Effect of pressure on the refractive index and relative density of the CaO·Al2O3·6SiO2 glass

Kuryaeva, R. G.

doi:10.1016/j.jnoncrysol.2008.11.020

Cited by 13 publications

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“…Interferometer‐based systems have been used to measure the refractive index or its variation 9–14. Other methods including return loss2 and Abbé refractometer4,15 have also been used.…”

Section: Introductionmentioning

confidence: 99%

Effect of packing pressure on refractive index variation in injection molding of precision plastic optical lens

Yang¹,

Su²,

Huang³

et al. 2011

Adv Polym Technol

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ABSTRACT:In this study, refractive index variation in injection-molded polymethylmethacrylate optical lenses under different levels of packing pressure was evaluated using a Shack-Hartmann wavefront sensor-based metrology system. The experimental results showed that optical polymer's refractive index exhibits a considerable amount of variation for the lenses molded under different packing pressures. Specifically, within the range investigated in this study, refractive index variation is more uniform when higher packing pressure was used but less so for lower packing pressure. Refractive index variation is believed to be the result of density variation, which itself is caused by shrinkage variation at different packing conditions. In addition, using density information in the plastic lenses predicted by finite element simulation, refractive index variation was numerically determined using the differential Lorentz-Lorenz equation and the results were in good agreement with the experiments conducted in this research. C

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Section: Introductionmentioning

confidence: 99%

Effect of packing pressure on refractive index variation in injection molding of precision plastic optical lens

Yang¹,

Su²,

Huang³

et al. 2011

Adv Polym Technol

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“…Fig. 1 shows the pressure-induced changes in the relative density of NaAlSi 3 O 8 glass [Kuryaeva, Surkov, 2010] together with the data for CaAl 2 Si 6 O 16 glass [Kuryaeva, 2009]. It is seen from fig.…”

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confidence: 93%

“…Experimental technique and results. Glasses of Na 2 O•Al 2 O 3 •6SiO 2 and CaO•Al 2 O 3 •6SiO 2 compositions were synthesized and studied in the works [Kuryaeva, 2009;Kuryaeva, Surkov, 2010].…”

Section: Introductionmentioning

confidence: 99%

“…The obtained results are discussed from the point of view of the different degree of polymerization of their structural network.Experimental technique and results. Glasses of Na 2 O•Al 2 O 3 •6SiO 2 and CaO•Al 2 O 3 •6SiO 2 compositions were synthesized and studied in the works [Kuryaeva, 2009;Kuryaeva, Surkov, 2010].The refractive index at high hydrostatic pressures was measured by the technique described in detail in our previous works Kuryaeva, Kirkinskii, 1997;1998, with the use of the polarizing interference microscope МРI-5 and the apparatus with the diamond anvils. The measuring method of the refractive indices of sample n x under pressure is based on the pressure-induced change in the optical path difference Ф caused by the sample under study.…”

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confidence: 99%

“…2 shows the linear approximation of dependencies of relative changes in density (d-d 0 )/d on the degree of depolymerization NBO/T for glasses of the system СaO•Al 2 O 3 •xSiO 2 (x=2, 4, 6) at Р = 3, 4 and 5 GPa. The values of the relative change in density and the degree of depolymerization were obtained and calculated in Kuryaeva, 2008;2009;Kuryaeva et al, 2007;. If the degrees of depolymerization are estimated correctly, these dependencies must, most likely, be appropriate for glasses of the system Na 2 O•Al 2 O 3 •xSiO 2 .…”

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confidence: 99%

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Effect of alkaline and alkaline-earth cations on the compressibility of aluminosilicate glasses

Kuryaeva¹

2011

Vestn. Otd. nauk Zemle

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Effect of alkaline and alkaline-earth cations on the compressibility of aluminosilicate glassesR. G. Kuryaeva V. S. Sobolev Institute of Geology and Mineralogy of the Siberian Branch of the RAS, Novosibirsk rufina@igm.msc.ru, tel.: 8 (383) 333 0899 Key words: aluminosilicate glasses, high pressures, compressibility of glasses and melts, structure of glasses and melts. Citation: Kuryaeva R.G. (2011), Effect of alkaline and alkaline-earth cations on the compressibility of aluminosilicate glasses, Vestn. Otd. nauk Zemle, 3, NZ6061, doi:10.2205/2011NZ000191. Introduction.Glasses are models of deep-seated melts. Of special interest are glasses that along with other oxides contain Al 2 O 3 .The traditional model for the structure of alkali (alkaline-earth) aluminosilicate glasses holds that aluminum goes into tetrahedral coordination as a network former when the molar ratio Al 2 O 3 /M(M 2 )O=1. The cations of alkaline and alkali-earth elements in such glass compensate charge in the alumo-oxygen tetrahedrons AlO 4 -1 , and is not formed connection with the non-bridge atoms of oxygen. In other words, the structure of such glass must be completely polymerized. However, there is a number of the experimental works, which testify about the presence in such glass of the non-bridge atoms of oxygen [Riebling, 1966; Stebbins, Xu, 1997].In a number of works it was also shown that the properties of aluminosilicate glasses and melts depend on what cations, one-or double-charged, enter into their structure. Works [Webb, Courtial, 1996;Kress, et al., 1988] show that the bulk moduli of melts in the CaO-Al 2 O 3 -SiO 2 system are, in general, higher than those in the Na 2 O-Al 2 O 3 -SiO 2 system. Kuryaeva 5 Kuryaeva, 2004 reported that the compressibility of tholeiite basalt glass is lower than that of the glass with alkaline basalt composition. The former, in addition to net formers, contains mainly cations of alkaline-earth elements. The composition of the latter is similar to that of tholeiite basalt glass but contains mainly cations of alkaline metals. However, natural glass of alkaline and tholeiitic basalt, besides the oxides of silicon, aluminum and alkaline (alkaline-earth) cations, contain other components, which also could influence the compressibility of glasses.In this work, for the purpose of the confirmation of the assumption about different compressibility of aluminosilicate glass and melts, which contain the cations of alkaline or alkali-earth elements expressed previously, the compressibilities of two identical aluminosilicate glasses Na 2 O•Al 2 O 3 •6SiO 2 and CaO•Al 2 O 3 •6SiO 2 are compared. The obtained results are discussed from the point of view of the different degree of polymerization of their structural network.Experimental technique and results. Glasses of Na 2 O•Al 2 O 3 •6SiO 2 and CaO•Al 2 O 3 •6SiO 2 compositions were synthesized and studied in the works [Kuryaeva, 2009;Kuryaeva, Surkov, 2010].The refractive index at high hydrostatic pressures was measured by the technique described in detail in our...

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Effect of the replacement of aluminum by magnesium on the compressibility and degree of polymerization of silicate glasses

Kuryaeva

Surkov

2013

J Mater Sci

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Effect of pressure on the refractive index and relative density of the CaO·Al2O3·6SiO2 glass

Cited by 13 publications

References 46 publications

Effect of packing pressure on refractive index variation in injection molding of precision plastic optical lens

Effect of packing pressure on refractive index variation in injection molding of precision plastic optical lens

Effect of alkaline and alkaline-earth cations on the compressibility of aluminosilicate glasses

Effect of the replacement of aluminum by magnesium on the compressibility and degree of polymerization of silicate glasses

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