| 摘要 |
<p>PURPOSE:To produce resisting coat film with stable quality, by forming the coat films of a composition comprising powders of an oxide of platinum group element, Indium oxide, glass powder creating crystal phase during a baking process, and ceramic, and an organic vehicle. CONSTITUTION:Oxides of the platinum group elements such as RuO2, RhO3, OsO2, IrO2, PtO2 have low resistivity. On the contrary, In2O3 is a semiconductor inclining toward an insulator, CdO is an N-type semiconductor, and SnO and SnO2 are resistors. These resistors can be combined properly with the oxides of the platinum group elements so that a resistance value can be changed as desired with a total amount of them unchanged substantially. Therefore, glass powder and ceramic powder can be mixed in substantially fixed proportions. Accordingly, it is possible to obtain resisting coat films with uniform quality, uniform adhesion to a base and uniform coefficients of expansion and contraction.</p> |
