Effect of sol-gel preparation method on particle morphology in pure and nanocomposite PZT thin films
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Helena Bruncková
,
Ľubomír Medvecký
Abstract
Double-scale composite lead zirconate titanate Pb(Zr0.52Ti0.48)O3 (PZT) thin films of 360 nm thickness were prepared by a modified composite sol-gel method. PZT films were deposited from both the pure sol and the composite suspension on Pt/Al2O3 substrates by the spin-coating method and were sintered at 650°C. The composite suspension formed after ultrasonic mixing of the PZT nanopowder and PZT sol at the powder/sol mass concentration 0.5 g mL−1. PZT nanopowder (≈ 40–70 nm) was prepared using the conventional sol-gel method and calcination at 500°C. Pure PZT sol was prepared by a modified sol-gel method using a propan-1-ol/propane-1,2-diol mixture as a stabilizing solution. X-ray diffraction (XRD) analysis indicated that the thin films possess a single perovskite phase after their sintering at 650°C. The results of scanning electron microscope (SEM), energy-dispersive X-ray (EDX), atomic force microscopy (AFM), and transmission electron microscopy (TEM) analyses confirmed that the roughness of double-scale composite PZT films (≈ 17 nm) was significantly lower than that of PZT films prepared from pure sol (≈ 40 nm). The composite film consisted of nanosized PZT powder uniformly dispersed in the PZT matrix. In the surface micrograph of the film derived from sol, large round perovskite particles (≈ 100 nm) composed of small spherical individual nanoparticles (≈ 60 nm) were observed. The composite PZT film had a higher crystallinity degree and smoother surface morphology with necklace clusters of nanopowder particles in the sol-gel matrix compared to the pure PZT film. Microstructure of the composite PZT film can be characterized by a bimodal particle size distribution containing spherical perovskite particles from added PZT nanopowder and round perovskite particles from the sol-matrix, (≈ 30–50 nm and ≈ 100–120 nm), respectively. Effect of the PZT film preparation method on the morphology of pure and composite PZT thin films deposited on Pt/Al2O3 substrates was evaluated.
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© 2011 Institute of Chemistry, Slovak Academy of Sciences
Artikel in diesem Heft
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Artikel in diesem Heft
- 5th conference on membrane science and technology PERMEA 2010
- A procedure for the determination of dichloromethane and tetrachloroethene in water using pervaporation and gas chromatography
- Modeling of diffusive transport of benzoic acid through a liquid membrane
- Comparison of ceramic capillary membrane and ceramic tubular membrane with inserted static mixer
- New approach to regeneration of an ionic liquid containing solvent by molecular distillation
- Mass-transfer in pertraction of butyric acid by phosphonium ionic liquids and dodecane
- Determination of carbon in solidified sodium coolant using new ICP-OES methods
- Interpretation of interactions of halogenated hydrocarbons with modified silica adsorbent coated with 3-benzylketoimine group silane
- Adaptive nonlinear control of a continuous stirred tank reactor
- Anaerobic baffled reactor treatment of biodiesel-processing wastewater with high strength of methanol and glycerol: reactor performance and biogas production
- Analysis of streptolydigin degradation and conversion in cultural supernatants of Streptomyces lydicus AS 4.2501
- Spectroscopic and magnetic evidence of coordination properties of bioactive diethyl (pyridin-4-ylmethyl)phosphate ligand with chloride transition-metal ions
- Microstructure and properties of polyhydroxybutyrate-calcium phosphate cement composites
- Intercalation of basic amino acids into layered zirconium proline-N-methylphosphonate phosphate
- Effect of sol-gel preparation method on particle morphology in pure and nanocomposite PZT thin films
- Synthesis, spectroscopic and configurational study, and ab initio calculations of new diazaphospholanes
- Synthesis and in vitro antimicrobial activity of new 3-(2-morpholinoquinolin-3-yl) substituted acrylonitrile and propanenitrile derivatives
- Silicon-based thiourea-mediated and microwave-assisted thio-Michael addition under solvent-free reaction conditions
- One-pot synthesis of 2-amino-3-cyano-4-arylsubstituted tetrahydrobenzo[b]pyrans catalysed by silica gel-supported polyphosphoric acid (PPA-SiO2) as an efficient and reusable catalyst
- Comparison and optimisation of biodiesel production from Jatropha curcas oil using supercritical methyl acetate and methanol
- Determination of photoredox properties of individual kinetically labile complexes in equilibrium systems
- A halogenated coumarin from Ficus krishnae
- 4β-Isocyanopodophyllotoxins: valuable precursors for the synthesis of new podophyllotoxin analogues
- Environmentally benign one-pot synthesis and antimicrobial activity of 1-methyl-2,6-diarylpiperidin-4-ones
