In the vast world of industrial and scientific materials, few stand out as prominently as borosilicate 3.3. This special type of glass has revolutionized various industries thanks to its unique characteristics and unparalleled versatility. At Zight, we understand the importance of choosing the right materials for every application, which is why we’ve created this comprehensive guide on borosilicate 3.3.

In this article, we’ll break down everything you need to know about this exceptional material: from its definition and origin to its diverse uses and how it compares to other types of glass. Whether you’re a professional seeking precise technical information or simply curious to learn more, we invite you to dive with us into the fascinating world of borosilicate 3.3.


Origin of Borosilicate

Borosilicate glass was developed in the late 19th century. The German chemist Otto Schott is widely recognized for his crucial role in the creation of this material. Schott founded the company Schott AG in 1884 and began experimenting with different glass compositions, seeking to improve the thermal and chemical properties of the material.

The inclusion of boron oxide (B₂O₃) in the glass mixture was a significant breakthrough. Boron oxide allowed Schott to develop a glass that was not only more resistant to temperature changes but also offered greater chemical resistance compared to traditional soda-lime glasses. This new type of glass was called borosilicate. Borosilicate is a high-quality glass primarily composed of silica (SiO₂) and boron oxide (B₂O₃), along with small amounts of alkali and alkaline earth oxides. This combination gives borosilicate its distinctive properties:


  • Thermal Resistance:

    Borosilicate glass boasts superior thermal resistance compared to common glass types such as soda-lime glass. Its low thermal expansion coefficient ensures it withstands thermal shock more effectively, making it preferable for applications requiring resilience to rapid temperature changes.

  • Chemical Resistance:

    In contrast to standard glass varieties like soda-lime glass, borosilicate glass exhibits significantly higher chemical resistance. While soda-lime glass may corrode when exposed to acids or alkalis, borosilicate glass remains robust and durable in such environments, making it the preferred choice for applications in harsh chemical settings.

  • Transparency:

    When compared to plastics and some other glass types, borosilicate glass maintains exceptional optical transparency. Unlike plastics that may yellow or fog over time, and ordinary glass which may have impurities affecting clarity, borosilicate glass ensures clear and undistorted visibility, making it indispensable for applications requiring optical precision.


Borosilicate 3.3: A Quality Standard

The term “Borosilicate 3.3” refers to a specific formula of borosilicate glass containing approximately 80% silica and 13% boron oxide, with a linear thermal expansion coefficient of 3.3 x 10-6 K-1. This particular composition was developed to maximize the desirable properties of borosilicate, providing greater thermal stability and chemical resistance. Borosilicate 3.3 became the quality standard for many industrial and scientific uses.

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Uses of Borosilicate 3.3 in Various Industries

Borosilicate 3.3 is extremely versatile and used in a wide range of industries due to its exceptional properties:
Chemical and Laboratory Industry: The resistance of borosilicate 3.3 to aggressive chemicals makes it ideal for laboratory equipment such as test tubes, flasks, and pipettes. It is also used in chemical reactors that must withstand high temperatures and corrosive substances without damage.


  • Pharmaceutical Industry:

    The purity and resistance to contamination of borosilicate 3.3 make it the preferred choice for drug packaging, such as vials and ampoules, which need to be regularly sterilized without degrading or releasing contaminants.

  • Lighting Industry:

    The ability of borosilicate 3.3 to withstand high temperatures and thermal shocks is crucial in the manufacture of lamps and bulbs, which often operate at high temperatures. Its durability ensures a longer lifespan for these products.

  • Aerospace and Defense Industry:

    In applications where transparent and resistant materials are required, such as aircraft and spacecraft windows, borosilicate 3.3 offers an excellent combination of optical clarity and mechanical strength, enduring extreme temperature and pressure conditions.

  • Food Industry:

    Kitchen utensils made of borosilicate 3.3 are valued for their ability to withstand heat and chemicals. This includes containers that can go directly from the freezer to the oven without risk of fracturing.

  • Energy Industry:

    In the production of solar cells and nuclear energy components, the stability and durability of borosilicate 3.3 under extreme conditions make it indispensable. Its resistance to radiation and thermal changes ensures reliable and long-lasting performance.


Specific Applications

Borosilicate 3.3 glass is an exceptionally versatile material that finds applications across various fields due to its unique properties of thermal, chemical, and mechanical resistance. Let’s delve into some of the standout applications of this innovative material:


  • High-Quality Glassware:

    Borosilicate 3.3 glass is the preferred choice for crafting glasses, plates, and containers that must endure extreme temperature conditions and resist use in microwaves and dishwashers. Its heat resistance makes it a safe and durable option for everyday use in both household and food industry settings.

  • Optics:

    The excellent optical clarity and dimensional stability of borosilicate glass make it ideal for manufacturing lenses and prisms used in precision equipment such as microscopes, telescopes, and cameras. Its low thermal expansion ensures high image quality and greater durability in demanding optical applications.

  • Medical Technology:

    In the field of medical technology, borosilicate 3.3 glass plays a crucial role in the production of diagnostic and treatment equipment that requires materials of high purity and strength. From test tubes and flasks to components for chemical analysis devices and magnetic resonance imaging equipment, borosilicate glass offers a unique combination of properties that ensure precision and reliability in critical medical applications.

These are just a few of the many ways in which borosilicate 3.3 glass drives innovation and enhances everyday life across a variety of industries. Its exceptional strength, clarity, and durability make it an irreplaceable choice for a wide range of demanding applications.


Comparison with Traditional Borosilicate

Characteristic Borosilicate 3.3 Traditional Borosilicate
Thermal Expansion Coefficient 3.3 x 10⁻⁶ /°C Higher than 3.3 x 10⁻⁶ /°C
Chemical Composition Higher percentage of boron oxide More sodium and calcium
Resistance to Thermal Shocks High Lower
Chemical Resistance High Lower
Applications Critical and industrial applications Less demanding applications, lower cost


Borosilicate 3.3 is a versatile and highly resistant material that has found applications in a wide range of industries due to its exceptional thermal and chemical properties. From scientific laboratories to the aerospace industry, its use is synonymous with quality and durability. Compared to traditional borosilicate, borosilicate 3.3 offers significant advantages in terms of resistance to thermal shocks and chemicals, making it indispensable in critical applications.