Abstract
The paper investigates the structure and crystallization specifics of glass behaving as a precursor of a pyroelectric material with a unique combination of properties of the composition 25La2O3 · 25B2O3 · 50GeO2 depending on the quantity of Al2O3 additive. It is established that as the alumina content grows, the crystallization of glass essentially changes: the propensity of glass to oriented surface crystallization of ferroelectric LaBGeO5 is suppressed and the share of lanthanum borate and germanate grows. The type of crystallization of glass correlates with IR spectroscopy data, indicating that modifications of the glass structure caused by increasing Al2O3 content lead to substantial changes in the BO3: BO4 ratio.
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