The invention belongs to the technical field of
ceramic materials, and discloses a giant
dielectric constant
strontium titanate dielectric ceramic and a preparation method thereof. The
chemical formula of the
ceramic is Sr1-xEuxTiO3, wherein x is more than or equal to 0.01 and less than or equal to 0.015. The preparation method comprises the following steps: proportioning SrCO3, Eu2O3 and TiO2, mixing, and carrying out ball milling;
drying the ball-milled raw materials, sieving, pre-
sintering at 1000 DEG C for 3 hours, and mixing and ball-milling the pre-sintered
powder;
drying and sieving the ball-milled raw materials, adding a binder into the obtained
powder, sieving, granulating, pressing into a
green body, and discharging glue; and
sintering the blank body after complete glue removal at 1400 DEG C in N2
atmosphere, and preserving heat for 6 hours to obtain the final sample. According to the invention, the Sr1-xEuxTiO3
dielectric ceramic is prepared through
doping modification by adopting a traditional
solid-
phase method, the dielectric constant is improved, the lower
dielectric loss is kept, and the dielectric property of the ceramic material is further improved, so that the actual application requirements are better met.