I. Definition and characteristics of high boron silicon glass tube/rod
High boron silicon glass tube/rod is a glass material with special properties, which is mainly composed of silicon dioxide, boron oxide and a small amount of other oxides.
Its features include:
1. Excellent heat resistance: it can withstand high temperature, can withstand a temperature of up to 500℃ in a short time, and the temperature can reach about 300℃ for a long time.
2. Low expansion coefficient: The thermal expansion coefficient is small, about one-third of that of ordinary glass, which makes it difficult to break when the temperature changes.
3. Good chemical stability: It has strong resistance to acid, alkali and other chemicals and is not easy to be corroded.
4. High transparency: good optical performance, high light transmittance, clear and transparent.
II. Production process of high boron silicon glass tube/rod
1. Preparation of raw materials
High-quality silicon dioxide, boron oxide and other raw materials are selected and mixed according to a certain proportion.
2. Fuse
Put the mixed raw materials into a high-temperature furnace and melt them at a temperature above 1500℃ to form a uniform glass liquid.
3. Take a desired shape
(1) Glass tube molding: the glass liquid is pulled into a tube through a tube pulling machine, which can be made by vertical or horizontal drawing.
(2) Glass rod molding: The glass liquid is usually made into a rod by die-casting or pulling method.
4. Anneal
The molded glass tube/rod is annealed to eliminate internal stress and improve its mechanical strength and stability.
III. Application fields of high boron silicon glass tube/rod
1. Lamp manufacturing
It is often used to manufacture high-temperature-resistant light bulbs, lamps, etc., such as halogen lamps, solar lamps, etc.
2. Chemical industry
It is used to make chemical reaction containers, pipes, etc. because of its superior chemical corrosion resistance.
3. Instrumentation
Manufacture glass components for thermometers, pressure gauges and other instruments.
4. Solar energy industry
It is widely used in the collectors of solar water heaters.
5. Household goods
Such as heat-resistant water cups, teapots, etc.
IV. The current market situation and development trend of high boron silicon glass tubes/rods
1. Current market situation
At present, the market demand for high-boron silicon glass tubes/rods continues to grow, especially in the fields of new energy, electronics and chemical industry. At the same time, the market competition is becoming increasingly fierce, and production enterprises continue to improve product quality and performance to meet the diversified needs of customers.
2. Development trend
(1) Technological innovation: continuously improve the production process, improve the quality and performance of products, and reduce production costs.
(2) Application expansion: With the development of emerging industries, the application field of high borosilicate glass tubes/rods will be further expanded, such as the application in semiconductors, aerospace and other fields.
(3) Green environmental protection: pay attention to the environmental protection and sustainable development of the production process, and develop more environmentally friendly production technologies and products.
V. Quality standards and testing methods of high borosilicate glass tubes/rods
1. Quality standards
It mainly includes indicators of appearance quality (such as surface flatness, bubbles, impurities, etc.), dimensional accuracy, physical properties (such as heat resistance, chemical stability, mechanical strength, etc.).
2. Detection method
(1) Appearance detection: check surface defects through naked eye observation or with the help of microscope and other tools.
(2) Size measurement: Use calipers, micrometers and other tools to measure dimensional accuracy.
(3) Heat resistance test: use high-temperature test chamber and other equipment for heat resistance test.
(4) Chemical stability test: soak the sample in acid and alkali solution to observe its corrosion.