Glass fibers with different diameters and cylindricity were prepared by mechanical wire drawing process, and the upper and lower limits of glass annealing temperature were tested by fiber weight-bearing method, and the effects of fiber geometric parameters, load weight quality and temperature control conditions on the upper and lower limits of annealing temperature test results were investigated. The results show that the upper and lower limits of annealing temperature increase with the increase of glass fiber diameter and decreases as weight mass increases. With the increase of cylindricity, the temperature of the upper and lower limits of annealing decreases. According to the verification results, the suitable conditions for testing the upper and lower limit temperature of glass annealing are that the fiber diameter of 0.6～0.8 mm, the load weight of 800～1 000 g, the heating rate of 5 ℃/min, and the cooling rate of 4 ℃/min, and at the same time, taking into account the safety of the test, the initial temperature is recommended to choose a lower temperature for the experiment.

The sonic wave method is a non-destructive testing method for measuring the modulus of glass materials, but it is limited by the shape and size of samples. Limitations can affect the accuracy of testing the modulus of glass fibers using the sonic wave method due to factors such as the transmission efficiency of the transmitted signal, sensitivity of reception, and differences between samples. This study explored the feasibility of using the acoustic wave method to test the modulus of glass fibers by adjusting the frequency of the acoustic vibration and the number of fibers in the yarn. The results show that with an increase in frequency (5 kHz), the signal intensity through the glass fiber decreases, while vibrations at 200 Hz exhibit good accuracy (coefficient of variation ≤ 3.73%) and goodness of fit (R2=0.999 9). Furthermore, compared with the tensile method, it was found that the test results were consistent, the number of fibers in the yarn increased, the elastic modulus decreased, and the modulus of elasticity of single filaments was higher than that of multifilaments. It provided a reference for future non-destructive testing of fiber material modulus.

Phosphate glass in the P2O5-CaO-B2O3 (PCB) system with different B2O3 contents were prepared by melt-cooling method. The influence of B2O3 content on the structure and thermal stability was investigated. And the glass with the largest weight loss per unit area was selected for preliminary investigation of glass fiber formation process combined with high temperature viscosity and differential scanning calorimetry (DSC) analysis. The results showed that the P-O-P bond was broken down when the mass percentage of B2O3 was 3%. When it reached 12%, B3+ participated in the formation of the P-O-B bond with a greater bond strength, resulting in the highest thermal stability of the glass. At the mass percentage of 18%, [BO3] and [BO4] were present and contributed to the formation of the glass network structure. Finally, this study demonstrated the feasibility of forming phosphate glass fibers in a ternary system with PCB. It was also found that a lower drawing rate could result in defects on the fiber surface. These results provide a basis for future research on functional PCB glass fibers.

Liquidus temperature is an important parameter in glass manufacturing process and is essential for assessing the stability of glass formulations. Based on the gradient furnace method, the influences of thermal insulation time, sample shape and observation position on the accuracy of liquidus temperature measurement of ultra-thin alkali-free glass were explored. The results showed that the liquidus temperature of glass was more accurate when the insulation time was 24 hours, the sample form was rod, and the observation position was inside glass. This study can provide a reference for the determination of glass liquidus temperature, and then provide support for glass formula design and industrial production.

Measuring the temperature of the molten glass in glass furnace is crucial for ensuring high-quality production and energy saving. By accurately measuring the temperature of the glass melt at key locations in the furnace, such as the bottom, throat, working end and forehearth, the process can be optimized and productivity and product quality can be significantly improved. Moreover, different types of thermocouples and their installation techniques in various areas were discussed, as well as how to calculate thermal efficiency, which was important for optimizing kiln operations and improving energy efficiency.

In order to improve the apparent quality of electronic glass and reduce tin defects in glass, a new sealing method at the outlet of tin bath-gas seal was proposed. The effects of gas flow rate, gas pressure, height of gas seal structure from glass plate and pore structure on gas seal effect were studied respectively, and the parameters of the gas seal system were optimized. It was found that in a certain range, the gas seal effect became better with the increase of gas flow rate and gas pressure, and became worse with the increase of height of gas seal structure from glass plate, and the circular pore structure was better than the long pore structure in the outlet pore structure. The optimization of the gas sealing system effectively improves the apparent quality of float electronic glass and significantly reduces the occurrence of glass tin defects.

The state of the liquid flow in the glass furnace and its stability directly affect the product yield, so accurate control of the furnace process, especially the liquid flow control, plays a key role in improving production efficiency and product quality. Practical research shows that the main factors affecting the state of liquid flow in the glass furnace are temperature gradient, electric power distribution, bubbling, weir, etc. A comprehensive analysis of these factors, combined with the actual situation of the furnace to adjust the process parameters, so that the glass liquid flow to achieve the ideal state, for the glass manufacturing industry to provide a valuable reference.

With the acceleration of the urbanization process and the improvement of people's living standards, the amount of glass waste is increasing, causing serious pressure on the environment. By analysing literature review, experimental research and application case, several ways of glass waste resource utilization are proposed, and their feasibility and economic benefits are evaluated. The aim is to explore the innovative technology of recycling glass waste in order to provide new ideas and methods for protecting the environment and saving resources.