Preparation and properties of transparent SnO–P2O5 glasses

Kubo

Takebe

et al. 2008

Binary SnO-P2O5 (SP) glasses with 52-72 SnO mol% were examined. Glass transition temperature, density, refractive index and absorption edge were studied for transparent SP glasses. The structure of SP glasses was evaluated by FT/IR and Raman spectroscopy. The water durability was investigated by weight loss and Raman spectroscopy for SP glass samples immersed in distilled water at 30-70°C. Raman spectra indicated in the immersion test that Q 1 units form and Q 2 units decrease as a result of water attack upon the phosphate chains with increasing immersion time in 62SnO·38P2O5 glass and no structural change was observed in 72SnO·28P2O5 glass. The relationship between the properties and glass structure with chemical bonding is discussed.

Section: Relation Between Properties and Structurementioning

confidence: 99%

Compositional dependence of properties of SnO-P2O5 glasses

Kubo

Takebe

et al. 2008

“…The amount of thermal contraction is calculated by using the equation of α = (1/L0)dL/dT where α is the thermal expansion coefficient of the SP glass (= 1.4 × 10 -5°C-1 ), 5) Lo is the 120 nm depth of the fabricated pattern at room temperature, dT is the difference between imprinting temperature and room temperature (20°C). The calculated pattern contraction dL is ~0.4 nm.…”

Section: Resultsmentioning

confidence: 99%

Effect of thermal imprinting conditions on fabricated micro/nano patterns in tin phosphate glass

Takata

Nakamura

et al. 2009

Thermal imprinting conditions of low-softening tin phosphate glass with a composition of 67 mol% SnO-33 mol% P2O5 were investigated using three processing parameters of temperature, imprinting pressure, and holding time. Fabrication conditions of a micro square grid (SG) pattern with a similar depth of silica mold (~120 nm) were optimized. AFM observations confirmed that the 700 nm × 700 nm SG pattern with ~120 nm depth could be formed with good reproducibility.

“…Besides, the OH contents of A-SP glasses are 10-20 ppm lower than those of C-SP glasses. Figure 6 shows Raman spectra of (a) C-SP 8) and (b) A-SP glasses. The PO4 tetrahedral unit was changed from Q 2 to Q 1 when SnO concentration was increased, where i in Q i represent the number of bridging oxygen per phosphate tetrahedron.…”

Section: Evaluationsmentioning

confidence: 99%

“…In this study, transparent SnO-P2O5 (SP) glasses 8) were prepared by melting in alumina and carbon crucibles at difference temperatures. The PEC of SP glasses was measured using a frequency stabilized transverse Zeeman He-Ne laser (STZL).…”

Section: Introductionmentioning

confidence: 99%

Compositional dependence of photoelasticity of tin phosphate glasses

Kawano

Takebe

et al. 2008

The photoelastic constants (PECs) of transparent SnO-P2O5 (SP) glasses with 52-72 mol% SnO were determined using a frequency stabilized transverse Zeeman He-Ne laser (STZL) at 633 nm. The SP glass samples were melted at 950°C in carbon crucibles and at 1050°C in alumina crucibles. The melting conditions affect the values of glass transition temperature and OH content but have almost no effect on PEC. The PEC varies monotonically with increasing SnO concentration from -0.73 to -1.98 × 10 -12 Pa -1 .