A Research of the Zirconia element surface coating technology: The application of TRIZ method

Oxygen senior is an important element of the automobile´s fuel injection system. The primary sensing element of the oxygen sensor is a Zirconia ceramic element, which is able to detect the quantity of the oxygen inside the exhaust. Since the surface of the ceramic element is coated by a thin layer of platinum, it is necessary to coat an additional protective layer. As the protective layer must he endurable in the environment of high temperature and high impaction, the related research topics have became to be interested. This research is devoted to study the coating technology of the protective layer, and to build an automatic coating system. The method is to study the manual coating procedures that are used in the manufacturer. By analyzing the procedures, the research used TRIZ (Theory of Innovative Problem Solving) to improve the process and designed an automatic costing method. The main result of this study is the development of the automatic coating system, which is very useful for the manufacturer to carry out their mass production.