Study on three dimensional Photofabrication for Functional Ceramic Parts

尽管新的陶瓷材料被用于机电设备等高功能零件，但从成型成本和加工成本的经济角度来看，其应用领域还没有完全确定。与目前使用金刚石刀具加工高刚性加工中心相比，本研究重点研究了以光聚合为粘结剂，选择性结合陶瓷颗粒的三维零件的分层制造。结果总结如下：1.分层制造的成形性观察观察到紫外光激光光斑结合光致聚合物涂层陶瓷颗粒的现象。研究还发现，陶瓷颗粒直径和激光光斑直径决定了陶瓷的凝固深度。低粘度树脂的选择是必要的。2.功能陶瓷零件的成型性评价用固化光树脂制成的型腔模具用于生产陶瓷件，将陶瓷粉倒入型腔中形成陶瓷件。氧化铝溶胶被用作粘结剂。并将其成形性与石膏型零件进行了比较。孔隙度的提高是必要的。加热温度和干燥制度的选择是非常重要的。3.烧结度的评价。对固化后的光敏树脂型腔生产的陶瓷零件进行了测试。在建造之后，绿色部件被烧制。得到了2.21的比重。验证了功能陶瓷零件三维光刻的工艺原理。

Although new ceramic materials are used for high functional parts as mechanical and electric divices, its application areas have not been fully established from the economical point of view of high forming costs and finishing ones.Comparing with the current machining of high rigid machining center with a diamond tool, this research focuses on the layred manufacturing for three dimensional parts which the ceramic particles are bound selectively and the photopolymer is used as a binder.The results are summerized as follows ;1.Observation of formability oflayred manufacturingThe phenomenon is observed that photopolymer coated ceramic particles are bonded by UV laser spot. It is also observed that the solidified depth depends on the ceramics particle diameter and the laser spot diameter. The selection of low viscosity resin is necessary. Thus the problems are clarified to the formability of the layred manufacturing system with ceramic particle.2.The evaluation to the formability of functional ceramic partsA cavity die made from cured photo resin is used to produce ceramic parts which the ceramic powder is poured into the cavity to form ceramic parts. Alumina sol is used as a binder. The formability is compared with parts made by plaster mold. Improvement of porosity is necessary. Selection of heat temperature and dry system is important.3.The evaluation for the degree of sinteringThe ceramic parts produced by the cured photoresin cavity is tested. After building, green parts are sintered. The 2.21 of specific gravity is obtained. The process principle of the three dimensional photo-fabrication for functional ceramic parts is verified.