Low-Expansion Borosilicate 3.3: Boron Trioxide Network Former Chemistry
How substituting alkali fluxes with boron trioxide (B2O3) lowers coefficient of thermal expansion down to 3.25 x 10⁻⁶ /°C.
September 29, 2026 • 7 min read
FIELD MONOGRAPH • Autumn 2026
Glass transition transformation temperature (Tg), thermal expansion birefringence, and optical striae elimination.
The Scandinavian Monograph of Borosilicate Annealing, Lehrs & Optical Homogeneity. We investigate empirical formulations, material longevity, and laboratory-verified methods.
Curated Dispatches
Photoelastic Stress Analysis: Crossed Polarizers and Full-Wave Retardation Plates
Using colored interference fringes to quantify residual mechanical tension and compression along flame-worked glass joints.
September 18, 2026 • 9 min read
Optical Striae Elimination: High-Temperature Platinum Stirrers in Glass Melts
Overcoming localized refractive index cords and striae in raw glass crucibles through mechanical convection mixing at 1550°C.
September 07, 2026 • 6 min read