Bulk Pack of Flat Bottom Flask

Borosilicate Glassware

Borosilicate glasses are known for having very low coefficients of thermal expansion (≈3 × 10−6 K−1 at 20 °C), making them more resistant to thermal shock than any other common glass. Such glass is subjected to less thermal stress and can withstand temperature differentials without fracturing of about 165 °C (300 °F). 

硼矽玻璃的熱膨脹系數非常低（20 °C時≈3×10-6 K-1），因此比其他普通玻璃更能抵抗熱沖擊。這種玻璃受到的熱應力較小，可以承受約 165 °C（300 °F）的溫差而不破裂。