Fused Quartz Base Materials - Properties and Applications

By AZoM

Table of Contents

Fused Quartz Tubing Grades

As a major distributor within Europe Multi-Lab is dedicated to holding large stocks of high purity Fused Quartz Tubing from the world’s largest manufacturers. These stock sizes range from 3 mm O/D through to 580 mm O/D.Lengths up to 3,500 mm are available. All the company’s materials have high transmittance, purity and temperature with low hydroxyl content. Multi- lab offers three basic types of quartz glass types, each designed to fulfil specific performance requirements:

• Clear fused quartz tubing (OH <.00ppm).
  Utilized mainly in high temperature and high performance lamps such as quartz halogen, mercury, ultra-violet (UV) lamps, semiconductor quartz ware, wave-guide handles thermocouples and high temperature products.
• Clear Fused quartz tubing OH <1.00ppm)
  Within the high specification of this material the extremely low hydroxyl level makes it the ideal material for producing metal halide lamp envelopes and other applications requiring extremely low hydroxyl content.
• Clear fused quartz tubing doped with titanium.
  This material is commonly called 'germicidal' or 'ozone free' quartz glass. It is produced to transmit UV-A and UV-B while blocking the deep high wavelengths. This makes it a suitable material for many disinfecting applications and various other UV treatment applications.

Quartz Transparent Rods

Multi-Lab has a range of drawn quartz rod. The clear fused quartz rod of the company has minimal air lines and inclusions, and excellent dimensional stability. This material is natural quartz pulled from a Single-step furnace, the rod is directly drawn in a continuous electrical-fusion process that covers an outer diameter range from 1.00 mm to 90.00 mm. These rods are produced in non-semiconductor and semiconductor grades. Above this size the company 'core-drills' ingot material. This can be natural or synthetic.

Sizes range up to 550 mm diameter with various lengths being catered for, depending on customers' requirements.

Quartz Tubes & Components

A complete range of synthetic quartz is available from Multi-Lab. Ranging from rod form to boules, these can be sliced, ground and polished. This material is an ultra-pure synthetic fused silica for use where optical transmission in the deep ultra-violet spectrum is required or where an ultra-low level of impurities is crucial. It is ideal for all but the most rigorous optical applications. This material is utilized also for a range of UV lamp applications including water purification, ozone generation, paint and ink curing, and chemical processing.

Opaque Quartz Glass

With opaque material it is the material’s microporosity that gives this material its specific properties - superior to other materials on the market. Excellent thermal shielding, high density, excellent thermal shielding, blocks IR transmission, smooth surface finish, and cost efficient is the way the material is machined. Opaque quartz glass material can be applied at high temperatures in aggressive environments with standing temperatures up to 1100°C.

Quartz Polished Discs & Profiles

Full machining, grinding and polishing of quartz are catered for. The normal tolerances are ± 0.2 mm on diameter and ± 0.2 mm on thickness and flatness, 1 wavelength per cm, tighter tolerances can be achieved if required.

Quartz Rolled & Polished Plates

Multi-Lab stocks a large range of quartz glass plates in various dimensions and material grades. Also the company holds stocks of high-quality ingots and block material which allows a higher versatility in terms of shape, size and surface finish.

Quartz Cones, Sockets and Cup & Ball Joints

All Multi-Lab standard quartz cone and socket tapered joints maintain high quality with such properties as surface finish, uniform wall thickness, and accuracy of taper. They are also tooled or machined on Momentive or Heraeus material ensuring a first class product every time. In certain cases Multi-Lab used thicker walled material than the industry standard for greater strength to assure reliability. The company currently supplies cones, sockets and ball joints from 5/20 up to 230/60 and can supply larger diameters’ on request.

Joints

Taper Joints

Ball & Socket

Sockets

All the joints from Multi-Lab have the following advantages

• Bevelled edges for greater chip resistance.
• Exclusive extra heavy rim on all outer joints for greater impact resistance.
• Standard taper joints comply with the ASTM specifications E676.
• All standard taper joints are ground to a 10:1 taper.
• Large stock levels held.
• Non-standard taper joints and longer lengths are available for quotation upon request.
• Quartz Sockets and Cones conform to ISO R383: 1965 and BS 572/60.
• Spherical Ground Ball & Cup Joints (BS2761).

Quartz Sintered Discs

Multi-Lab holds stocks of sintered quartz filter discs in various porosities and dimensions, six different porosity types are offered from extra coarse to extra fine allowing precise adjustment to the particles to be retained during filtration.Standard disc sizes ranging from 5 mm to 120 mm outer diameter and thicknesses between 2.5 mm and 8 mm.

Fused Quartz Discs

Quartz Wool

Quartz wool is a stock item packed in bags 2 to 12 or 5 to 30 µm as10, 500 and 1000 g.

Fused Quartz Wool

About Multi-Lab

Multi-Lab is one of the leading High Purity Natural and Synthetic Quartz Glass distributors in Europe. Multi-Lab has always been a defining force in the sale and fabrication of quartz glass within the Semiconductor, Fibre Optic and Lighting industries.

They are also able to manufacture a range of components to customer specification in various other technical ceramics such as alumina, zirconia, silicon carbide, steatite, boron nitride, cordierite, silicon nitride and Macor.

This information has been sourced, reviewed and adapted from materials provided by Multi-Lab.

For more information on this source, please visit Multi-Lab.