Barium zirconate titanate Ba͑Zr 0.2 Ti 0.8 ͒O 3 ͑BZT͒ thin films on La 0.7 Sr 0.3 MnO 3 ͑LSMO͒-coated Si and Pt/ Ti/ SiO 2 / Si substrates have been prepared by pulsed laser deposition and crystallized in situ at 650°C.

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The influence of substrate rotary speed, species of reaction gases and flows on nanoindentation, nanoscratch fracture, and residual stress were explored on reactive sputtered nanoscale CrN/ZrN multilayered coatings. Hardness and critical fracture load as high as 32 GPa and 85 mN with desirable compressive stress were achieved for this model. A proper percentage of NH 3 in N 2 reaction gas was also proved to be of benefit to synthesize high-hard and fractureresistant CrN/ZrN coatings. The low-angle XRD patterns provided the layer modulation period of the coatings. A marked polycrystallite of two-cubic NaCl phase CrN + ZrN as well as probably hexagonal Cr 2 N with small modulation period corresponded to the enhanced mechanical properties.

Lead strontium titanate ( Sr 1-x Pb x) TiO 3 (0.20 ≤ x ≤ 0.45,step = 0.05) ceramics were prepared by conventional mixed oxide method. The X-ray diffraction patterns indicate that the prepared samples have perovskite-type structure. With the increase of Pb content, there is a tendency from the cubic to tetragonal structure. The scanning electron microscopy micrographs reveal that the addition of Pb can affect microstructure. The dependent temperature dielectric permittivity and dielectric loss were investigated in the frequency range from 100 Hz to 1 MHz. The maximum peak of the dielectric permittivity versus temperature curve was broadened and a frequency dispersion of the dielectric permittivity was observed for the (Sr0.8Pb0.2)TiO3 ceramics. The results obtained at the frequency of 10 kHz reveal the Curie temperature linearly increased with the lead content. The fitted curves of temperature versus inverse dielectric permittivity at 10 kHz for ( Sr 1-x Pb x) TiO3 ceramics are consistent with Curie–Weiss law. The Pyroelectric properties were also investigated. The high pyroelectric coefficients and figure of merits indicate that the SPT ceramics are potential materials for pyroelectric sensors.

Dielectric spectra and magnetization hysteresis loops were used to investigate the grain size effect with temperature on the electrical and magnetic response of co-precipitation derived spinel (Ni0.5Zn0.5)Fe2O4 (NZFO) ceramics. Remarkable dielectric relaxation phenomena of non-Debye type have been observed in each NZFO ceramics as confirmed by two kinds of Cole-Cole plots of the 1100 °C sintered samples, mainly due to the electron-hopping mechanism between n-type and p-type carriers and interfacial ion effect when applied an increase of temperature. The high and low response of grain and grain-boundary regions were determined by modeling the impedance experimental results on two equivalent RC circuits taking into account grain deep trap states. By employing the modified Arrhenius equation, activation energy values of different sintering temperatures were calculated and analyzed in combination with oxygen vacancy. In addition, the magnetization of various sintering temperature samples is dominated by cation distribution and surface effect in different particle ranges.