Nucleation and crystal growth in water containing soda–lime–silica glasses

Potapov, O. V.; Fokin, Vladimir M.; Filipovich, V. N.

doi:10.1016/s0022-3093(99)00037-x

Cited by 19 publications

(16 citation statements)

References 7 publications

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“…When the glass network is broken down by the water molecules, the glass transition temperature (T g ) is drastically reduced to a point within the temperature range of the hydrothermal treatment in the present experiment [7,8]. It is known that the nucleation rate is increased to a point just above T g in many silicate glasses [9,10]. Moreover, as opposed to the Na 2 O-SiO 2 system, various stable crystals known as layered calcium silicate are easily formed in the Na 2 O-CaO-SiO 2 system [11,12].…”

Section: Discussionmentioning

confidence: 55%

A novel process utilizing subcritical water to recycle soda–lime–silicate glass

Mizumoto¹,

Chen²,

Akai

2004

Journal of Non-Crystalline Solids

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Section: Discussionmentioning

confidence: 55%

A novel process utilizing subcritical water to recycle soda–lime–silicate glass

Mizumoto¹,

Chen²,

Akai

2004

Journal of Non-Crystalline Solids

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“…Experimental nucleation rate data, induction times, viscosity and DG V for Li 2 O á 2SiO 2 and Na 2 O á 2CaO á 3SiO 2 glasses from [7,8,26,27] were used. These glasses exhibit internal, presumably homogeneous nucleation.…”

Section: Calculations and Resultsmentioning

confidence: 99%

“…Surface energy, calculated in such a way, slightly increases with temperature dradT $ 0X06±0X16 Â 10 À3 J m À2 K À1 . For instance, dradT 0X059 Â 10 À3 for Ga [4], 0X09 Â 10 À3 for Hg [5], 0X16 Â 10 À3 [6], 0X13 Â 10 À3 for L2S [7], 0X114 Â 10 À3 [3], 0X128 Â 10 À3 for N2C3S [8], 0X129 Â 10 À3 J m À2 K À1 [this work] for 2NC3S; where L2S, N2C3S and 2NC3S denote glasses of stoichiometric composition Li 2 O á 2SiO 2 , Na 2 O á 2CaO á 3SiO 2 and 2Na 2 O á CaO á 3SiO 2 .…”

Section: Introductionmentioning

confidence: 99%

Crystal nucleation in silicate glasses: the temperature and size dependence of crystal/liquid surface energy

Fokin

Zanotto

2000

Journal of Non-Crystalline Solids

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The most basic assumption of the classical nucleation theory (CNT) is to treat nucleus/liquid surface energy, r, as a macroscopic property having a value equal to that of a planar interface, r I . Therefore, when the CNT is used to analyze experimental data, the size dependence of surface energy is often neglected. To date, there has been no reliable method to measure the surface energy of the nucleus/liquid interface except by ®tting nucleation rate data to the theory. In this case, one obtains the surface energy of critical size nuclei as a function of temperature. However, the ®tted r(T) dependence arises from two di erent factors: the temperature dependence of r for a planar interface and its size dependence. This paper focuses on the temperature dependence of the macroscopic value of surface energy, decoupling it from the size dependent part. TolmanÕs equation was used to eliminate the size dependence of surface energy from published nucleation data for two stoichiometric silicate glasses (Li 2 O á 2SiO 2 and Na 2 O á 2CaO á 3SiO 2 ). It is shown that the Tolman parameter may be chosen so that surface tension decreases with temperature; dr I adT`0. The value of dr I adT obtained in this way is close to theoretical predictions. Ó

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“…When the thermodynamic barrier is diminished, at fixed values of C 2 , by decreasing the parameter C 1 (which is proportional to a ST and the reduced melting enthalpy DH r m ¼ DH m =RT m Þ, the value of I max also increases (curves 1 and 6-8), but the value of T max shifts to higher temperatures. The effect of variation of the kinetic barrier on the nucleation rate can be qualitatively illustrated for lithium disilicate [51] and sodium metasilicate [52] glasses with different H 2 O content (a few percent of water often result in a significant decrease of viscosity) as shown in Fig. 13.…”

Section: Temperature Dependence Of Steady-state Nucleation Ratesmentioning

confidence: 99%