2024-03-29T15:20:40Zhttps://repositori.uji.es/oai/requestoai:repositori.uji.es:10234/1746932023-12-20T17:38:28Zcom_10234_7053com_10234_9col_10234_146250
00925njm 22002777a 4500
dc
Carretero Cerdán, Alba
author
Peiro-Franch, Anna
author
Torres Iglesias, Rocío
author
Trigueros Navarro, Lara
author
Cordoncillo, Eloisa
author
Beltrán Mir, Héctor
author
2017
Advanced solid materials are present in a large quantity of fields of our quotidian live. All the electronic
devices surrounding us, such as mobile phones, computers or appliances are made up of many
different materials: ceramics, metals, polymers, etc. The recent development of advanced ceramic
materials to be applied in electronic devices, which require high performances as well as relatively
economic syntheses and environmentally friendly characteristics, is a wide field in Materials
Chemistry.
It is important to motivate students to this area, so that, they can understand the
importance of the chemistry and the material science in our society.
In the present contribution, we
would like to relate our experience giving a
comprehensive laboratory session intended for all
undergraduate chemistry students.
Piezoelectric compounds can be defined as materials that produce some electric charge when a
mechanical stress is applied (direct effect) or suffer a mechanical deformation
when an electric field is
applied (reverse effect). These materials are used in several devices such as lighters, speakers,
sensors or sonars. Lead zirconate titanate [Pb(Ti
1-x
,Zr
x
)O
3
] (PZT) is the most studied and
commercialized ceramic piezoelectric mat
erial due to their excellent characteristics. Relation between
structure
-composition
-properties of this material and its easy preparation makes it suitable to use in
low value added devices.
In this work, we propose an example to
understanding this technology based on the components of a
speaker of a musical birthday card, in particular the piezoelectric component, including the chemistry
that is involved in these types of devices. Two common characterization techniques in Solid State
Chemistry are also int
roduced to the students: X
-Ray Diffraction and Electron Microscopy. Moreover,
the discovery by the students of the presence of this type of material in this simple device offers a
possibility to motivate them to learn these sciences, and allow them to know
the importance of the
Solid State Chemistry and the Materials Science in our society.
Different educational methodologies may be used to study and understand these materials with
piezoelectric properties. Problem Based Learning (PBL) is a widely applied approach intended to
encourage students to learn through the structured exploration of a research problem. Currently this
particular system has become a valid teaching method in high schools, where students are
encouraged to develop a real research project.
The PBL methodology used in this work represents an
improvement in the content of the knowledge while simultaneously it fosters the development of
communication, problem
-solving, and self
-directed learning skills.
This work can also be interesting for tea
chers of inorganic chemistry and material science and
undergraduate students owing to its pedagogical character.
CARRETERO CERDÁN, Alba; PEIRÓ FRANCH, Anna; TORRES IGLESIAS, Rocío; TRIGUEROS NAVARRO, Lara; CORDONCILLO, Eloísa; BELTRÁN MIR, Héctor. (2017). A simple approach to understand solid state chemistry with the example of a piezoelectric material incorporated in a birthday card. EDULEARN17 Proceedings: 9th International Conference on Education and New Learning Technologies Dates (3-5 July, 2017, Barcelona, Spain), p. 7559-7568
978-84-697-3777-4
http://hdl.handle.net/10234/174693
http://dx.doi.org/10.21125/edulearn.2017.0365
Problem Based Learning
Piezoelectric materials
Solid State Chemistry
Material Science
A simple approach to understand solid state chemistry with the example of a piezoelectric material incorporated in a birthday card