TY - JOUR
T1 - Formation process and microwave dielectric properties of the R 2V2O7 (R=Ba, Sr, and Ca) ceramics
AU - Joung, Mi Ri
AU - Kim, Jin Seong
AU - Song, Myung Eun
AU - Nahm, Sahn
AU - Paik, Jong Hoo
PY - 2009/12
Y1 - 2009/12
N2 - Formation process and microwave dielectric properties of the R 2V2O7 (R=Ba, Sr, and Ca) ceramics were investigated. Transient RV2O6 phases, which were formed at 300°∼500°C by the reaction of RCO3 and V 2O5, interacted with remnant RCO3 to form the homogeneous triclinic R2V2O7 phases at 600°-700°C. The Sr2V2O7 and Ca 2V2O7 ceramics sintered at 1000° and 950°C, respectively, for 10 h showed a dense microstructure with the microwave dielectric properties of εr=10.4-12.1, Q × f=15 200-19 520 GHz, and τf=-30.9-34.8 ppm/°C. However, the Ba2V2O7 ceramic was well sintered at 900°C for 10 h and it showed the good microwave dielectric properties of εr=10.1, Q × f=51 630 GHz, and τf=-26.5 ppm/°C.
AB - Formation process and microwave dielectric properties of the R 2V2O7 (R=Ba, Sr, and Ca) ceramics were investigated. Transient RV2O6 phases, which were formed at 300°∼500°C by the reaction of RCO3 and V 2O5, interacted with remnant RCO3 to form the homogeneous triclinic R2V2O7 phases at 600°-700°C. The Sr2V2O7 and Ca 2V2O7 ceramics sintered at 1000° and 950°C, respectively, for 10 h showed a dense microstructure with the microwave dielectric properties of εr=10.4-12.1, Q × f=15 200-19 520 GHz, and τf=-30.9-34.8 ppm/°C. However, the Ba2V2O7 ceramic was well sintered at 900°C for 10 h and it showed the good microwave dielectric properties of εr=10.1, Q × f=51 630 GHz, and τf=-26.5 ppm/°C.
UR - http://www.scopus.com/inward/record.url?scp=70450278726&partnerID=8YFLogxK
U2 - 10.1111/j.1551-2916.2009.03324.x
DO - 10.1111/j.1551-2916.2009.03324.x
M3 - Article
AN - SCOPUS:70450278726
SN - 0002-7820
VL - 92
SP - 3092
EP - 3094
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
IS - 12
ER -