Density, Refractive Index, pH, and Cloud Point Temperature Measurements and Thermal Expansion Coefficient Calculation for PPG400, PE62, L64, L35, PEG400, PEG600, or PEG1000 + Water Systems

2021 ◽  
Author(s):  
Leonardo H. de Oliveira ◽  
Rafaela R. Pinto ◽  
Elias de S. Monteiro Filho ◽  
Martín Aznar
Keyword(s):  
Refractive Index ◽  
Thermal Expansion ◽  
Thermal Expansion Coefficient ◽  
Cloud Point ◽  
Expansion Coefficient ◽  
Water Systems ◽  
Temperature Measurements ◽  
Point Temperature ◽  
Cloud Point Temperature

Eco-Glass Based on Thailand Quartz Sands and Bismuth Oxide

2011 ◽  
Vol 695 ◽  
pp. 223-226 ◽  
Author(s):  
Krit Won-In ◽  
Sorapong Pongkrapan ◽  
Pisutti Dararutana
Keyword(s):  
Refractive Index ◽  
Thermal Expansion ◽  
Specific Gravity ◽  
Thermal Expansion Coefficient ◽  
Expansion Coefficient ◽  
Bismuth Oxide ◽  
Environmentally Friendly ◽  
Quartz Sands

Ecological glass with non-toxic was fabricated in bismuth-bearing glass using mainly local quartz sands and various concentration of bismuth oxide. The specific gravity (SG), refractive index (RI), thermal expansion coefficient (CoE) and hardness (HV) were determined. It was found that the values of SG, RI and HV were increased linearly as the increasing of bismuth oxide, whiles that of CoE was decreased. This glass is environmentally friendly materials.

scholarly journals Measurement and prediction of physical properties of aqueous sodium salt of L-phenylalanine

2017 ◽  
Vol 82 (7-8) ◽  
pp. 905-919 ◽  
Author(s):  
Sahil Garg ◽  
Mohd Shariff ◽  
Muhammad Shaikh ◽  
Bhajan Lal ◽  
Asma Aftab ◽  
...  
Keyword(s):  
Refractive Index ◽  
Thermal Expansion ◽  
Physical Properties ◽  
Thermal Expansion Coefficient ◽  
Expansion Coefficient ◽  
Sodium Salt ◽  
Viscosity Data ◽  
Aqueous Sodium ◽  
Mass Fractions ◽  
Increasing Temperature

Physical properties, such as density, refractive index and viscosity, of an aqueous sodium salt of (S)-2-amino-3-phenylpropionic acid (L-phenylalanine, Na-Phe) were investigated in this work. These properties were measured over a temperature range of 298.15?343.15 K at atmospheric pressure. The mass fractions (w) of Na-Phe were 0.05, 0.10, 0.15, 0.20, 0.25, 0.30, 0.35 and 0.40. The analysis of the experimental data showed that the values of density, refractive index and viscosity decreased with increasing temperature at any constant concentration of Na-Phe. However, these values increased with increasing concentration at any constant temperature. The density values were used to estimate the thermal expansion coefficient. The thermal expansion coefficient increased slightly with increasing temperature and concentration. The density and refractive index data were correlated using a modified Graber equation, while, the viscosity data were correlated using a modified Vogel?Tamman?Fulcher (VTF) equation. In all the cases, quantitative analyses of the influence of temperature and concentration were performed.

Property Control Of New Fluorinated Copolyimides And Their Applications

1991 ◽  
Vol 227 ◽  
Author(s):  
S. Sasaki ◽  
T. Matsuura ◽  
S. Nishi ◽  
S. Ando
Keyword(s):  
Refractive Index ◽  
Thermal Expansion ◽  
Thermal Expansion Coefficient ◽  
Expansion Coefficient ◽  
Optical Waveguides ◽  
Fluorine Content ◽  
Optical Filters ◽  
Optical Transparency ◽  
Low Thermal Expansion ◽  
Property Control

ABSTRACTNew fluorinated copolyimides are synthesized with 2,2′-bis(trifluoromethyl)-4,4′- diaminobiphenyl (TFDB) and a mixture of 2,2-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride (6FDA) and pyromellitic dianhydride (PMDA). The thermal expansion coefficient decreases with decreasing 6FDA content, because the hexafluoroisopropylidene group makes the main chain flexible. The refractive index decreases with increasing 6FDA content, because the fluorine content increases. The thermal expansion coefficient can be controlled between -0.5 × 10−5 and 8×10−5 /°C, and the refractive index can be controlled between 1.556 and 1.647 at 589.3 nm, by changing the 6FDA content. The polyimides and copolyimides from TFDB can be used in optical filters because of their high optical transparency and low thermal expansion coefficient. They are expected to be used in optical waveguides because of their high optical transparency and refractive index control.

scholarly journals Out-of-Plane Thermal Expansion Coefficient and Biaxial Young’s Modulus of Sputtered ITO Thin Films

Coatings ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 153
Author(s):  
Chuen-Lin Tien ◽  
Tsai-Wei Lin
Keyword(s):  
Thin Films ◽  
Thermal Expansion ◽  
Thermal Stress ◽  
Young’S Modulus ◽  
Thermal Expansion Coefficient ◽  
Expansion Coefficient ◽  
Young's Modulus ◽  
Heating Temperature ◽  
Glass Substrates ◽  
Ito Thin Films

This paper proposes a measuring apparatus and method for simultaneous determination of the thermal expansion coefficient and biaxial Young’s modulus of indium tin oxide (ITO) thin films. ITO thin films simultaneously coated on N-BK7 and S-TIM35 glass substrates were prepared by direct current (DC) magnetron sputtering deposition. The thermo-mechanical parameters of ITO thin films were investigated experimentally. Thermal stress in sputtered ITO films was evaluated by an improved Twyman–Green interferometer associated with wavelet transform at different temperatures. When the heating temperature increased from 30 °C to 100 °C, the tensile thermal stress of ITO thin films increased. The increase in substrate temperature led to the decrease of total residual stress deposited on two glass substrates. A linear relationship between the thermal stress and substrate heating temperature was found. The thermal expansion coefficient and biaxial Young’s modulus of the films were measured by the double substrate method. The results show that the out of plane thermal expansion coefficient and biaxial Young’s modulus of the ITO film were 5.81 × 10−6 °C−1 and 475 GPa.

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