TY - GEN
T1 - Effect of PH on dielectric properties of CaCu3Ti 4O12 ceramics by coprecipitation
AU - Yang, Yan
AU - Li, Shengtao
PY - 2009
Y1 - 2009
N2 - CaCu3Ti4O12 ceramics were prepared by coprecipitation method. The pH value of reaction solutions plays an important role in the coprecipitation process. First, the pH value of Ti precursor solution must be controlled at around 3, in order to get clear Ti solution. In addition, the pH value of Ca and Cu precursor solution has a great influence on the properties of both precursor and CaCu3Ti4O 12 ceramics obtained subsequently. The properties change a lot, even when the pH value of Ca and Cu solution changes in a small range. It can be seem from the XRD patterns that the content of the impurity phase increases with increasing pH value. As to the microstructure, the grain size of CaCu 3Ti4O12 ceramics decreases with increasing pH value. Most significantly, the nonlinear coefficient, dielectric constant and loss can all be adjusted by this pH value. Relatively high dielectric constant and low loss can be obtained when this pH value is 5.10. This gives us a clue to improve the properties of CaCu3Ti4O12 ceramics which has been investigated for several years.
AB - CaCu3Ti4O12 ceramics were prepared by coprecipitation method. The pH value of reaction solutions plays an important role in the coprecipitation process. First, the pH value of Ti precursor solution must be controlled at around 3, in order to get clear Ti solution. In addition, the pH value of Ca and Cu precursor solution has a great influence on the properties of both precursor and CaCu3Ti4O 12 ceramics obtained subsequently. The properties change a lot, even when the pH value of Ca and Cu solution changes in a small range. It can be seem from the XRD patterns that the content of the impurity phase increases with increasing pH value. As to the microstructure, the grain size of CaCu 3Ti4O12 ceramics decreases with increasing pH value. Most significantly, the nonlinear coefficient, dielectric constant and loss can all be adjusted by this pH value. Relatively high dielectric constant and low loss can be obtained when this pH value is 5.10. This gives us a clue to improve the properties of CaCu3Ti4O12 ceramics which has been investigated for several years.
UR - https://www.scopus.com/pages/publications/74349100882
U2 - 10.1109/ISAF.2009.5307564
DO - 10.1109/ISAF.2009.5307564
M3 - 会议稿件
AN - SCOPUS:74349100882
SN - 9781424449699
T3 - IEEE International Symposium on Applications of Ferroelectrics
BT - 2009 18th IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2009
T2 - 2009 18th IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2009
Y2 - 23 August 2009 through 27 August 2009
ER -