Crystallization Kinetics of Modified Basalt Glass.

Area of Science:

• Materials Science
• Glass Science
• Ceramics

Background:

• Basalt continuous fibers are vital industrial materials.
• The production of basalt fibers relies on basalt glass (BG) as a raw material.
• Controlling the crystallization behavior of BG is essential for stable fiber production.

Purpose of the Study:

• To investigate the crystallization kinetics of basalt glass (BG) and chemically modified basalt glass (MBG).
• To assess the impact of chemical modification on the crystallization tendency and thermal stability of BG.
• To explore methods for improving the industrial-scale production of basalt fibers.

Main Methods:

• Melt quenching method was used to prepare BG and MBG.
• Differential scanning calorimetry (DSC) with Kissinger methods analyzed crystallization kinetics.
• Scanning electron microscopy (SEM/EDX) and X-ray diffraction (XRD) examined crystalline phases and structures.

Main Results:

• Both BG and MBG exhibit difficult crystallization at high temperatures.
• Modified basalt glass (MBG) shows significantly higher crystallization activation energy than BG.
• Chemical modification effectively suppressed the crystallization ability of MBG, with minimal crystalline phase formation observed.

Conclusions:

• Chemical modification is a viable strategy to suppress the crystallization tendency of basalt glass.
• MBG demonstrates improved thermal stability compared to BG.
• This approach facilitates the industrial-scale and stable production of high-quality basalt fibers.