Effects of Doping Trivalent Ions in Bismuth Borate Glasses

Abstract

Bismuth borate glasses from the system: 40Bi2O3–59B2O3–1Tv2O3 (where Tv=Al, Y, Nd, Sm, and Eu) and three glasses of composition: 40Bi2O3–60B2O3, 37.5Bi2O3–62.5B2O3 and 38Bi2O3–60B2O3–2Al2O3 were prepared by melt quenching and characterized by density, UV‐visible absorption spectroscopy and differential thermal analysis (DTA) studies. Bismuth borate glasses exhibit a very strong optical absorption band just below their absorption edge. Glasses were devitrified by heat treatment at temperatures above their glass transition temperatures and the crystalline phases produced in them were characterized by Fourier transform infrared (FTIR) absorption spectroscopy and X‐ray diffraction (XRD). Bi3B5O12 was found to be the most abundant phase in all devitrified samples. DTA studies on glasses and FTIR and XRD analysis on crystallized samples revealed that very small amounts of trivalent ion doping causes significant changes in the devitrification properties of bismuth borate glasses; rare‐earth ions promote the formation of metastable BiBO3–I and BiBO3–II phases during glass crystallization.

Glass formation and structure of glasses in B2O3―Bi2O3―MoO3 system

“…Later, this problem was discussed again in a set of three component bismuth-borate glasses and was proved also the specific role of Bi 2 O 3 [22][23][24][25][26][27][28][29][30][31]. The collected data on several outstanding properties like high density, refractive index and very high coefficient for nonlinear phenomena (second and third harmonic generation) made these systems very attractive from a practical point of view [22][23][24][25][26][27][28][29][30][31][32].…”

Surface crystallization of stoichiometric glass with Bi₂ZnB₂O₇ crystal using ultrasonic surface treatment followed by heat treatment

“…In this paper, the authors focused on orthorhombic Bi 2 ZnB 2 O 7 (BZB) phase (Pba2 space group) 13) precipitated from ternary Bi 2 O 3 ZnOB 2 O 3 glasses, which has a melilite-type structure consisting of Bi 3+ layers and zinc borate sheets with cornershared triangular BO 3 , tetrahedral ZnO 4 and BO 4 units. The NLO evaluation was also reported for powder sample, and the effective value of 4.0 relative to KDP standard 13) expects a considerable evaluation even in glass-ceramic form.…”

Synthesis and characterization of boron-doped bismuth oxide-erbium oxide fiber derived nanocomposite precursor

“…The peaks in the first two ranges were due to the B-O stretching vibrations of triangular heat treated BO 3 structures and electrospun tetrahedral [BO 4 ] À boron structural units, respectively, while the peaks in the third range were due to B-O and Bi-O bond bending vibrations. 40,41 The vibration absorption bands due Bi-O-Bi (840 cm À1 ) were clearly observed in the FT-IR spectrum both for boron undoped and doped ceramics. 42 The band observed at 700 cm À1 originates due to the bending vibration of B-O-B in [BO 3 ] triangles and the infrared broad band at 1310 cm À1 assigned to B-O À stretching vibration for boron doped nanocrystalline sintered ceramic powder.…”