Obsidian is a common volcanic glass with high silica sio2 content formed when felsic lava extruded from a volcano cools rapidly. Results are displayed up to a maximum of 200 materials per page. A reliable method for depositing a layer of carbon on the inner walls of a fused silica ampoule is described and characterized. Minimal castable shrinkage creates a mold that is truer to shape, which helps produce a more accurate part. Typical of glasses, it lacks long range order in its atomic structure. Coefficient of expansion electrically fused quartz item unit n. Fused silica is a noncrystalline glass form of silicon dioxide quartz, sand. Etched surface roughness of bsg and fused quartz were studied after shallow etching 4, however deep etching was not explored.
Normal varieties contain water that gives strong absorption in the ir. The main differences are that fused silica transmits better in the uv and fused quartz is lower in oh content. Highgrade schott borosilicate flat glasses are used in a wide variety of. It is very popular due to cheap production, as it is made from sand, very good thermal dimensional stability, and its durability. Quartz is the most stable crystal modification at normal temperature and pressure conditions. For trace amounts, however, this decrease is less than 0. Silica glass is a kind of glass as the name is implied, but silica glass is composed of by almost only sio 2, while, on the other hand, other glasses are composed of by various kinds of elements. Fused silica is a colorless, odorless solid that is a form of quartz. The finished product is a transparent glass with an ultrahigh purity and improved optical transmission. Tosoh n, np, and s materials are fused in a tosoh proprietary oxy hydrogen flame fusion process that. Silica sand, ground silica and fine ground silica page 2 of 10 component cas no.
Vitreous silica, in all its forms, offers a variety of properties such as. The noncrystalline, colorless, silica glass combines a very low thermal expansion coefficient with excellent optical qualities and exceptional transmittance in the ultraviolet. Several methods to characterize the strength of optical glass are discussed to aid. This work analyzes etching parameters of fs and bsg to. Tighter specification for bubbles and inclusions down to. Quartz glass for optics data and properties 2 bubbles or inclusions. Evaluation and significance of important glass properties. This synthetic material, normally referred to as silica or synthetic fused silica, has better optical properties and is. There are 24 material properties with values for both materials. Fused silica glass is a good electrical insulator, retaining high resistivity and excellent highfrequency characteristics at elevated temperatures. To download this data as a pdf file, or to download our msds safety data sheet, please click on the links at the top of the page. Fused silica, therefore, has high working and melting temperatures.
To expand the transmission graphs, please click on. Schott duran borosilicate glass in the laboratory consumption or its. In terms of chemical composition, silica glass is the simplest amorphous substance that has been commercially utilized in many fields of application in a number of industrial branches, thanks to its physicochemical properties. If irritation develops from breathing dust, move the person from the overexposure and seek medical attention if needed. Quartz is one of the most common minerals in the earths crust.
Moore avenue, santa ana, ca 92704 fused silica pricing. As such, it was formerly covered by oshas limit for quartz table z3. Fused silica, commonly referred to as synthetic fused quartz, is produced using high purity silica sand that is manufactured from sicl 4. It has a fairly low density among the glass and glass ceramics in the database. Fused silica is used for uv and visible components. We offer many different grades of fused silica to support various product applications. Silica is another name for the chemical compound composed of silicon and oxygen with the chemical formula sio2, or silicon dioxide. The search phrase you entered, fused silica, is common to materials, by searching on the exact phrase fused silica in the most common text fields. Tosoh silica glass materials usghs version date prepared. Its highly cross linked three dimensional structure gives rise to its high use temperature and low thermal expansion coefficient. Please refer to the thermal properties for your application. Corning, and one aluminoborosilicate glass schott borofloat33. Vesuvius manufactures and designs a wide range of fused silica products for the glass industry.
This paper presents a quantitative analysis of the indentation fracture of fused silica involving densification with the embedded center of dilation ecd model. Deep nld plasma etching of fused silica and borosilicate glass. Product characteristics include extraordinary low refractive index variations leading to stateoftheart. Fused silica is the glass form of quartz and is thus isotropic. Properties with values for just one material 6, in this case are not shown. This page shows summary ranges across both of them. Using stereolithography 3d printers, a silica nanocomposite is shaped and then fused to produce nonporous, very smooth, highly transparent fused silica glass components. Both borosilicate glass and fused silica are glass and glass ceramics. Glass codes 7979, 7980, and 8655 are high purity noncrystalline silica glasses with excellent optical qualities. Glass properties on globalspec, glassonweb, matweb, glass global a general overview about glass art, history, science, literature, social studies, and technology is available at the corning museum of glass view as pdf, 1. All silica forms are identical in chemical composition, but have different atom arrangements.
Fused silica and borosilicate glass have different silica matrices, therefore etching will be different. Threedimensional printing of transparent fused silica glass. For the y2o3al2o3sio2 core composition, the measured. Excimer grade fused silica with very low fluorescence 1 max. Part number size thickness thickness tolerance surfacequality price ofq 020 6. Although the terms fused quartz and fused silica are used interchangeably, the optical and. It differs from traditional glasses in containing no other ingredients, which are typically added to glass to lower the melt temperature. Glass codes 7980, 7979, and 8655 are high purity noncrystalline silica glasses with excellent optical qualities.
For each property being compared, the top bar is borosilicate glass and the bottom bar is fused silica. Datasheet fsuv1 fused silica fqvis2 fused quartz fsuv1 fused silica fqvis2 fused quartz samples ex stock fused silica is the glassy form of quartz and is thus isotropic. Silica compounds can be divided into two groups, crystalline or c silica and amorphous. Pdf in over 100 years of quartz glass fabrication, the applications and the. Fused silica is offered in many different grades to support various product applications. Fused silica 674 bk7 774 sf5 519 sk16 710 lak10 865 f2 500 sf58 346 table 2. High purity fused silica hpfs fused silica corning. Press release 2014 4 image is in the public domain. Fused silica can operate down to 190 nm and all through the visible.
This glass can be further processed to produce controlled pore glass cpg which is widely used as a stationary media in chromatography, or. Silicon dioxide glass quartz fused silica silicon dioxide sio 2 is the most simple chemical composition of glass. Elastic constants for glasses and glass ceramics code type e gpa g gpa 9606 glass ceramic 17. Pdf carbon coating of fused silica ampoules walter. For the y2o3al2o3 sio2 core composition, the measured. Vesuvius provides engineered fused silica products used in glass melting furnaces for both molten glass contact and furnace superstructure. For more specific values, follow the links immediately below. Fused silica glass is a good electrical insulator, retaining high resistivity at elevated temperatures and excellent highfrequency characteristics. Effect of glass composition and fiber diameter on tensile strength a fused silica in vacuum after baking b fused silica in dry atmosphere c fused silica in moist atmosphere d borosilicate glass in dry air e borosilicate glass in air f soda lime silicate glass in air fatigue behavior of glass breaking stress versus duration mpa kpsi. Fused silica can resist sudden heating and quenching, but it does have its limits. More specifically, type ii modifications in silicate glass. Fused silica is a hard, high temperature pure glass. Impactite is a form of glass formed by the impact of a meteorite, where moldavite found in central and eastern europe, and libyan desert glass found in areas in the eastern sahara, the deserts of eastern libya and. The amount of metallic impurity contained in silica glass is extremely little, and even silica glass having large amount of metallic impurity has only several 10 ppm and silica glass having small.
Highborate borosilicate glass is also known as leachable alkaliborosilicate glass with an optimum composition of 62. Follow the links below to view complete property information. Schott research and development summarized their physical and technical glass properties 1. Borosilicate glass an overview sciencedirect topics. Optical materials product information specialty materials. A quantitative analysis of the indentation fracture of. It is unclear how the densification of fused silica influences the damage of its precision optics subjected to machining. Infrared grades of fused silica are available for nir use. The properties of fused silica include two common variations. Exposure to fused silica has long been known to cause the fibrogenic lung disease, silicosis. Hpfs fused silica glasses are known throughout the industry for their. This neglects the specific glass composition, subcritical crack growth, surface area under stress, and nature of the load static or cyclic. Fused quartz or fused silica is glass consisting of silica in amorphous noncrystalline form.
1507 748 1199 1117 1424 1200 1256 772 292 278 1386 1229 490 86 1473 174 1531 1130 1159 1581 1250 747 39 736 1240 407 1379 1345 1545 605 1358 1255 434 661 1236 491 292 413