Patent ID: 7132381

Claim:
A process for preparing low-temperature sintered microwave dielectric ceramics, comprising: (a) co-precipitating Nb and Bi or Zn in an aqueous basic solution to obtain a BiNbO 4 — or Zn 3 Nb 2 O 8 -precursor powder; (b) subjecting the precursor powder to a thermal decomposition to obtain a BiNbO 4 — or Zn 3 Nb 2 O 8 -powder; (c) adding CuO and V 2 O 5 to the powder obtained in (ii) in amounts ranging from 0.1 to 1% by weight and 0.2 to 2% by weight based on the mixture, respectively; and (d) pulverizing and sintering the mixture.