Year: 2025
Type: article
Abstract: Novel Zn 1-3(x+y) ▢ x+y Fe 2x RE 2y WO 4 , where RE = Ho 3+ , Er 3+ , Yb 3+ , x = 0.005, 0 < y ≤ 0.015, and ▢ represents vacancies in the crystal lattice. Solid solutions were successfully synthesized by the traditional solid-state reaction method using ZnO, Fe 2 O 3 , RE 2 O 3 and WO 3 as the initial reactants. Doped materials were extensively characterized by powder X-ray diffraction (XRD), differential thermal analysis-thermogravimetry (DTA-TG) methods, scanning electron microscopy (SEM–EDX), infrared (FT–IR), and ultraviolet–visible–near infrared (UV–vis–NIR) spectroscopies. The results revealed that all doped samples were phase pure with grain sizes practically not exceeding 10 µm, exhibiting uniform morphology. New materials belong to the wolframite-type structure with space group P 2/ c . Furthermore, activated by Fe 3+ and RE 3+ ions materials also demonstrated high thermal stability up to max. 1180 °C. They exhibit strong absorption in the ultraviolet range, and some of them (RE = Ho 3+ and Er 3+ ) also in the visible light. A detailed analysis of the UV–Vis–NIR spectra revealed that doped zinc tungstates possessed a direct optical band gap whose value is close to 3 eV. All these features make the new doped wolframite-type solid solutions promising candidates for multifield applications.
Authors: Magdalena Kotfica, Elżbieta Tomaszewicz, Paweł Kochmański
Institution: West Pomeranian University of Technology in Szczecin
Language: English
Subfield: Polymers and Plastics
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,790
OpenAlex ID: W7106656305