Quartz is one of the most common minerals in the earths crust. All silica forms are identical in chemical composition, but have different atom arrangements. 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. Schott research and development summarized their physical and technical glass properties 1. As such, it was formerly covered by oshas limit for quartz table z3. Fused silica can operate down to 190 nm and all through the visible.
Tighter specification for bubbles and inclusions down to. 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. Fused silica is a noncrystalline glass form of silicon dioxide quartz, sand. Vitreous silica, in all its forms, offers a variety of properties such as. Silica sand, ground silica and fine ground silica page 2 of 10 component cas no. Pdf in over 100 years of quartz glass fabrication, the applications and the. This glass can be further processed to produce controlled pore glass cpg which is widely used as a stationary media in chromatography, or. Glass codes 7980, 7979, and 8655 are high purity noncrystalline silica glasses with excellent optical qualities. 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.
This neglects the specific glass composition, subcritical crack growth, surface area under stress, and nature of the load static or cyclic. Please refer to the thermal properties for your application. Silica is another name for the chemical compound composed of silicon and oxygen with the chemical formula sio2, or silicon dioxide. Obsidian is a common volcanic glass with high silica sio2 content formed when felsic lava extruded from a volcano cools rapidly. The main differences are that fused silica transmits better in the uv and fused quartz is lower in oh content. High purity fused silica hpfs fused silica corning. Properties with values for just one material 6, in this case are not shown. Both borosilicate glass and fused silica are glass and glass ceramics. Glass from glasa, germanic for amber, the shiny or. Although the terms fused quartz and fused silica are used interchangeably, the optical and. Etched surface roughness of bsg and fused quartz were studied after shallow etching 4, however deep etching was not explored.
Quartz is the most stable crystal modification at normal temperature and pressure conditions. 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. Evaluation and significance of important glass properties. Normal varieties contain water that gives strong absorption in the ir.
Fused silica is used for uv and visible components. Silicon dioxide glass quartz fused silica silicon dioxide sio 2 is the most simple chemical composition of glass. 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. 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. The noncrystalline, colorless, silica glass combines a very low thermal expansion coefficient with excellent optical qualities and exceptional transmittance in the ultraviolet. Tosoh silica glass materials usghs version date prepared. Part number size thickness thickness tolerance surfacequality price ofq 020 6. 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. Fused silica glass is a good electrical insulator, retaining high resistivity at elevated temperatures and excellent highfrequency characteristics. Fused silica 674 bk7 774 sf5 519 sk16 710 lak10 865 f2 500 sf58 346 table 2. Fused silica can resist sudden heating and quenching, but it does have its limits. We offer many different grades of fused silica to support various product applications. If irritation develops from breathing dust, move the person from the overexposure and seek medical attention if needed.
Fused silica glass is a good electrical insulator, retaining high resistivity and excellent highfrequency characteristics at elevated temperatures. Fused silica is a hard, high temperature pure glass. Silica compounds can be divided into two groups, crystalline or c silica and amorphous. For more specific values, follow the links immediately below. This paper presents a quantitative analysis of the indentation fracture of fused silica involving densification with the embedded center of dilation ecd model. It is unclear how the densification of fused silica influences the damage of its precision optics subjected to machining.
Highgrade schott borosilicate flat glasses are used in a wide variety of. This synthetic material, normally referred to as silica or synthetic fused silica, has better optical properties and is. For the y2o3al2o3sio2 core composition, the measured. Elastic constants for glasses and glass ceramics code type e gpa g gpa 9606 glass ceramic 17. For each property being compared, the top bar is borosilicate glass and the bottom bar is fused silica. Glass codes 7979, 7980, and 8655 are high purity noncrystalline silica glasses with excellent optical qualities. Fused silica is the glass form of quartz and is thus isotropic. Follow the links below to view complete property information. Fused quartz or fused silica is glass consisting of silica in amorphous noncrystalline form. Press release 2014 4 image is in the public domain. Pdf carbon coating of fused silica ampoules walter. This work analyzes etching parameters of fs and bsg to. It has a fairly low density among the glass and glass ceramics in the database.
Several methods to characterize the strength of optical glass are discussed to aid. Exposure to fused silica has long been known to cause the fibrogenic lung disease, silicosis. Fused silica, therefore, has high working and melting temperatures. Fused silica is a colorless, odorless solid that is a form of quartz.
Tosoh n, np, and s materials are fused in a tosoh proprietary oxy hydrogen flame fusion process that. A quantitative analysis of the indentation fracture of. Product characteristics include extraordinary low refractive index variations leading to stateoftheart. Corning, and one aluminoborosilicate glass schott borofloat33. The properties of fused silica include two common variations.
It is very popular due to cheap production, as it is made from sand, very good thermal dimensional stability, and its durability. 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. Fused silica, commonly referred to as synthetic fused quartz, is produced using high purity silica sand that is manufactured from sicl 4. Infrared grades of fused silica are available for nir use. Fused silica is offered in many different grades to support various product applications. Borosilicate glass an overview sciencedirect topics. To expand the transmission graphs, please click on. Vesuvius manufactures and designs a wide range of fused silica products for the glass industry. Deep nld plasma etching of fused silica and borosilicate glass. This page shows summary ranges across both of them. The finished product is a transparent glass with an ultrahigh purity and improved optical transmission. There are 24 material properties with values for both materials.
Minimal castable shrinkage creates a mold that is truer to shape, which helps produce a more accurate part. Threedimensional printing of transparent fused silica glass. Its highly cross linked three dimensional structure gives rise to its high use temperature and low thermal expansion coefficient. Vesuvius provides engineered fused silica products used in glass melting furnaces for both molten glass contact and furnace superstructure. For the y2o3al2o3 sio2 core composition, the measured.
Using stereolithography 3d printers, a silica nanocomposite is shaped and then fused to produce nonporous, very smooth, highly transparent fused silica glass components. 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. Quartz glass for optics data and properties 2 bubbles or inclusions. Threedimensional printing of transparent fused silica glass frederik kotz 1, karl arnold 1, werner bauer 2, dieter 1schild 3, nico keller 1, kai sachsenheimer 1, tobias m. Typical of glasses, it lacks long range order in its atomic structure. Fused silica and borosilicate glass have different silica matrices, therefore etching will be different. Coefficient of expansion electrically fused quartz item unit n.
684 613 491 975 1301 645 594 1260 1390 1520 1549 65 524 1149 466 19 473 1385 369 455 780 935 1584 1257 886 1071 1180 958 594 321 308 1197 1110 1291 118 1398