Influence of La2O3 content on the structural, mechanical, and radiation-shielding properties of sodium fluoro lead barium borate glasses

• Published in: Journal of materials science. Materials in electronics Vol. 32; no. 4; pp. 4651 - 4671
• Main Authors: El-Rehim, A. F. Abd, Shaaban, Kh. S.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.02.2021; Springer Nature B.V
• Subjects: Barium oxides; Characterization and Evaluation of Materials; Chemistry and Materials Science; Energy; Energy levels; Fluorides; Infrared analysis; Lanthanum oxides; Materials Science; Mechanical properties; Modulus of elasticity; Molar volume; Optical and Electronic Materials; Optical properties; Photoelectric effect; Photoelectricity; Radiation; Radiation shielding; Tetrahedra
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-020-05204-7

The techniques of melt-quenching were used to manufacture 53B 2 O 3 –2NaF–27PbO– ( 20 - x ) BaO– x La 2 O 3 ( 0 ≤ x ≥ 15 ) glass system. To check the status of these samples, the XRD diffractometer procedure was used. The molar volume of the glass system is decreased while density is increased. The current glass sample's mechanical properties depend on the glass structure. Ultrasonic velocity and elastic modulus (experimental and theoretical) of glass samples were observed to be increased. FT-IR analysis shows that with the increase of La 2 O 3 increases the changes of BO 3 to BO 4 and increases the degree of glass connectivity and the structural units of (BO 3 / 2 F) − tetrahedra are formed. It has been noted that the MAC values of glass samples are decreased to 1 meV, apart from a small increase at 0.1 meV. At low energy, this significant decline and small peak are directly linked to the current photoelectric effect. The sample with the highest La 2 O 3 content is owned the MAC's greatest values. It has been noted that the (HVL) and (TVL) increase with the increase in the photon energy and La 2 O 3 content rendering to the achieved results. It has been noted that the Z eff has the largest values at lower energy and at lowering concentration of La 2 O 3 content. It has been noted that EABFs and EBFs have originally lower values at low energy levels, because the photoelectric effect dominates and BaO is replaced by La 2 O 3 .