EQUIPMENT MADE QUARTZ GLASS

Brand Owner Address Description
HERAEUS QUARTZTECH HERAEUS HOLDING GMBH Heraeusstrasse 12-14 Hanau D-63450 Germany Equipment made of quartz glass for use in the chemical industry, the electronic industry, the semiconductor industry and for laboratory use, namely, crucibles, trays, belljars, flanges, boats/wafer carriers, tube reactors for diffusions and epitaxial growth, catalyst carriers; products made of quartz glass for use as auxiliary devices in the fiber optic industries, namely muffle tubes, inner- and outer-downfeet-handles, irradiator tubes, cleaning heads, quartz rings none of the above being for use for, with or in relation to circuit element crystals, crystal filters, or to control the frequency of an oscillator;
 

Where the owner name is not linked, that owner no longer owns the brand

    
Technical Examples
  1. A known quartz glass crucible for crystal pulling consists of a crucible wall, having an outer layer which is provided in an external area thereof with a crystallisation promoter which results in crystallisation of quartz glass, forming cristobalite when the quartz glass crucible is heated according to specified use in crystal pulling. The aim of the invention is to provide a quartz glass crucible which has a long service life. As a result, the crystallisation promoter contains, in addition to a silicon, a first component which acts as a reticulating agent in quartz glass and a second component which is free of alkali metals and which acts as an agent forming separating points in quartz glass. The above mentioned components are contained and incorporated into a doping area (8) of the outer layer (6) having a layer thickness of more than 0.2 mm.