Preparation and properties of sol-gel derived nanostructured thin ceramic layers

Sporn, D.; Raether, F.; Merklein, S.

doi:10.1016/0921-5093(93)90728-w

Cited by 8 publications

(1 citation statement)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nanostructured mullite (3Al 2 O 3 Á 2SiO 2 ) coatings have been found to have significantly higher hardness and Young's modulus as compared to a coating with micron sized grains. 174 Hard ceramic coatings, in general, show high plasticity, 175 and the graded nature of this coating results in even greater toughness. Recently, a functionally graded coating with decreasing Si 3 N 4 content from substrate to pure mullite outer layer has been developed to decrease sharp stress discontinuities at the substrate/coating interface.…”

Section: Functionalized Nanostructured Coatings Developmentmentioning

confidence: 99%

The Intersection of Design, Manufacturing, and Surface Engineering

Halada¹,

Clayton²

2012

Handbook of Environmental Degradation of Materials

View full text Add to dashboard Cite

Section: Functionalized Nanostructured Coatings Developmentmentioning

confidence: 99%

The Intersection of Design, Manufacturing, and Surface Engineering

Halada¹,

Clayton²

2012

Handbook of Environmental Degradation of Materials

View full text Add to dashboard Cite

A differential anomalous X‐ray scattering study of the formation of lead zirconate titanate via sol‐gel process

Beudert¹,

Bertagnolli²,

Gutwerk³

et al. 1997

Ber Bunsenges Phys Chem

View full text Add to dashboard Cite

A differential anomalous X-ray scattering (DAS) investigation on gels, produced by hydrolysis of a mixture of lead(I1)acetate and zirconium-and titanium-n-propoxides, and calcinated at the temperatures 200, 300, and 450 "C, is presented. Anomalous X-ray scattering was applied to get more precise information on the structural changes of the gel during calcination. n o different scattering experiments for each sample were performed with synchroton radiation of the energy below the L, edge of lead, namely at 11500 and 13025 eV. The data were corrected for absorption, fluorescence radiation and multiple scattering. The Compton and atomic scattering were subtracted after normalization to absolute units with values for the anomalous dispersion corrections, determined by an absorption experiment. The Fourier transform of the total and differential scattering intensities yields the total and differential atom pair correlation functions (TAPCF, DACPF), which provide information on the local structure of lead and its changes during the calcination process. The analysis of the TAPCF's and DAPCF's indicates a structure, similar to that existing in the pyrochlore or perovskite phase of lead zirconate titanate (PZT), even at low temperatures. By comparison of the corresponding atom pair correlation functions (APCF's) it can be deduced that the near range as well as the long range order in the local environment of lead nearly remains unaltered during the calcination process.

show abstract

Investigation of the Pyrolysis and Crystallization of Lead Zirconate Titanate Ceramics Prepared via the Sol Gel Process

Brieger

Merkle

Bertagnolli

et al. 1998

Ber Bunsenges Phys Chem

View full text Add to dashboard Cite

The sol gel process for the preparation of lead zirconate, lead titanate and lead zirconate titanate is studied by various experimental techniques, comprising solid state NMR methods, FT IR spectroscopy, D T M G and XRD. Two temperature ranges are examined that cover (i) the pyrolysis step from the solid gel to the amorphous oxide mixture and (ii) the calcination step from the amorphous state to the crystalline ceramics. I3C NMR and FT IR spectroscopy studies primarily are used to monitor the structural changes during the pyrolysis step. 207Pb NMR spectroscopy is employed to examine the development of the short range order at the lead nuclei over the whole temperature range. The latter studies clearly show that the observed changes in the short ran e order are accompanied by alterations in the long range order, as derived from the XRD data. In additi~n,"~Pb NMR experiments are performed on ceramic samples that were obtained via the sol gel or the mixed oxide route. It is demonstrated that these samples exhibit significant differences in the short range order, although the long range order was found to be the same, being independent of the actual preparation route.

show abstract

Preparation and properties of sol-gel derived nanostructured thin ceramic layers

Cited by 8 publications

References 5 publications

The Intersection of Design, Manufacturing, and Surface Engineering

The Intersection of Design, Manufacturing, and Surface Engineering

A differential anomalous X‐ray scattering study of the formation of lead zirconate titanate via sol‐gel process

Investigation of the Pyrolysis and Crystallization of Lead Zirconate Titanate Ceramics Prepared via the Sol Gel Process

Contact Info

Product

Resources

About