Will the new Russian ceramic materials make sensors more environmentally friendly?
As a member of an international team of scientists, researchers from South Ural State University in Russia have synthesized ceramic materials suitable for manufacturing pressure, temperature, electric and magnetic field sensors. The material is more environmentally friendly and belongs to a multiferroic alloy.
The latest research in the field of materials science aims to study the properties and structure of multiferroic materials. These materials have both magnetic and electrical properties, so their electrical properties can be controlled by magnetic action, and vice versa.
For mass production, the main goal today is to find a cheap and convenient material that has magnetoelectric interaction, polarization, and magnetization, while meeting environmental standards. Many modern materials contain lead, but its widespread use can cause environmental pollution and negatively affect human health.
Scientists engaged in the development of modern materials at South Ural State University believe that ceramics based on bismuth ferrite can meet modern requirements. The preparation of materials in the form of ceramics makes it possible to relatively quickly synthesize various chemically substituted compositions with starting ions, and to evaluate the effect of chemical substitution on the structure and properties of this material.
A research team composed of SUSU Dmitry Karpinski, Sergey Trukhanov and Alexei Trukhanov, using bismuth ferrite (BiFeO3) material (one of the most promising multiferroic compounds) instead of iron and bismuth ions, studied the structural phase transition of BiFeO3-BaTiO3 ceramics and discovered how the properties of the material change according to the type of structural deformation. The data obtained will allow the development of new functional materials based on complex oxide systems.
"We use innovative chemical alternatives to synthesize materials. The choice of chemical composition makes it possible to synthesize ceramic components with so-called metastable structural states. These materials are highly sensitive to external factors such as temperature, electric potential and temperature, magnetic fields and pressure In other words, they can be used as sensors for external influences.” In the Department of Materials Science, Physics and Material Chemistry (School of Materials Science and Metallurgical Engineering, Faculty of Engineering and Technology) Dmitry Ka Dmitry Karpinsky explained.
This study was joined by scientists from SUSU, and was attended by representatives of the Ural Federal University, Łódź Technical University (Poland) and Aveiro University (Portugal). In science centers abroad, experiments such as studying the structure of material components through electron and atomic force microscopes have been conducted. SUSU analyzed the structure of the composition by X-ray diffraction method.
From bulk ceramics to thin films
At the end of the study, the scientists revealed the relationship between the type and size of structural distortions that depend on the concentration of replacement ions. It determines the piezoelectric properties (the polarization of the material under mechanical stress). Data are obtained in various temperature and substitution ion concentration ranges. Based on the obtained results, a phase diagram was made.
"After selecting the best equivalent plan and conducting a comprehensive analysis of the structure and properties of the resulting material, work will be carried out to obtain the known chemical composition in the form of a thin film, because of course this form of material is required in most cases. It’s too early to talk about mass production, but as part of the technological development, we plan to obtain trial batches of the material, which will allow us to evaluate the prospects of this material in the market. And the scalability of this synthesis technology Sex," Dmitry Karpinsky added.
The materials synthesized by the scientists can be used to manufacture sensors for external factors and magnetostrictive and piezoelectric elements.
This article is from Allicdata Electronics Limited which offer electronic components, semiconductors, antennas, capacitors, connectors, diodes, transistors, IC,resistors. For more product information, please go to the website to get it.