| abstract |
The invention discloses a preparation method of a zinc oxide-based nano composite powder resistor disc, which comprises the steps of preparing zinc oxide-based nano composite powder, containing water, tabletting, sintering, cleaning a grinding sheet, spraying aluminum and coating insulating glaze on the side surface, thereby finally obtaining the zinc oxide-based nano composite powder resistor disc. The zinc oxide-containing metal oxides prepared by the chemical sol-gel method are all nano-level powder, all components are uniformly mixed, and the particle size distribution of particles is small, so that the potential gradient, the through-current capacity and the large-current impact resistance of the zinc oxide resistance chip are improved; the preparation of the zinc oxide resistance card does not need ball milling and granulation processes, so that the cost can be saved, the production efficiency is improved, and the batch production is facilitated; according to the invention, polyvinyl alcohol as an adhesive is not added, the rough blank prepared by tabletting can keep good strength, cracks can not occur during calcination, the production cost is reduced, and the method is environment-friendly. |