Objective
The objective of the present project is the study of the grain-size effect on the di-, ferro- and piezoelectric characteristics of alkali niobate nanocrystalline piezoceramics. This material system has attracted much attention in recent years due to the potential of being a environment friendly alternative to the lead containing compositions on the basis of lead-titanate-zirconate. For these traditional piezoelectric ceramics the effect of crystallite size on the electric properties is quite well understood.
In the case of alkaline niobates, however, almost no information is available in the scientific literature. The proposed project therefore aims to systematically treat this subject. For this purpose nanosized powders with an average particle size i n the range of 10 to 100 nm will be prepared by micro-emulsion mediated synthesis. This synthesis approach allows the synthesis of tailor made ceramic particles with a very narrow particle size distribution, since nucleation and growth during particle formation are confined to the volume of individual micelles, acting as nanoreactors. Dense nanocrystalline bulk ceramics, with a wide range of grain-sizes from approximately 100nm up to several microns will be prepared by pressure assisted consolidation in order to reduce the extend of grain growth during sintering.
Powders and ceramics will be characterized, with respect to purity, composition, crystallite size using X-ray diffraction, electron microscopy (SEM, TEM, HR-TEM) and chemical analytical means (IC P-OES, Raman-spectroscopy) in order to optimise the processing procedure. The functional characterization of the ceramics will comprise dielectric spectroscopy, measurements of the ferroelectric hystereses and piezoelectric measurements over the whole temperature range of piezoelectric activity. The expected outcome of the present research is an extensive description and understanding of the size effect in lead free piezoceramics based on alkali niobates.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- agricultural sciences agriculture, forestry, and fisheries agriculture grains and oilseeds
- natural sciences physical sciences optics microscopy electron microscopy
- engineering and technology materials engineering ceramics
- natural sciences physical sciences optics spectroscopy
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Keywords
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
FP6-2002-MOBILITY-5
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Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
Germany
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.