What are the properties of Borosilicate Glass? Borosilicate glass is a form of glass that contains silica and boron trioxide as its major ingredients. Borosilicate glasses have much lower thermal expansion coefficients than most common glasses (3 106 K1 at 20 °C), making them very resistant to thermal shocks. Such glass is less thermally stressed and can sustain temperature differences of up to 165°C (297°F) without cracking. Reagent bottles and flasks, as well as lights, electronics, and cooking, are all made from it.
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Physical Characteristics: The most common variety of borosilicate glass used in laboratory glassware has a thermal expansion value of about one-third that of conventional soda-lime glass (3.3 106 K1). As a result, borosilicate is a preferable choice for some applications because it decreases material strains produced by temperature gradients. Fused quartz ware is even better in this aspect, with one-fifth the thermal expansion of soda-lime glass; however, quartz ware is much more expensive due to the difficulty of dealing with fused quartz, and borosilicate glass is a low-cost compromise. Even while borosilicate glass is