Papers by Keyword: Ca₂P₂O₇

Abstract: In the present study, Ca2P2O7-doped β-Ca3(PO4)2 bioceramics were fabricated by pressureless sintering process. The effect of Ca2P2O7 on the sintering ability, mechanical strength and degradability of the ceramics were investigated. The results showed that the Ca2P2O7 could apparently decrease the sintering ability and mechanical properties of β-Ca3(PO4)2. Moreover, the relative density and mechanical strength of the sintered samples decreased gradually with the increase of the Ca2P2O7 additive amount. However, the dissolution rate of the samples increased with the increase of the Ca2P2O7 additive amount.

Abstract: The effects of CuO and V2O5 addition on sintering behaviors and microwave dielectric properties of 0.7Ca2P2O7-0.3TiO2 ceramics were investigated. With CuO and V2O5 addition, the sintering temperature of 0.7Ca2P2O7-0.3TiO2 can be effectively reduced from 1150 to 950oC. The dielectric constant of the low fired 0.7Ca2P2O7-0.3TiO2 ceramics was not significantly changed while the quality factor was affected by additives. The temperature coefficient of resonant frequency value was increased in negative value with the additive contents. V2O5 and CuO additives effectively improved the densification and dielectric properties of 0.7Ca2P2O7-0.3TiO2 ceramics. The correlation between the phase constituents and the dielectric properties was investigated with additive contents.