Modified NiO-Ta2O5-based Microwave Dielectric Ceramic Material Sintered at Low Temperature and Its Preparation Method

The preparation method of the modified NiO-Ta2O5-based microwave dielectric ceramic material sintered at low temperature is characterized in that it comprises the following steps:

• step 1, mix ZnO, CuO, NiO, B2O3, SnO2, Ta2O5 and V2O5 powder according to the general chemical formula:
• (1.587y-0.198xy)ZnO-(2.597y-0.324xy)CuO-(1-x)NiO-(1.855y-0.231xy)B2O3-3 xSnO2-(1-x)Ta2O5-(0.284y-0.035xy)V2O5;(x = 0.1 ~ 0.2y=0.03~0.09);
• step 2:
• put the powder mixed in step 1 into a ball milling tank, and perform ball milling with zirconia balls and deionized water according to the mass ratio of powder:
• zirconia balls:
• deionized water of 1:5-7:3-5, perform the planetary ball milling for 6-8 hours, take it out, dry it in an oven at 80-120° C., sieve it with a 40-60 mesh sieve, and pre-sinter it in an atmosphere environment environment at 850-900° C. for 3~5 hours;
• step 3:
• perform ball milling on the powder pre-sintered in step 2 again according to the mass ratio of powder:
• zirconium balls:
• deionized water of 1:4-6:1-3, and perform planetary ball milling and mixing for 3-6 hours, take it out and dry, and add polyvinyl alcohol solution into the obtained powder for granulation;
• step 4, press and mold the ceramic raw material prepared in step 3, discharge the glue at 600-650° C., and then sinter in the atmosphere environment environment at 875-950° C. for 4-6 hours to obtain the modified NiO-Ta2O5-based microwave dielectric ceramic material sintered at low temperature.