Yantai ZK Optics Co., Ltd.
Custom fabrication of high precision glass parts. Spirit of enterprise: Integrity, Pragmatism, Innovation, Win-win, Appreciation. Tenet of enterprise: the Supremacy of Customer, the Excellence in
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High Borosilicate Glass Tube For Laboratory Glassware Lab Glassware
Borosilicate glass is a type of glass with silica and boron trioxide as the main glass-forming constituents. 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 (297 °F). It is commonly used for the construction of reagent bottles and flasks as well as lighting, electronics and cookware.
| Borosilicate glass | |
| Silicon Content | >80% |
| Coefficient of Thermal Expansion (20-300℃) | 3.3×10-6 /K |
| Density(20℃) | 2.23g/cm3 |
| Hot Work Temperature(104dpas) | 1220℃ |
| Annealing temperature | 560℃ |
| Softening temperature | 820℃ |
| Refractive Index | 1.47 |
| Thermal Conductivity | 1.2Wm-1 K -1 |
Rich experience in quartz glass industry
We have more than 25 years industry experience in quartz glass processing. We specialize in quartz glass capillary tubes and rods, quartz glass substrates, CNC machined quartz, and quartz instruments etc. According to product application, we have good grasp of material properties and adapt the proper material into product application.
Strong technical force in processing and application
Beijing Zhong Cheng Quartz Glass Co., Ltd(ZCQ) is a high-tech manufacturer specializing in the production and customization of quartz glass products and optical glass products. We has excellent technical strength, strong innovation ability and stable product quality. Our processing method is rich, drawing of glass, cold and thermal processing, micro size machining, high precision and difficulty process, combination of multiple processing methods, which guarantee that our product is excellent in all aspects.
Integrity and Quality Assurance
We are well known in quartz glass industry. Quality is the lifeline of enterprise survival and development. Integrity is the source of enterprise reputation, the foundation of standing and the foundation of development. Through unremitting efforts and continuous improvement, we have created a good manufacturing platform of optical glass for customers.