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La and Sr co-doped, modified lead zirconium titanate (PZT) ceramics, with composition Pb0.93La0.02Sr0.05 (Zr0.52Ti0.48) O3 was synthesized by dry-mixed planetary mill. The incorporation of La 3+ and Sr 2+ in the PZT lattice enhanced the tetragonality and suppressed grain growth thereby promoted piezoelectric and dielectric properties of the ceramics. The objective of this research is to determine the optimum poling parameters on La and Sr co-doped PZT (PLSZT) for better electrical properties. The optimum poling parameters (temperature, electric field and time) have been investigated via design of experiment (DOE) concept for the effective results. The results showed that when using the poling temperature at 140 °C with 4 kV/mm of electric field, the d33 and ɛᵣ values were found to be highest at 327 pC/N and 1620, respectively. It revealed that poling temperature and applied electric field plays a dominant role in influencing electrical performance of PLSZT which may be suitable for possible device applications.

Lead Zirconate Titanate (PZT) undoped and doped was prepared by using solid state reaction method. In this paper, PZT is doped with another elements with is La3+ and Sr2+ in order to enhance the properties of PZT. The samples were prepared via high planetary mill which is can skip the calcination process that can cause of PbO loss during firing. With the help of x-ray diffraction (XRD) and scanning electron microscopy (SEM), the formation of perovskite structure into newly modified ceramics was investigated and the grain growth of pure PZT and doped PZT were also investigated which is can enhance their properties which may be suitable for possible device applications.

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Cordierite powders were synthesized via a melt-quench method. The samples were melted at 1550°C for 4 hours and immediately quenched in distilled water. The bioglass ceramic frit was milled and calcined to produce cordierite powders. After that, cordierite was treated with calcium acetate as a calcium salt in order to enhance the bioactivity of cordierite. The powders were immersed in calcium acetate solution for 24 hours and dried in the oven at 80°C for 24 hours. The mixtures were pressed into pellet form for bioactivity testing. Then, cordierite pellets were soaked in simulated body fluid (SBF) solution for 7 days. SEM micrographs show the formation of the hydroxyapatite layer on its surface after soaking in SBF solution. While EDX analysis shows the presence of calcium after the treatment. The presence of cordierite and hydroxyapatite phases were confirmed by XRD analysis.