STATIONARY AND NONSTATIONARY CRYSTAL NUCLEATION RATE IN A GLASS OF 2NA2O.CAO.3SIO2 STOICHIOMETRIC COMPOSITION
STATIONARY AND NONSTATIONARY CRYSTAL NUCLEATION RATE IN A GLASS OF 2NA2O.CAO.3SIO2 STOICHIOMETRIC COMPOSITION
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DOI：
10.1016/0022-3093(80)90522-0
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发表时间：
1980-01-01
影响因子：
3.5
通讯作者：
FOKIN, VM
中科院分区：
文献类型：
--
作者：
KALININA, AM;FILIPOVICH, VN;FOKIN, VM
研究了2na20 . cao的定态成核速率和非定态成核速率的温度依赖性。同样成分的玻璃中的3sio2晶体。在晶体成核活化能、晶体生长活化能和玻璃粘度之间存在相当大的差异。还研究了在Tpt< T温度下对玻璃进行初步热处理（pt）对T温度下结晶成核的非稳态速率的影响。随着Tpt的降低，这种影响出现最大值。实验数据是根据在Tpt形成的亚临界核的概念来解释的。
Studies have been made of the temperature dependences of stationary and non-stationary nucleation rates of the 2Na2O.CaO.3SiO2crystals in the glass of the same composition. A considerable difference has been established between activation energies of crystal nucleation, crystal growth and glass viscosity. Studies have also been made of the influence of preliminary heat treatment (pt) of the glass at temperatures Tpt< T on the non-stationary rate of crystal nucleation at T. With decreasing Tptthis influence shows up in the appearance of a maximum. The experimental data are interpreted on the basis of notions about subcritical nuclei formed at Tpt.