New Scientific Publication from FunGlass Researchers in Ceramics International

We are proud to share that researchers from the FunGlass Centre have published a new scientific article in the journal Ceramics International. The study was led by Monika Michálková from the FunGlass VILA department (Joint Glass Centre of the IIC SAS, TnUAD, FChPT STU).

The research team also included Marzieh Ghadamyari, Milan Parchoviansky, Robert Klement, Andrea Cibrínová, Jozef Kraxner, and Dušan Galusek. All authors are affiliated with the FunGlass Centre.

Read here:https://doi.org/10.1016/j.ceramint.2025.12.230

The study focuses on the incorporation of phosphor particles—specifically partially crystallised YAG:Eu²⁺/³⁺ microspheres—into glass matrices with different refractive indices. These advanced composite materials, known as phosphor-in-glass (PiG), were prepared using a viscous flow sintering method.

A key part of the research involved detailed thermal analysis (TG/DTA) to determine the glass transition and crystallisation temperatures of each glass composition. These parameters are crucial for optimizing the sintering process, which was successfully conducted below 700 °C to preserve the desired microstructure and optical performance.

The results clearly demonstrate that the optical performance of phosphor-in-glass materials strongly depends on the refractive index match between the phosphor particles and the glass matrix. The highest luminescence intensity was achieved when the refractive indices were closely aligned. In contrast, increasing mismatch between the two led to a gradual decrease in emitted light intensity.

These findings provide valuable insights for the design of high-performance luminescent materials, with potential applications in advanced lighting technologies and photonic devices.

This work was funded by the EU NextGenerationEU programme through the Recovery and Resilience Plan for Slovakia (LumiPiG, project No. 09I03-03-V04-00198).