extensive use
The fire resistance and physical strength of borosilicate glass make it an ideal choice for laboratories. This is a kind of laboratory equipment, which is used to make high-durability glass, such as beakers and test tubes.
In the mid-20th century, borosilicate glass tube coolant (usually distilled water) was used to pass through electronic equipment based on high-power vacuum tubes, such as commercial broadcast transmitters.
Glass cookware is another common usage. Borosilicate glass pie plates are almost American standard plates. Borosilicate glass measuring cups, marked with pictures indicating scales, are also widely used in American kitchens.
Aquarium heaters are sometimes made of borosilicate glass. Because of its high heat resistance, it can tolerate the huge temperature difference between water and nickel-chromium alloy heating elements.
Many high-quality flashlights use borosilicate glass as the lens. This makes the light transmittance through the lens higher than that of plastic and low-quality glass.
Professional lighters and pipes are made of borosilicate glass. High heat resistance enables the pipes to be used for a long time, and these pipes are more durable.
Most prefabricated glass guitar slides also make borosilicate glass.
The new wire drawing technology makes the application of contemporary art such as glass balls.
Borosilicate glass is sometimes used for high-quality beverage glassware. Borosilicate glass contributes to the compatibility of kitchen utensils and glassware with microwave ovens and dishwashers to increase durability.
Borosilicate is also a kind of material to choose solar heat utilization technology for vacuum tubes because of its high strength and heat resistance.
In the semiconductor industry, borosilicate glass has also been found as a part of the etched wafer stack of bonded etched borosilicate glass.
Insulating brick on the space shuttle is coated with borosilicate glass. Lighting equipment manufacturers use its refractive borosilicate glass.
Its main performance index has reached the international ISO standard, which is the same as the 7740 material of Corning Company in the United States and the 50 material of Short Company in Germany. Compared with ordinary glass, it has no toxic and side effects, and its mechanical properties, thermal stability, water resistance, alkali resistance and acid resistance are greatly improved. Can be widely used in chemical industry, aerospace, military, family, hospitals and other fields. , can be made into lamps, tableware, target plates, binoculars, observation holes of washing machines, microwave ovens, solar water heaters and other products, with good promotion value and social benefits.
Solar water heater, the main material of vacuum collector tube, mainly uses its good light transmittance, good mechanical properties and good impact resistance. Some manufacturers use low-iron glass. , lacking the above properties, is different from high boron silicon in weight and appearance. (The colors are dark and light. Generally used by small manufacturers)
characteristic
The thermal expansion coefficient of borosilicate glass is very low, which is about one third of that of ordinary glass. This will reduce the influence of temperature gradient stress, thus having stronger fracture resistance. Because its shape deviation is very small, it becomes an essential material for telescopes and mirrors. It can also be used to treat high-level nuclear waste.
Borosilicate glass begins to soften at about 821℃ (1510 ℉). At this temperature, the weight of 7740 high viscosity borosilicate is 107.6.
Borosilicate glass is denser than ordinary glass.
Although borosilicate glass is more resistant to thermal shock than other types of glass, borosilicate glass will still break due to rapid or uneven temperature changes. When broken, the cracks in borosilicate glass tend to be larger, rather than crushed (it will unit, rather than split).
Optically, borosilicate glass has low dispersion (crown glass with Abbe number of about 65) and relatively low refractive index (the whole visible range is 1.5 1- 1.54).
G3.3 high borosilicate glass has a linear expansion coefficient of 3.3 × 1× 10-6/k, and is a glass with sodium oxide (Na2O), boron oxide (B2O3) and silicon dioxide (SIO2) as its basic components. The contents of boron and silicon in this glass are relatively high, that is, boron: 12.5~ 13.5% and silicon: 78~80%, so this glass is called high borosilicate glass. It belongs to PYREX glass in borosilicate glass [1]. Acid resistance, alkali resistance, water resistance, excellent corrosion resistance, good thermal stability, chemical stability and electrical properties, so it has the characteristics of chemical corrosion resistance, thermal shock resistance, good mechanical properties and high temperature resistance.