Patent ID: 11873248
Assignee: YANGTZE DELTA REGION INSTITUTE (HUZHOU), UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  H | IPC C

Claim 2:
3. A preparation method of a modified NiO—Ta2O5-based microwave dielectric ceramic material sintered at low temperature is characterized in that it comprises the following steps:
step 1, mixing ZnO, CuO, NiO, B2O3, SnO2, Ta2O5 and V2O5 powder according to the general chemical formula: (1.587y-0.198xy)ZnO-(2.597y-0.035xy)V2O5;(x-0.10.2y-0.030.09), wherein 0.1≤x≤0.2; 0.03≤y≤0.09;
step 2, putting the powder mixed in step 1 into a ball milling tank, and performing ball milling with zirconia balls and deionized water according to a mass ratio of powder:zirconia balls:deionized water of 1:5-7:3-5, performing the planetary ball milling for 6-8 hours, taking it out, drying it in an oven at 80-120° C., sieving it with a 40-60 mesh sieve, and pre-sintering it in an atmosphere environment at 850-900° C. for 3˜5 hours;
step 3, performing ball milling on the powder pre-sintered in step 2 again according to a mass ratio of powder:zirconium balls:deionized water of 1:4-6:1-3, and performing planetary ball milling and mixing for 3-6 hours, taking it out and drying, and adding polyvinyl alcohol solution into the obtained powder for granulation;
step 4, pressing and molding the ceramic raw material prepared in step 3, discharging the glue at 600-650° C., and then sintering in the atmosphere environment at 875-950° C. for 4-6 hours to obtain the modified NiO—Ta2O5-based microwave dielectric ceramic material sintered at low temperature.