The microstructure and microwave dielectric properties of (1-x)Ba(Co 1/3Nb2/3)O3-xBa(Zn1/3Nb 2/3)O3 [(1-x)BCN-xBZN] ceramics with 0.0 ≤ x ≤ 1.0 were investigated. When the sintering temperature was 1400°C, a homogeneous phase with a 1 : 2 ordered structure was found in the specimens with x ≤ 0.3 but for the specimens with x ≥ 0.6, a disordered structure and BaNb 6O16 second phase were found. The grain growth related to the BaNb6O16 second phase occurred in the specimens with x ≥ 0.5. The temperature coefficient of the resonant frequency (τ f) increased with increasing x, and the specimens with 0.3 ≤ x ≤ 0.4 have zero τj. Dielectric constant (εr increased with the increase in x and was about 34.5 when x = 0.3. For the specimens with x ≤ 0.3, the Q × f value was high but decreased as x exceeded 0.3. The maximum Q × f value, 97,000 GHz, was obtained for 0.7BCN-0.3BZN ceramics sintered at 1400°C for 20 h.
|Number of pages||5|
|Journal||Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers|
|Publication status||Published - 2003 Nov|
- Ba(Co Nb)O
- Microwave dielectric properties
ASJC Scopus subject areas
- Physics and Astronomy(all)