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PZT-Type Ceramics Doped with Manganese, Antimony, Lanthanum and Tungsten - Technology and Physical Properties

Bochenek D., Niemiec P., Ćwikiel E., Goryczka T.

Archives of Metallurgy and Materials

2020

Vol. 65, iss. 2

827--837

The work three ceramic compositions based on PbZr0.49 Ti0.51O3 doped with manganese (Mn), antimony (Sb), lanthanum (La) and tungsten (W) were obtained. The introduction of a set of admixtures was aimed at improving the sinterability of ceramic materials and optimizing its electrophysical parameters. Multi-component materials of the PZT-type with a general formula: Pb(PbZr0.49 Ti0.51)0.94 Mn0.021 Sb0.016 LayWz O3 (where y from 0.008 to 0.012 and z from 0.012 to 0.014) were prepared by the conventional mixed oxide method. After mixing and drying the powder mixtures were calcined in air at 850°C for 4 h, while densification of the powders was carried out by the free sintering method at 1150°C for 2 h. The final steps of technology were grinding, polishing, annealing and putting silver paste electrodes onto both surfaces of the samples for electrical testing. XRD, SEM, EDS, dielectric, ferroelectric, piezoelectric properties and DC electrical conductivity of the obtained ceramic compositions were carried out. X-ray tests of the crystal structure conducted at room temperature have shown that all obtained the PZT-type materials were a single phase (perovskite type) without the presence of a foreign phase. Symmetry of the crystal lattice was identified as space group P4mm. Temperature dielectric studies have shown high values of dielectric permittivity and low dielectric loss. The presented physical properties of ceramic samples based on PZT confirm their predisposition for application in modern microelectronic and micromechatronic applications.

Otrzymywanie ceramiki ferroelektrycznej od kuchni

Ćwikiel E.

Materiały Ceramiczne

2015

T. 67, nr 4

421--425

Właściwości ceramiki ferroelektrycznej, a co za tym idzie możliwości jej aplikacji, zależą od sposobu otrzymywania. Przedstawiono główne zastosowania ceramiki ferroelektrycznej. Opisano kolejne etapy procesu jej otrzymywania: przygotowanie do syntezy metodą reakcji w fazie stałej, syntezę metodą reakcji w fazie stałej, formowanie, spiekanie i obróbkę końcową.

Final properties of ferroelectric ceramics depends on the processing conditions. Major applications of ferroelectric ceramics are presented. Processing steps: preparation of starting materials, synthesis by mixed oxides method, forming, sintering and finishing are described.