Opening: 00AM - 24PM
Fused Silica? Fused Quartz? What is the difference?

Modern Definition. Fused Silica (also known as Synthetic Fused Silica) is made from a silicon-rich chemical precursor, usually using a continuous flame hydrolysis process, which involves chemical gasification of silicon, oxidation of this gas to silicon dioxide, and thermal fusion of the resulting dust (although there are alternative processes).

Get Price
Making of fused quartz and fused silica - heraeus

There are two sets of process families, one where the deposited nano-particles are directly melted to a condensed fused silica layer, and one, where the soot is accumulated and in a secondary process step condensed to transparent fused silica (this process is called vitrification).

Get Price
Synthetic Sapphira vs. Glass, Fused Quartz & Silica ...

Fused silica is a purer version of fused quartz that is made from various silicon gasses. Chemically known as SiO2, silica is "pure" glass. All other commercial glasses are SiO2 with other dopants added to lower the melting temperature and modify optical, thermal and mechanical characteristics.

Get Price
Cristobalite M3000 -Lianyungang Changtong Silica Powder Co ...

Cristobalite flour is melted under the high temperature, Then the silica will be much more pure and steady. The color is much white. After special grinding and separating process,the product has find particles and controllable particle size distribution. It is widely used in the jewelry investment casting, high grade paints, silicone rubber, functional ceramic.

Get Price
Quartz Material | Swift Glass

Quartz is extremely pure and therefore has high working and melting temperatures. Its optical and thermal properties make it superior to those of other glass materials due to its purity. Quartz and fused silica are ideal for semiconductor fabrication and laboratory equipment.

[PDF]Get Price
Silver Supplies | Jewelers Crucibles and Melting Dishes

Melting dish with removable handle makes it easy to melt and pour metals. Wooden handle resists heat and fused silica dish with clay bond is suitable for melting metals with high melting points, including platinum. Overall length is 14".

Get Price
FUSED SILICA - Imerys Refractory Minerals - The global ...

Fused Silica Fused silica is high purity quartz sand that has been melted to form glass. High volume stability, low volumetric expansion and high purity make fused silica a very useful and versatile material for refractory applications, whether in aluminum launders or other highly cyclical applications.

Get Price
Silicon dioxide - Wikipedia

Pure silica (silicon dioxide), when cooled as fused quartz into a glass with no true melting point, can be used as a glass fiber for fiberglass. Production [ edit ] Silicon dioxide is mostly obtained by mining, including sand mining and purification of quartz .

  • Boiling point: 2,950 °C (5,340 °F; 3,220 K)Get Price
Melting Point of Glass - The Physics Factbook

Silica by itself makes a good glass (fused silica), but its high melting point (1723 °C or 3133 F) and its high viscosity in the liquid state make it difficult to melt and work." 1723 °C Science and Technology Desk Reference, The Carnegie Library of Pittsburgh Science and Technology Department: 2000.

Get Price
Fused quartz - Wikipedia
45 oz Fused Silica Melting Crucible [17413] - $16.82 ...

Legend Inc. Sparks, Nevada USA 45 oz Fused Silica Melting Crucible [17413] - Fused Silica Melting Crucible Outside dimensions: 3.5"Dia x 3.5"High 2500F 1371C 45 troy oz

Get Price
Amazon: Melting Dish Silica Crucible Casting Jewelry ...

New Melting Crucible This is a new melting crucible This size is great for use with a melting furnace This is the best choice for gold, silver, bronze, etc Made of fused silica with clay bond for melting temperatures up to 2,500°F (1,371°C) Pouring spout measures approximately 3/8" (9.5 mm) The outside measures approximately 3 1/2" x 3 1/2 ...

Properties of fused silica - heraeus

The purities of fused quartz and fused silica are outstandingly high. Synthetic fused silica from Heraeus contains total metallic contamination below 1ppm. For fused quartz the amount is approximately 20 ppm and consists primarily of Al2O3 with much smaller amounts of alkalis, Fe 2 O 3, TiO 2, MgO and ZrO 2 .

Get Price
Understanding Fused Quartz and Fused Silica | Machined ...

This process is carried out in vacuum in order to prevent inclusion, ripple and bubble formation in the viscous melt. The temperature at which the melt is processed is 1900 degrees centigrade. The chemical composition of fused quartz is the same as that of fused silica, and its chemical representation is Si02, or, Silicon dioxide.

Get Price
UV vs. IR Grade Fused Silica | Edmund Optics

There are many types of fused silica, the most common include UV grade fused silica and IR grade fused silica. UV grade fused silica is manufactured synthetically through the oxidation of high purity silicon by flame hydrolysis. 2 The UV grade demonstrates high transmittance in the UV spectrum, but there are dips in transmission centered at 1.4µm, 2.2µm, and 2.7µm due to absorption from hydroxide (OH-) ion .

Get Price
Refractive index of SiO2 (Silicon dioxide, Silica, Quartz ...

Fused silica, 20 °C. References. 1) I. H. Malitson. Interspecimen comparison of the refractive index of fused silica, J. Opt. Soc. Am. 55, 1205-1208 (1965) 2) C. Z. Tan. Determination of refractive index of silica glass for infrared wavelengths by IR spectroscopy, J. Non-Cryst.

Get Price
Quartz Tube & Rod

Quartz Tube & Rod. Quartz tube products are engineered to optimize performance or economy for specific applications. Our quartz tubes are available in clear fused quartz glass as well as synthetic fused silica. F&D carries a wide range of sizes to cover applications such as general lighting, laser flash lamps, digital projection,...

Get Price
Borofloat 33, Fused Silica, Corning 7980 & Quartz | Glass ...

Fused silica wafers are the most simple chemical composition of non-crystalline silica glass. The glass consists of amorphous silicon dioxide that is formed into wafers in a chemical vapor deposition chamber. Silicon precursors are burned with oxygen in order to form nano particles of SiO 2, which are then melted and deposited in a thin film on ...

Get Price
Materials Data - Fused Silica / Fused Quartz | Esco Optics ...

Fused Silica / Fused Quartz Fused silica is a high-purity, non-crystalline material manufactured through oxidation of raw silica in a flame hydrolysis process, while fused quartz is fabricated by the melting of naturally occurring quartz.

Get Price
Fused Silica Information - Precision Applied Products

Fused Silica Window Chemical Composition -This glass consists solely of the amorphous (non-crystalline) type of high-purity silica (SiO2). Other popular glasses, on the other hand such as (Pyrex, borosilicate, soda-lime, etc.) are blended composition glasses they will include components such as Na2O, CaO, and B2O3 in relation to SiO2.

Get Price