Thermal and mechanical characterization of borosilicate glass core. The chemical composition and some physical and material properties are listed in tables 1 and 2, respectively. Borofloat 33 borosilicate glass schott north america. Three times the thermal shock resistance of soda lime glasses along with a thermal expansion comparable to that of silicon. Kic has low values for brittle materials, high values for tough materials value 0. Pdf development of photonic crystal fibers made of two or more types of glasses can be of considerable advantage in designing of specific. Publishers pdf, also known as version of record includes final. Simax technical information the chemical composition and properties of simax glass place it in group 3.
Borosilicate float glass, this is a highly chemically resistant borosilicate glass with a low thermal expansion. Soda lime glass is the most prevalent type of glass and is prepared by melting the raw materials, such as soda, lime, silica, alumina, and small quantities of fining. Borofloat 33 thermal properties special glass, glass. Its wide range of outstanding product properties, such as its high thermal and chemical resistance, its excellent transparency and its good surface quality, allow access to new and high tech special glass applications. Tempered glass is glass that has been treated to make it stronger and safer. Borofloat 33 mechanical properties the sum of its properties is what makes it unique.
Pdf modification of borosilicate glass composition for joint thermal. Borofloat glass borofloat glass is manufactured by schott, and is a highly chemically resistant borosilicate glass with low thermal expansion that is produced using the float method. Borosilicate glasses are known for having very low coefficients of thermal expansion. Borofloat 33 from germany is the worlds first floated borosilicate flat glass.
Borofloat 33 glass, produced by schott glass, has the following properties. Borofloat 33 mechanical properties glass processing. Different types of specialized glass have unique properties that are desired in different situations. There are 494 suppliers who sells borofloat glass on, mainly located in asia. Physical properties and chemical composition of code 7740 glass properties composition %approx. Schott research and development summarized their physical and technical glass properties 1.
In general, glass is weaker with increasing moisture in the air and is able to withstand rapid, short loads better than slow lengthy loads 2. The result was borofloat 33 the worlds first floated borosilicate glass. Its used often as a standard of comparison for other glass materials. Sodalime glass sodalime glass is often referred to as float glass because it is formed by drawing glass over molten tin baths. Thanks to its low alkali content, borofloat 33 works as agood electric insulator. This glass can be further processed to produce controlled pore glass cpg which is widely used as a stationary media in chromatography, or. Our schott borofloat 33 wafers have excellent mirrorlike surface, a high degree of flatness and an outstanding optical quality. Mechanical response of borosilicate and sodalime glass. Develop and characterization of transparent glass matrix. Following is a matrix of standard borofloat wafer specifications which can be produced and shipped quickly most often within two weeks. Borosilicate glass remains both clear and strong when exposed to high temperatures. Borosilicate glass an overview sciencedirect topics. Si02 na 2 cao al a2 bl d2 temperature 1 percent 50.
Nbk7 is a very pure universal optical glass made by schott. Most float glass is sodalime glass, although relatively minor quantities of specialty borosilicate. Borofloat 33 is a clear, colorless floated borosilicate glass produced by schott. Glass composition observed index computedindexanddifferences annialing no. Borosilicate glass properties special glass, glass. Such glass is subjected to less thermal stress and can withstand temperature differentials. Borofloat borosilicate float glass advanced optics. It is available in many forms and sizes such as rod, tube, plate and as machined or hot formed components. Material properties of quartz, fused silica and borosilicate glass quartz fused silica borosilicate glass composition sio 2 100 % sio 2 100 % sio 2 approx.
Schott borofloat 33 glass wafers properties valley design. In addition to standard borosilicate, swift glass also offers infrared reflecting borosilicate irr borosilicate, also commonly known as a hot mirror. It is characterized by excellent flatness and better resistance to heat. The glass can be recycled several times and disposed of without difficulties. The relatively hard borosilicate crown glass consists of purest raw materials. Borofloat glass, a floated borosilicate glass, made by schott is recognized for its outstanding material properties in a wide range of applications. It is considered environmentally friendly as it contains no heavy metals arsenic, antimony, barium, or. Borosilicate is the material of choice for many industries because of its affordability especially the biomedical and research industries. The chemical composition and physical properties of borofloat 33 are in accordance with din iso 3585 and en 1748 t1. The high quality resulting from the float glass process opens.
Float glass is a sheet of glass made by floating molten glass on a bed of molten metal, typically tin, although lead and other various lowmeltingpoint alloys were used in the past. The chemical composition and physical properties of borofloat 33 are in accordance with astm e 43892 2001, type 1, class a. The top countries of suppliers are united states, china, and singapore, from which the percentage of borofloat glass supply is 1%, 98%, and 1% respectively. Borosilicate glass is chemically resistant, has a low thermal expansion coefficient and can be used at relatively high temperatures. It contains very few inclusions and is almost free of bubbles. It is by far the most common material for many optical glass applications, because it offers good optical properties and a reasonable price. Borosilicate glass is a type of glass with silica and boron trioxide as the main glassforming constituents. Glass ribbon liquid tin float bath molten glass chemical composition borofloat 33 from germany is the worlds first floated borosilicate flat glass. Highborate borosilicate glass is also known as leachable alkaliborosilicate glass with an optimum composition of 62.
Borosilicate glass properties of borosilicate glass. Nbk7 optical borosilicatecrown glass from schott bk 7. Due to its high boron content, borofloat 33 can be used as aneutron absorber glass in nuclear energy applications. Custom glass fabrication services products b270 glass d263 glass schott filter glass soda lime glass borofloat glass af45 alkali free glass low iron float glass 94. This method gives the sheet uniform thickness and very flat surfaces. The visible light transmittance 400760nm of code no. It is one of the most common glasses used to produce highquality optics, mainly for the visible spectrum. Borofloat 33 borosilicate glass schott ag schott ag. Borosilicate glass is very crackresistant glass that is perhaps most commonly found in laboratory glassware.
The index of refraction of some sodalimesilica glasses as. Rediscover borofloat 33 and experience the infinite potential of our most versatile material platform. 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. It combines superior quality and excellent flat ness with outstanding thermal, optical, chemical and mechanical features. Its chemical composition and its principal physical properties are. The structure of borosilicate glasses technische universiteit. Borofloat 33 is a high quality boro silicate glass with outstanding properties for a widerange of applications. Other key properties of borofloat are its mirror like surface quality, high. Borosilicateborofloat discs and plates glassblowing. Produced by schott, borofloat is a highly chemical resistant borosilicate glass with low thermal expansion a preferred material for chemical etching download the material specification pdf below.
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