Purity, and what that purity buys. High silica sits above 96 percent SiO2, quartz fiber above 99.9 percent. Both share a softening point around 1700 degrees Celsius, so on temperature alone they are comparable.

The difference shows in the electrical and dimensional properties. Quartz fiber has a dielectric loss factor of 0.0002 and a linear expansion coefficient of 0.55 x 10 to the minus 6 per Kelvin, both far better than high silica can offer. If your application needs radar transparency, high frequency signal integrity or tight dimensional stability, quartz is necessary. If it needs heat resistance only, high silica does the same job for considerably less money.

Because it solves two problems that usually conflict. A radome has to survive aerodynamic heating and physical impact, which normally means a dense structural material, and it has to let radar energy pass through unimpeded, which normally means the thinnest possible barrier.

With a dielectric constant of 3.74 and a loss factor of 0.0002 at 10 GHz, quartz fiber absorbs very little of the energy passing through it. The antenna behind the radome sees essentially what it would see without one, while the structure still protects it. Very few materials manage both at once.

From 0.06 mm to 3 mm, in widths from 45 to 120 cm, in plain, twill and satin weave structures.

That range is wider than it may appear. A 0.06 mm cloth is close to tissue in weight and is used where the fabric must not add bulk, typically in electronics and precision composites. A 3 mm construction is a substantial structural fabric. Tell us the application and we will suggest a thickness, since buyers frequently specify heavier than they need.

Plain weave is the most stable and the easiest to cut and handle, and it is the usual default for flat applications. Satin drapes considerably better, which matters when the fabric has to conform around a curved or complex shape without wrinkling. Twill sits between the two.

If the fabric is going into a composite layup over contoured tooling, satin is usually worth the extra handling care. For flat insulation or straightforward reinforcement, plain is the sensible choice.

It is used as a replacement for silicate and asbestos fibres in a range of applications, and that substitution is a meaningful part of current demand as older materials are phased out.

Whether it substitutes in your specific case depends on what the original material was doing. If the requirement was heat resistance and electrical insulation, quartz fiber generally covers it. If the requirement included something asbestos did particularly well and quartz does not, the substitution may need engineering rather than a straight swap. Describe the application and we will give you an honest view.

Twist, mainly. Yarn carries a moderate twist of 30 to 200 turns per metre and is intended for weaving and braiding. Roving carries almost none, 10 turns per metre or less, so it spreads and wets out properly in resin during composite processing. Sewing thread carries high twist, 120 to 300 turns per metre, so it survives repeated passage through a needle.

Using the wrong one causes predictable problems. Roving used as sewing thread breaks. Sewing thread used in a composite does not wet out properly and leaves dry spots.

We supply four grades: 0.7 to 1, 1 to 3, 3 to 5 and 5 to 8 micron. The choice is a performance decision rather than a cost saving one.

Finer filaments give higher filtration efficiency and lower thermal conductivity, at the cost of higher pressure drop across a filter and more difficult handling. Coarser filaments are easier to work with and let more through. For gas filtration, tell us the particle size you need to capture and the pressure drop you can tolerate, and the grade follows from those two numbers.

Yes, and for aerospace and electronics customers it is usually necessary rather than optional. Request it at the quotation stage so it can be prepared alongside the goods.

We publish standard against measured values openly, as shown in the quality data section above. A supplier reluctant to provide batch level test results is worth questioning further, because in a material where purity is the entire value proposition, the numbers are the product.

Yes. Samples of standard specifications are normally available, and for a material at this price point we would strongly prefer you tested it rather than took our datasheet on trust.

Tell us the intended application when you request one. Handling differs considerably between forms and between weave structures, and a sample matched to your actual process tells you far more than a generic swatch.

It depends on the form and whether the specification is standard or custom. Standard specifications carry a lower minimum. A custom cloth thickness, a non standard yarn linear density or a specific chopped length each need their own production run, which raises both the minimum and the lead time.

Tell us the form, the specification and your rough volume and we will confirm the exact figure with your quotation.

The seven forms cover the great majority of requirements, but if your application needs something else, ask rather than assuming it is unavailable.

We also produce a matching quartz fiber sewing thread specifically so that fabric assemblies can be stitched without introducing a weak point, which is the kind of gap that only becomes obvious once you have tried to build something. If you have found a similar gap, tell us.

Payment is normally by T/T, structured as a deposit with the balance settled before shipment. We confirm the exact split with your quotation.

EXW, FOB, CIF and DAP terms are all available, so you can pick whichever fits how your freight is already arranged. If you have a nominated forwarder we will work with them directly.