It is established by means of x-ray diffraction and electron microscopy that in La2O3 – B2O3 – GeO2 glasses a lanthanum germanate La2Ge2O7 film texture up to 5 μm thick, under which forms needle-like texture of stillwellite-like LaBGeO5 possessing pyroelectric properties is formed in the surface layer on contact between the glass and a corundum substrate or under a load during heat-treatment in a wide temperature range. The temperature dependences of the dielectric and pyroelectric properties of the samples with La2Ge2O7 – LaBGeO5 – La2Ge2O7 sandwich structure and ground samples containing only a stillwellite-like phase are studied.
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Translated from Steklo i Keramika, No. 8, pp. 9 – 13, August, 2009.
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Sigaev, V.N., Orlova, E.V., Stefanovich, S.Y. et al. Sandwich texture and its effect on the electrophysical properties of lanthanum borogermanate based glass ceramics. Glass Ceram 66, 275 (2009). https://doi.org/10.1007/s10717-009-9182-y
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DOI: https://doi.org/10.1007/s10717-009-9182-y