The future is shaped by us.

The QSIL Group has been the leading specialist for high-temperature refractory, high-purity and high-tech materials for 60 years.

Business Units

Your specialist for high-tech materials quartz, ceramics and metal.

Quartz / Special glass

Quartz and special glass are ideal for use in the most technologically demanding areas. The combination of unique thermal, mechanical and optical properties makes them indispensable materials for industry and science.


Ceramics offer versatile applications with materials that contribute significantly to your required solution through fine-tuning of properties, application specific finishing and bonding and bonding with other materials.

Refractory metals

A fully integrated supplier offering materials from powder, sheet or rod to fully finished machined, fabricated and 3D printed parts using additive manufacturing. QSIL offers a diverse portfolio of products of the highest quality including an in-house engineering design and modelling service.

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at nine locations

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Experience in manufacturing
of high-tech materials

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Million euro



Our products are the basis for innovative applications.

We develop solutions for your challenges. Because standard products are often not enough, we work hand in hand with you at the early project stage to realize your product vision.


Highest purity and reliability for your requirements.

Medical Technology

From nano to macro.

Industrial Solutions

Innovative solutions for a wide range of industrial applications.


Solutions for the use of light as a tool.

Aerospace technology

Opening new paths and protecting lives.


High-purity components from a single source.


Production technologies for high-tech materials.

QSIL has the latest technologies for manufacturing products from quartz and special glass, ceramics and metals. This know-how enables us to manufacture high precision components from individual pieces to series production, entirely according to the needs of our customers.

Manufacturing process for quartz and special glass

Ceramic shaping technologies

Technologies for the production of products from refractory metals

Assistive Technologies

Plasma Melting Process

Ilmasil® quartz glass is manufactured using our self-developed plasma melting process: In a rotating melting vessel, high-purity quartz sand, which is located on the inner vessel wall as a result of centrifugal force, is melted to form hollow cylinders (billets). An electric arc of high power acts as the energy source. This plasma arc guarantees a constant temperature field over the entire melting chamber and thus causes uniform melting of the crystalline raw material into amorphous quartz glass.


Become part of our success story.

Come join our team.

Qualified specialists for the production and processing of our high-performance materials are among our most valuable assets. They help to secure and further expand our technological lead. As a locally rooted, internationally operating group of companies, QSIL offers employees a wide range of benefits at their respective locations.


Latest news from QSIL.

Formnext 2023

QSIL at the Formnext 2023 in Frankfurt am Main

The QSIL Group will be exhibiting at the world's leading trade fair for additive manufacturing technologies in Frankfurt am Main from November 7 to 11. We look forward to seeing you at our stand in Hall 11.1 (F31) and are eager to answer all your questions!

QSIL is on board: 10 years of INDUSTRIE INTOUCH in the south of Thuringia

"Industry at your fingertips" is the motto at QSIL Ingenieurkeramik GmbH in Frankenblick on Wednesday, October 18, 2023, to mark the anniversary of the industry event. Register now for free and take a look behind the scenes!
Grundsteinlegung des Erweiterungsbaus in der Metallisierung in Auma-Weidatal

QSIL invests four million euros in extension building at Auma site

Ceramics specialist from eastern Thuringia expands metallization production capacity to optimally meet steadily growing customer requirements in the future.


Local partner, represented worldwide.

Production sites


Ilmenau – Headquarters & Quartz Glass Production

Hattert – ROBU – Glass filter elements

Auma – Oxide ceramics

Frankenblick – Non-oxide ceramics

Sonneberg – Non-oxide ceramics

Jena – Additive manufacturing

Hermsdorf – Refractory Metals


Winschoten – Quartz and special glass

Great Britain

Calne – Refractory Metals

Sales offices





South Korea