The results of studies high-frequency electromagnetic properties alkaline borosilicate glasses modified with lanthanum, titanium, and zirconium oxides concerning their structure are presented. values the spectral reflection transmission coefficients experimentally measured in frequency range 12–18 GHz. article presents typical spectra complex dielectric constant studied glass samples inthe 20 H...

In this study, lanthanum boron silicate glasses were prepared with a composition of x Li2O-(60-x)B2O3-5CaO- 5BaO-7ZnO-10SiO2-10La2O3-3Y2O3 where = 1,3,5,7, and 9 mol%. Each was melted in platinum crucible under atmospheric conditions at 1,400 °C for 2 h. Clear transmittance exceeding 85 % fabricated. Their optical, thermal, physical properties, such as refractive index, Abbe number, density, gl...

The wetting process of a ceramic substrate (Al2O3) with and without carbon coating by means aluminum-based alloys has been investigated. A mathematical simulation that predicts wettability in the systems under study is proposed, taking into account diffusional effects used constituents. prediction compared experimental results obtained for same question. From obtained, it was found liquid dropl...

Glasses are promising functional materials as phosphors with an aim to use in radiation measurements because of easy shaping, low fabrication cost and large volume possibility. In this study, Eu3+-activated gallate glasses having glass compositions 20K2O–11La2O3–(69−x)Ga2O3–xEu2O3 (x = 0.1–1.0) were synthesized, their photoluminescence, scintillation thermoluminescent characteristics investigat...

Як відомо, фазові рівноваги в багатокомпонентних оксидних системах є фізико-хімічною основою створення нових матеріалів з покращеними властивостями. У представленій роботі досліджено потрійній системі CeO2–La2O3–Dy2O3 усьому інтервалі концентрацій. ході проведеного дослідження побудовано ізотермічний переріз діаграми стану системи за температури 1100 °С. Отримані результати свідчать про відсутн...