Glass formation in the system Li₂B₄O₇–Pb₃O₄–CuO using X-ray diffraction

Abstract

X-ray diffraction was performed to construct the phase diagram for the ternary Li₂B₄O₇–Pb₃O₄–CuO glass system. Three principal regions were identified: (1) a glass-forming region observed at the composition (75 < Li₂B₄O₇ < 100) mol%, (0 < CuO < 35) mol% and (0 < Pb₃O₄ < 70) mol% in the ternary system, and (100 − x) mol% Li₂B₄O₇–x mol% Pb₃O₄ where x = 0 up to 70, (100 − y) mol% Li₂B₄O₇–y mol% CuO where y = 0 up to 25 in the binary system;. (2) a crystalline region: all compositions prepared from the binary system Pb₃O₄–CuO and the ternary system containing Li₂B₄O₇ up to 60 mol%; (3) a partially crystalline region formed between the glass and crystalline regions.

Keywords:

• phase diagram
• X-ray diffraction
• oxide glass
• lithium lead borate glass containing copper oxide