Non-isothermal crystallization of La2O3·B2O3·2GeO2 glasses

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

“…As it is known, stillwellite crystals grow from surface nuclei in LBG glasses [2]. A crystal growth starting from glass surface is an important pre-requisite for grain-oriented crystallization, while bulk nucleation should be considered as an antagonist of texturing.…”

“…Glasses having 25La 2 O 3 AE 25B 2 O 3 AE 50GeO 2 composition were prepared according to the conventional procedure described elsewhere [1][2][3]. Well mixed batches calculated to yield 50 g of glass were melted both in platinum and corundum crucibles for 30 min at 1300°C.…”

“…Lanthanum boron germanate (LBG) glasses having composition near the stillwellite-like LaBGeO 5 stoichiometry exhibit distinct grain-oriented crystallization tendency [1,2]. Well-formed bulk textures based on needle-shaped crystals of ferroelectric LaBGeO 5 were obtained, with an excellent pyroelectric activity [3][4][5].…”

Non-isothermal crystallization kinetics of ZnO–BaO–B2O3–SiO2 glass

“…Since the three dimensional connectivity becomes weak due to the addition of B 2 O 3 , the nucleation can be completed before the crystal growth occurs at around a glass transition temperature. Effect of B 2 O 3 on the lowering of activation energy of crystallization is well documented in the literature [31,32]. Presence of Al 2 O 3 has a marked effect in decreasing the extent of immiscibility.…”

Thermomagnetic study of the amorphous cobalt-erbium borides Co80ErxB20−x (0⩽x⩽4)

“…Consequently, the crystal growth occurs only on the quenched-in nuclei which increase the devitrification temperature [20].…”