sintering process, an electromagnetic crystal structure with a shrinkage factor of 4%was finally achieved. The scanning electron microscopic image of the structure showed a well-distributed shape and relatively small gap. The result of the electomagnetic propagation performance indicated that this electromagnetic crystals structure could form a perfect band gap from 30.38GHz to 39.06GHz.