1：Experimental Design and Method Selection:

The study used melt quenching technique for glass synthesis, followed by controlled crystallization through heat-treatment. Crystallization kinetics were analyzed using linear (Kissinger, Augis-Bennett, Ozawa, Matusita) and nonlinear (Avrami-Erofeev) solid state reaction models, and model-free Friedman method.

2：Sample Selection and Data Sources:

A glass with composition 30BaO-15TiO2-55GeO2 doped with

3：5 mol% Eu2O3 was prepared from high purity raw materials. Samples were heat-treated at 750°C for varying durations (3, 6, 9, 12, 15 h). List of Experimental Equipment and Materials:

Raw materials included GeO2 (Sigma-Aldrich), BaCO3 (Fluka Chemica), TiO2 (Merck India Ltd.), Eu2O3 (Sigma Aldrich). Equipment included DSC (NETZSCH STA 449 F3), dilatometer (NETZSCH DIL 402 PC), XRD (PANalytical XPERT-PRO MPD), FESEM (Carl Zeiss Gemini Suprat 35 VP), TEM (FEI TecnaiG2 30ST), FTIR spectrometer (Perkin-Elmer Frontier), UV-Vis-NIR spectrophotometer (Perkin-Elmer Lambda 950), spectrofluorometer (Photon Technology International Quanta Master), prism coupler (Metricon 2010/M), LCR meter (Hioki 3532-50 Hitester), and ceramic multilayer actuator test bench (aixCMA).

4：Experimental Procedures and Operational Workflow:

Glass was melted at 1300°C for 2 h, poured, annealed at 630°C, cut and polished. Heat-treatment was done at 750°C with heating/cooling rates of 1°C/min. Various characterizations (DSC, XRD, FESEM, TEM, FTIR, optical, dielectric, hysteresis) were performed.

5：Data Analysis Methods:

Kinetic parameters were analyzed using NetzschThermokinetics software. Crystallite size was calculated using Scherrer's formula. Optical band gap was determined using Tauc's plot. Dielectric and hysteresis properties were measured and analyzed.