Glass fiber is widely used. With the implementation of the “Made in China 2025” national strategy, major technologies and engineering fields such as new energy development, vehicle weight reduction, and long-distance oil and gas transmission are all required to be supported by higher performance reinforced fibers as basic materials.
As is known to all, in the glass fiber industry, the strength and modulus of traditional glass fiber are low, and the performance cannot meet the requirements. In the existing high-performance glass fiber, the high modulus medium glass fiber has low strength and is currently not industrialized. High-strength small glass fiber is difficult to produce and it is difficult to scale production. Therefore, there is an urgent need to develop high-modulus, high-strength, high-performance glass fibers, and mass production. This is crucial for promoting technological progress in the glass fiber and composites industry. High-performance fiberglass formulations are the core technology of the project. The project team developed and researched the "three-element mixed alkali-earth effect technology". For the first time, the three-element mixed alkaline earth effect of calcium, magnesium, and strontium was applied in the field of glass fiber, and it was also the first time that tritium was introduced into the ternary system. Through a large number of experiments, the proportions of calcium oxide, magnesium oxide, and cerium oxide were determined, and the ions of different sizes were most closely packed, thereby improving the mechanical properties of the glass fiber, and the strength of the glass fiber reached 2600-2800 MPa, and the modulus reached 88-91 GPa. The introduced Li2O reduces melt viscosity, develops high COD reducing sulfur fining technology, lowers liquidus, increases heat absorption, and reduces melting difficulty.
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