DEEN COMPANY MATERIAL TECHNOLOGIES PRODUCTS & SOLUTIONS SERVICE OUR TECHNOLOGIES HOMETECHNOLOGIESPLASMA FUSION PROCESS Plasma Fusion Process ilmasil® - fused quartz is produced using a unique plasma-based fusion process that produces both clear and opaque hollow cylinders (billets) in a single heating step. At the start of the process, high purity quartz sand is fed into a rotating furnace mold, with centrifugal force used to achieve dimensional control. During the fusion process, a high purity gas atmosphere is maintained in the mold while a plasma arc is sparked between the two electrodes. At temperatures greater than 2000°C, the energy of the plasma arc transforms the crystalline quartz sand into fused quartz. Following the fusion process, the cylinders are annealed to remove internal stress. The outer sinter layer is also removed, and a final grinding step achieves precise dimensional requirements. QSIL´s hollow cylinders are the perfect base material for the manufacture of precise symmetric circular products, such as rings and flanges. Our unique fusion process yields high flexibility in both geometries and material properties, thus meeting our customers diverse specifications. Our Products COMPANYMATERIALTECHNOLOGIESPRODUCTS & SOLUTIONSSERVICE IMPRINTPRIVACY POLICYDISCLAIMERSITEMAP QSIL AG / Gewerbering 8 / 98693 Ilmenau / Germany QSIL GmbH Quarzschmelze Ilmenau / Gewerbering 8 / 98693 Ilmenau / Germany QSIL Nederland B.V. / H.M. Brouwerstraat 1 / 9672 AG Winschoten / The Netherlands QSIL Ceramics GmbH / Triptiser Straße 22 / 07955 Auma-Weidatal / Germany QSIL Ingenieurkeramik GmbH / Gewerbepark 11 / 96528 Frankenblick / Germany QSIL is the specialist when it comes to advanced solutions made from high-performance materials, fused silica and engineered ceramics. From the prototype to the serial production of complex special components made of individually optimized materials - QSIL offers an extensive product and material portfolio.

DEEN COMPANY MATERIAL TECHNOLOGIES PRODUCTS & SOLUTIONS SERVICE OUR TECHNOLOGIES HOMETECHNOLOGIESTHERMAL REFLOW PROCESS Reflow By using the thermal reflowing process, QSIL is able to produce round or square solid ingots in both clear and opaque fused quartz. Our Products COMPANYMATERIALTECHNOLOGIESPRODUCTS & SOLUTIONSSERVICE IMPRINTPRIVACY POLICYDISCLAIMERSITEMAP QSIL AG / Gewerbering 8 / 98693 Ilmenau / Germany QSIL GmbH Quarzschmelze Ilmenau / Gewerbering 8 / 98693 Ilmenau / Germany QSIL Nederland B.V. / H.M. Brouwerstraat 1 / 9672 AG Winschoten / The Netherlands QSIL Ceramics GmbH / Triptiser Straße 22 / 07955 Auma-Weidatal / Germany QSIL Ingenieurkeramik GmbH / Gewerbepark 11 / 96528 Frankenblick / Germany QSIL is the specialist when it comes to advanced solutions made from high-performance materials, fused silica and engineered ceramics. From the prototype to the serial production of complex special components made of individually optimized materials - QSIL offers an extensive product and material portfolio.