Surface and bulk stillwellite textures in glasses of the La2O3–B2O3–GeO2 system

Formation of nanostructured state in LaBGeO5 monolithic glass using pulsed magnetic fields

“…4) to microscopic levels (Fig. 5) [17]. In terms of thermodynamics, it means a transition of the solid-phase disperse system to a state with a lower free energy (in this case, the lowest free energy corresponds to the crystalline state) and is in agreement with well-known PMF effects in condensed matter.…”

Influence of alumina addition on crystallization and texturing behavior of LaBGeO5 glass

“…If alumina is dissolved in stillwellite glasses, to produce good quality textured layers becomes more difficult and requires complex heating schedules [16] at lower temperature, to avoid softening, and for a longer time, to allow the diffusion controlled conversion of threefold in fourfold coordinate boron. Anyway a certain degree of dendritic growth was seen [16]. Over a certain amount of alumina the texturing is completely hindered.…”

“…In a previous work [16] grain-oriented crystallization was obtained in glasses of 25La 2 O 3 AE 25B 2 O 3 AE 50GeO 2 composition melted in corundum crucibles. Three different heat treatment schedules were used to obtain needle-shaped crystals of stillwellite-like LaBGeO 5 well oriented along the c axis.…”

Lanthanum borogermanate glass-based active dielectrics

“…Surface grain-oriented crystallization of LBG glasses was examined in works [10][11][12][13][14]. There are numerous factors influencing the crystallization behavior of LBG glasses [12,15] of materials with well-reproducible properties.…”

“…Surface grain-oriented crystallization of LBG glasses was examined in works [10][11][12][13][14]. There are numerous factors influencing the crystallization behavior of LBG glasses [12,15] of materials with well-reproducible properties. The present paper is devoted to clarifying the role of Al 2 O 3 additives, developing data of the work [16], summarizing unique properties of LaBGeO 5 stillwellite and advantages of their realization via glass crystallization, and reviewing probable development of a series of active LBG glass-based dielectrics.…”