1：Experimental Design and Method Selection:

The study used a traditional solid-state reaction technique to synthesize (1?x)BaTiO3-xBi(Sr2/3Nb1/3)O3 ceramics with x ranging from 0.02 to 0.1. The rationale was to optimize dielectric properties for high-temperature applications. Methods included X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), and impedance spectroscopy to analyze phase evolution, microstructure, and dielectric behavior.

2：02 to The rationale was to optimize dielectric properties for high-temperature applications. Methods included X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), and impedance spectroscopy to analyze phase evolution, microstructure, and dielectric behavior. Sample Selection and Data Sources:

2. Sample Selection and Data Sources: Ceramic samples were prepared with varying compositions (0.02 ≤ x ≤ 0.1) and sintered at temperatures from 1280°C to 1380°C. Data were collected from these synthesized samples.

3：02 ≤ x ≤ 1) and sintered at temperatures from 1280°C to 1380°C. Data were collected from these synthesized samples. List of Experimental Equipment and Materials:

3. List of Experimental Equipment and Materials: Equipment included an X-ray diffractometer (Model X’Pert PRO; PANalytical), Raman spectrometer (Thermo Fisher Scientific DXR), scanning electron microscope (Model JSM6380-LV SEM; JEOL), and precision impedance analyzer (Model E4980AL; Hewlett-Packard Co). Materials included raw powders for BaTiO3 and Bi(Sr2/3Nb1/3)O3, silver paste for electrodes.

4：Experimental Procedures and Operational Workflow:

Samples were sintered in air for 2 hours. XRD and Raman measurements were done at room temperature. SEM was used to observe microstructure. Dielectric properties were measured from -120°C to 200°C at frequencies of 100 Hz to 1 MHz, and impedance was measured from 640°C to 740°C. Silver electrodes were applied and heated to 700°C.

5：Data Analysis Methods:

XRD patterns were analyzed using PanAlytical software (X’PertHighscore Plus). Impedance data were fitted to Arrhenius equations to calculate activation energies for relaxation and conduction processes.