INVESTIGADORES
SOLDATI Analia Leticia
congresos y reuniones científicas
Título:
DEVELOPMENT OF NEW CHARACTERIZATION TECHNIQUES: DESIGN AND COMMISSIONING OF A CELL FOR SIMULTANEOUS XRD AND CONDUCTIVITY IN-SITU MEASUREMENTS.
Autor/es:
NAPOLITANO, FEDERICO; SOLDATI, ANALIA L.; GECK, JOCHEN; GIEBELER, LARS; FERNANDEZ ZUVICH, AFRA; SERQUIS, ADRIANA C.; CANEIRO, ALBERTO; MOGNI, LILIANA V.
Lugar:
Mar del Plata
Reunión:
Conferencia; AACr 2014; 2014
Institución organizadora:
Asociación Argentina de Cristalografía
Resumen:
The design and development of
new experimental techniques has been mostly driven by the need to gain a deeper
insight into the material?s properties, which could be used for fundamental or
applied research. Recent advances on materials characterization techniques have
provided new platforms that enable the in-situ
study of crystallographic, mechanical, electronic, and electrochemical
properties under a wide range of environmental conditions, not only for
fundamental research but also in order to recreate a more realistic environment
in the case of applied research [1], [2], [3].
In this context, the
development of a device that enable the characterization of several properties
simultaneously under controlled atmospheres in a wide range of temperatures
represents an advantage over the traditional independent measurements since
those properties could be strongly correlated. As an example, in the Solid
Oxide Fuel Cells (SOFC) framework, the electrode materials have to present good
electronic and ionic transport properties and also a good electrochemical
response to certain electrocatalytic reactions, being all these properties
strongly dependent of their crystallographic and electronic structures [4].
In this work we present the
design and implementation of a new high temperature cell that allows to, in a
first step, perform X-ray diffraction (XRD) and electrical conductivity
measurements simultaneously, between room temperature and 900 °C in an oxidizing,
inert or vacuum atmospheres. Its design was conceived with several constrains:
-
It should be easily adapted to a working Anton Paar
HTK 1200 high temperature chamber.
-
It should be portable in order to be carried to
synchrotron beamlines.
-
It should be versatile, in the way that several
experimental techniques can be used without changes in the cell configuration:
in-house or synchrotron XRD, X-ray absorption spectroscopy (XANES/EXAFS),
electrical conductivity, and electrochemical impedance spectroscopy.
The first tests on this cell have been performed on
an in-house Panalytical Empyrean diffractometer with Pixcel 3D detector,
running simultaneous XRD and conductivity measurements