Sodium tracer diffusion in glasses of the type (Na2O)0.2(B2O3) (SiO2)0.8−
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Abstract
Abstract Sodium tracer diffusion coefficients, D⁎Na, have been measured in sodium borosilicate glasses of the type (Na2O)0.2(B2O3)y(SiO2)0.8−y as a function of temperature and the composition parameter y. At constant temperature, the tracer diffusion coefficient of sodium decreases as y increases. The activation enthalpy derived from sodium tracer diffusion data for temperatures up to about 350 °C increases about linearly with increasing values of y from about 70 to 100 kJ/mol. The pre-exponential factor of the sodium tracer diffusion coefficient as a function of y varies by about one order of magnitude and has a minimum at near y = 0.3.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Glass properties and applications · Luminescence Properties of Advanced Materials · Nuclear materials and radiation effects
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