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Dense, homogeneous and fully developed finegrained ferroelectric Pb(Zr 0.53 Ti 0.47 )O 3 -based glassceramics have been successfully prepared at a lowsintering temperature of 850-900°C by a modified hybrid process in air. The influence of the PbO-B 2 O 3 -SiO 2 (abbreviated as PBS) glass-gel content on the microstructure, dielectric, and ferroelectric properties of such glassceramics has been investigated. The temperature dependence of the dielectric constant indicated that the finegrained Pb(Zr 0.53 Ti 0.47 )O 3 (abbreviated as PZT(53/47)) based glass-ceramic shows the characteristic dispersion at the Curie point. Ferroelectric hysteresis loop analyses have been performed to manifest the ferroelectric nature of the highly crystallized PZT(53/47) phase prepared by this modified novel hybrid process despite containing higher wt% glass-gel contents. The best dielectric and ferroelectric properties in a typical sample with 5% by weight of glassgel content were found to have dielectric constant and loss tangent of 920 and 0.02 at 1 kHz, respectively. The saturation polarization (P s ), and remanent polarization (P r ) as well as the coercive field (E c ) are 21.9 μC/cm 2 , 10.8 μC/cm 2 and 2.19 kV/mm, respectively.

A new kind of multiferroic three-ply-structured nanoceramic composites consisting of nanosized alloy-based magnetostrictive (MS) and ferroelectric powders (FE) were fabricated successfully by a conventional solid state reaction in air or argon ambient in our previous investigation. But there are still some problems needed to be solved, for example, the magnetic aging and decrease of saturated magnetization phenomena occurred in samples are perhaps related to the harsh preparation conditions such as storage duration and sintering atmosphere and so forth. In this paper, we will review the characteristics of the novel nanocomposites by means of the microstructure and magnetism existed in the samples with nanosized MS powders (i.e. (Tb0.3Dy0.7)0.75Pr0.25Fe1.55, Sm0.88Nd0.12Fe1.93) as fillers. Also, we hope some reasonable explanations and deeper understandings can be concluded about the proposed ageing and magnetism reduction exhibited when the samples were subjected to co-firing in air or argon ambient. Finally, the potential improvement and multifunctional applications in the future are also suggested.