Microwave-driven exsolution (ACS nano, 2023)

Discover the innovative approach to creating metallic nanoparticles with our latest study, ” Microwave-Driven Exsolution of Ni Nanoparticles in A-Site Deficient Perovskites,” published in November 2023 in ACS Nano, American Chemical Society.

Exsolution has emerged as a promising method for generating metallic nanoparticles, surpassing traditional deposition methods such as impregnation in terms of robustness and stability.

Here, we demonstrate the exsolution of catalytically active Ni nanoparticles driven by microwaves in the absence of hydrogen or low pressures. With the aid of microwaves, we were able to generate these exsolved nanoparticles at milder temperatures and shorter exposure times than conventional thermal exsolution.

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Microwave cavities and resonators

Microwave cavities and resonators are essential components at microwave frequencies, known for their ability to confine and control electromagnetic energy. Typically made of metal, microwave cavities are designed to resonate at specific frequencies and are characterized by a high-quality factor (Q-factor), which measures their energy storage efficiency. Resonators can take various forms, including cylindrical, spherical, and rectangular, each optimized for different applications.

Beyond communication systems, microwave cavities are used in radar, satellite technology, dielectric and magnetic material measurements, and microwave heating applications. For example, they are core components in microwave ovens, where they generate and sustain high-frequency electromagnetic fields to heat materials.

With extensive expertise in microwave cavities and resonance measurements, ITACA-DIMAS offers on-demand design and precision manufacturing of microwave cavities. These are tailored for accurate dielectric or magnetic measurements, sensors, or microwave processing of materials to meet specific requirements.

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Microwave Technology for Sintering High-Quality Materials (ACT, 2014)

Discover the potential of microwave technology in material sintering with our study, ” Microwave, Spark Plasma and Conventional Sintering to Obtain Controlled Thermal Expansion β-Eucryptite Materials,” published in July 2014 in the International Journal of Applied Ceramic Technology.

In this work, lithium aluminosilicate was fabricated by three different methods: conventional, spark plasma and microwave sintering, from 1200 to 1300°C.

Microwave technology developed by DIMAS made possible to obtain fully dense glass-free lithium aluminosilicate bulk material (>99%) with near-zero and controlled coefficient of thermal expansion and excellent mechanical properties (7.1 GPa of hardness and 110 GPa of Young’s modulus).

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Numerical Techniques and EM Modelling

In this field, we conduct theoretical research in numerical methods for electromagnetic modelling, both for open and closed microwave structures. These numerical procedures enable us to design various components, such as microwave cavities, dielectric measurement probes, filters, duplexers, and more.

Microwave modeling is crucial in advancing microwave technology, as it allows for the accurate simulation and analysis of microwave circuits, systems, and components. By creating detailed models, engineers can predict performance, identify potential issues, and optimize designs before prototypes are built. This not only accelerates the development process but also reduces costs and enhances the reliability and efficiency of microwave devices. Furthermore, microwave modeling plays a key role in exploring innovative applications, from telecommunications to medical diagnostics, ensuring that new technologies are both feasible and effective.

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Open-ended coaxial probes

Open-ended coaxial probes are widely used at microwave and RF frequencies due to their precision and non-destructive testing capabilities.

In material characterization, these probes measure the dielectric properties of solids, liquids, and biological tissues, which is essential for advancements in electronics, telecommunications, materials, and medical diagnostics. For instance, they help to determine the properties of new materials like ceramics and polymers, analyze liquids in chemical and pharmaceutical processes, and study the dielectric properties of biological tissues for medical research and device development.

In industrial quality control and sensors, open-ended coaxial probes can ensure the consistency and quality of materials during manufacturing. They monitor composite materials in the aerospace and automotive industries, verify the properties of ceramics, and measure moisture content in food products like grains and dairy to maintain quality and extend shelf life.

With extensive expertise in coaxial circuits and resonance measurements, ITACA-DIMAS offers on-demand design and precision manufacturing of microwave open-ended coaxial probes tailored for accurate dielectric or magnetic measurements, sensors, or microwave processing of materials to meet specific requirements.

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