The invention discloses a method for
sintering PZT piezoelectric ceramics at low temperature and piezoelectric ceramics. The method comprises the following steps: putting PZT coarse
powder synthesized by a
solid phase method into deionized water, adding an appropriate amount of dispersant, and stirring evenly; Add
lead nitrate,
zirconium oxynitrate, and titanyl
nitrate solutions in proportion to the water of the above-mentioned uniformly dispersed PZT
powder, and stir evenly; while stirring, add
ammonia water dropwise, so that Pb, Zr, and Ti ions are simultaneously precipitated on the surface of the PZT coarse
powder, Form the PZT
coating powder
precipitation, continue to stir for a period of time after the
ammonia water is added dropwise; filter, collect the
sediment, wash it with water, and dry it; add an appropriate amount of binder to the dried PZT
coating powder, pressurize Granulating and passing through a 40-60 mesh
sieve to obtain a granulated PZT-coated powder;
dry pressing the granulated PZT-coated powder, and
sintering in a
muffle furnace at 1100-1200°C for 1.5-2.5 hours to obtain PZT piezoelectric ceramics; the
sintering temperature of the method is low, the volatilization of lead element is less during the sintering process, and the composition ratio of the finished product is close to the original designed formula.