Last Updated on October 7, 2021 by You Ling
- Prepare raw materials: Carry out the pre-treatment of the materials, remove impurities and dampness, and then weigh the various raw materials according to the formula ratio, paying attention to a small amount of additives to be placed in the middle of the large materials.
- Mixing and grinding: The purpose is to mix and grind various raw materials to prepare conditions for complete solid-phase reaction for pre-burning. Generally, dry grinding or wet grinding is adopted. Dry milling can be used for small batches, and agitating ball milling or jet pulverization can be used for large batches, with higher efficiency.
- Pre-sintering: The purpose is to perform a solid-phase reaction of each raw material at a high temperature to synthesize piezoelectric ceramics. This process is very important. It will directly affect the sintering conditions and the performance of the final product.
- secondary fine grinding: The purpose is to vibrate, mix and grind the pre-fired piezoelectric ceramic powder finely, so as to lay a solid foundation for the uniform performance of the porcelain.
- Granulation: The purpose is to make the powder form high-density particles with good fluidity. The method can be carried out manually but the efficiency is low. The current efficient method is to use spray granulation. Adhesives are added in this process.
- Forming: The purpose is to compact the pelletized material into a blank of the required prefabricated size.
- plastic injection: the purpose is to remove the binder added during granulation from the blank.
- Porcelain by sintering: the blank is sealed and sintered into porcelain at high temperature. This link is very important.
- Shape processing: Grind and process the burned products to the required finished size.
- Electrode: set a conductive electrode on the required ceramic surface. The general methods include silver layer burning infiltration, chemical deposition, and vacuum coating.
- High voltage polarization: Orientation of the electrical domains inside the ceramic, so that the ceramic has piezoelectric properties.
- Final inspection: After the ceramic performance is stable, check the various indicators to see if it meets the expected performance requirements.
