Dr Haixue Yan
PhD, PGCAP, MACS, CEng, FIMMM and FRSC
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Current Funded Research Projects
Lead-free ferroelectrics for piezoelectric sensors or high power energy storage: Professor Jiagang Wu
Start: 31-03-2020 / End: 30-09-2023
At present, Pb-based ceramics are dominant ferroelectric materials. However, toxic Pb is harmful to human beings and the environment. It is urgent to research Pb-free ferroelectrics to match the need of different applications. In this project, we will research high-performance lead-free ferroelectrics for piezoelectric application and dielectric energy storage.
Start: 11-07-2019 / End: 15-07-2023
The aim of this project is to research effect of Rb substitution on structures and properties of ferroelectrics for high power energy storage and memory applications.
Start: 16-07-2018 / End: 15-07-2023
Ferroelectrics are materials characterized by a Curie point and polarization switching. The Curie point sets the upper limit on the application of ferroelectric ceramics for piezoelectric applications. The aim of this project is develop Rb-based ferroelectric ceramics for high temperature piezoelectric applications.
Start: 31-10-2018 / End: 31-03-2023
The Business of Fashion, Textiles and Technology (BFTT) is a five-year industry-led project, which focusses on delivering sustainable innovation within the entire fashion and textile supply chain. The aim is to foster a new, creative business culture in which fashion, textiles and technology businesses can use R&D as a mechanism for growth.
Previous Funded Research Projects
Start: 01-05-2022 / End: 06-12-2022
The aim of this project is to develop a technology that recycles Al and Cu waste metals to make final products directly using a sustainable source of energy (solar). Specifically, we will recycle Cu in waste cables and Al from drinks cans.
Start: 08-06-2020 / End: 07-12-2021
The principal aim of the project is to deliver a renewably powered machine that can transform rescued aluminium cans into hardware. We are working with Elvis & Kresse to develop an Open Source micro solar forge. The specific goal was to create an inexpensive technology that would allow Elvis & Kresse to collect littered aluminium cans and transform them into hardware (buckles, D-Rings etc.) for their range. https://bftt.org.uk/funded_project/elvis-kresse-metal-forge-elvis-and-kresse/
Start: 01-03-2018 / End: 30-03-2021
Composites including thermoelectric MgAgSb and ferroelectric nanoparticles (PbTiO3 and BaTiO3) will be fabricated via spark plasma sintering. The spontaneous polarization from ferroelectric ordering can tailor the carrier concentration and mobility of the matrix. In addition, ferroelectric nanoparticles can also scatter long/medium wavelength phonons, and improve the thermoelectric transport properties.
Start: 26-05-2017 / End: 26-05-2019
Dielectric capacitors play an essential role in advanced energy storage and electrical power pulse electronic systems and related devices due to their ultrahigh power density and ultrafast charge and discharge speeds. This aim of this project is develop Rb-based dielectric for high power energy storage.
Start: 15-01-2016 / End: 15-02-2016
Multiferroic (MF) materials with simultaneous ferroelectricity and magnetism hold great potential for novel applications. However, it remains a big challenge to find proper single-phase materials with significant magnetoelectric coupling at room temperature. Our aim is to understand the physics of MF and to achieve strong ME effects at room temperature.
Start: 01-09-2013 / End: 31-08-2015
For an automotive combustion engine only 35% of the energy produced is harnessed for motive power, with 65% of the energy being effectively 'lost' to the environment - 25% of that lost energy is transferred into the exhaust gases. For a typical 100hp (75kW) engine, the waste heat energy is ...
Other Research Projects
High-temperature piezoelectric sensing technology is of major importance to the chemical and material processing, automotive, aerospace, and power generating industries. Ferroelectrics are desirable for piezoelectric application below their Curie points. Ferroelectric polycrystalline ceramics have the advantages over piezoelectric/ferroelectric single crystals of lower cost and the possibility to control, by …
Ceramics are normally processed by the consolidation of powders by sintering at high temperatures. The time required for this process is usually measured in hours because of the slow rate of heating/cooling of the furnaces used. Spark Plasma Sintering (SPS), as it is commonly referred to, is a rapid …
There is currently a great interest in size effects in materials. There are many properties that change dramatically when the grain size or component dimensions are below 100 nm. A wide range of nanoscale ceramic powders have been synthesised with dimensions in the nanometre range. However, during conventional sintering the grain …
Lead oxide based ferroelectrics, represented by lead zirconate titanate (PZT), are the most widely used materials for piezoelectric actuators, sensors and transducers due to their excellent piezoelectric properties when their compositions are close to morphotropic phase boundary (MPB). PZT contains more than 60 wt% lead, which is harmful and toxic. There …
Using Spark Plasma Sintering (SPS) is is possible to process new composites, with new windows of properties, that were previously not possible to fabricate using conventional processing routes, non-equilibrium composites. When two non-equilibrium phases are processed by conventional sintering they react to form the equilibrium phases. This is used to …