1：Experimental Design and Method Selection

The study focused on the effect of boron substitution for aluminium on the structure of fluoro-aluminosilicate glasses and glass ceramics. A series of substituted glasses were prepared and characterized.

2：Sample Selection and Data Sources

Powders of silicon dioxide (SiO2), aluminium oxide (Al2O3), phosphorus pentoxide (P2O5), calcium fluoride (CaF2), boron oxide (B2O3), and calcium carbonate (CaCO3) were mixed and melted to produce glasses with varying boron substitutions.

3：List of Experimental Equipment and Materials

Electric furnace (EHF 17/3, Lenton, UK), platinum rhodium (Pt, 5% Rh) crucible, gyro mill, differential scanning calorimetry (Netzsch 404C DSC), thermogravimetric analysis (Netzsch 404C STA), helium pycnometer (AccuPyc II 1340 Series), Fourier Transform Infrared Spectroscopy (FTIR, Spectrum2000, PerkinElmer, USA), X-ray diffraction (Philips analytical X-Pert XRD, MAC Science Co. Ltd M21X XRD), solid-state NMR spectrometer (Bruker ADVANCE 400 III), scanning electron microscope (XL 30 ESEM&EDX FEG).

4：Experimental Procedures and Operational Workflow

Glasses were prepared by melting mixed powders at 1450 oC for 1.5 h, followed by water quenching. Glass-ceramics were produced by heat treatment of glass powders. Characterization included thermal analysis, density measurements, FTIR, XRD, NMR, and SEM.

5：Data Analysis Methods

Thermal transitions were analyzed using DSC and TGA. Density was measured using helium pycnometry. Structural characterization was performed using FTIR, XRD, and NMR. Morphology and composition were analyzed using SEM and EDS.