公开(公告)号：US06383443B1

公开(公告)日：2002-05-07

申请号：US09448712

申请日：1999-11-24

申请人： De-Yin Jeng ,  Chorng-Jeou Chen ,  Takayuki Suzuki

发明人： De-Yin Jeng ,  Chorng-Jeou Chen ,  Takayuki Suzuki

IPC分类号： C04B35624

CPC分类号： C04B35/111 ,  C04B35/624

摘要： Disclosed is a sol-gel process for making high-density monolithic alpha-alumina articles. Cracking problems caused by shrinkage of the gel during the drying and firing stages are minimized by controlling the temperature and humidity during the drying process and by using molds formed of prescribed polymeric materials, preliminarily coated with a silicone release agent. The process of the invention provides porous alpha-alumina articles having a controlled microstructure and a controlled pore size distribution, which are beneficial features when the material is used in practical applications, e.g., as substrates for gas sensors.

摘要翻译： 公开了用于制备高密度单片α-氧化铝制品的溶胶 - 凝胶法。 通过控制干燥过程中的温度和湿度以及使用预先涂覆有硅酮脱模剂的预定聚合物材料形成的模具，可以最大限度地减少干燥和焙烧阶段凝胶收缩引起的裂纹问题。 本发明的方法提供具有受控微结构和可控孔径分布的多孔α-氧化铝制品，当材料用于实际应用中时，这些特征是有益的特征，例如作为气体传感器的基底。