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Topic: Borosilicate glass

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	Award for Adherent Antireflective Coating on Borosilicate Glass for Solar Collectors
		The Braunschweig Chamber of Commerce and Industry (CCI) awards a prize for the "Adherent antireflection coatings on borosilicate glass for solar collectors" project - Technology transfer prize awarded to scientists of the Technical University of Clausthal.
		Gundula Helsch, Marta Krzyzak, Gerhard Heide and Günther H. Frischat from the "Institut für Nichtmetallische Werkstoffe, Technische Universität Clausthal" are awarded the prize for the project of the "Adherent antireflection coatings on borosilicate glass for solar collectors".
		Borosilicate glass tubes as parts of parabolic-trough solar collectors reflect a total of 8 % of the incident sun light, thus reducing greatly the efficiency of solar power installations.
	www.azom.com /details.asp?newsID=7097 (486 words)

	Basics of Design Engineering - Engineering Materials - Additional Materials - Glass
		Borosilicate glass, the oldest type of glass to have appreciable resistance to thermal shock and higher temperatures, also has excellent resistance to chemical attack.
		Borosilicate glass has a low coefficient of thermal expansion and is, thus, suited for telescope mirrors and other precision parts.
		And 96% silica and fused silica are the hardest of all.
	www.machinedesign.com /BDE/materials/bdemat7/bdemat7_3.html (1141 words)

	Borosilicate glass - Wikipedia, the free encyclopedia
		In addition to the quartz, sodium carbonate, and calcium carbonate traditionally used in glassmaking, boron is used in the manufacture of borosilicate glass.
		Borosilicate glass has a very low thermal expansion coefficient, making it a popular material for objects like telescope mirrors, where it is essential to have very little deviation in shape.
		Borosilicate glass is sometimes used for high-quality beverage glassware; Bodum, Inc. markets a line of French coffee presses and double-walled beverage glasses made of borosilicate, lending them increased durability and microwave/dishwasher compatibility.
	en.wikipedia.org /wiki/Borosilicate_glass (398 words)

	GLASS ALCHEMY, LTD. Benefits of Borosilicate Glass
		Borosilicate is thermal shock resistant—less prone to pop and burn you or your faithful pet.
		Glass Alchemy literature and education have demystified the process of working with borosilicate colors putting you in control of your color and reducing your learning curve.
		Borosilicate is approximately 2.3 times as strong as soda lime (soft glass) making it the glass of choice for many projects such as jewelry, goblets, sculpture and outdoor sculpture.
	www.glassalchemyarts.com /about/boro.html (237 words)

	Garg Scientific Glass Industries
		Borosilicate glass plant and pipeline is used in both internal pressure and vacuum applications.
		Borosilicate glass is resistant to almost all substances except hydrofluoric acid, phosphoric acid and hot strong caustic solutions.
		With borosilicate glass, the transmission of ultra-violet light – which is the great importance for photo-chemical reaction- is somewhat greater in the middle spectrum that with normal window glass.
	gargscientific.com /techinfo.htm (1492 words)

	Scientific Glassblowing Basics
		The swivel is connected to the glass by latex or rubber tubing or a stopper/tubing assembly.
		The type of glass most commonly used in the laboratory today is from the borosilicate glass family.
		If the glass tube is not rotated or heated evenly the glass wall may become lop-sided, thick on one side and thin on the other.
	www.ecu.edu /chem/glassblowing/gb.htm (5304 words)

	Borosilicate Laboratory Glassware, Beakers, Flasks - Goel Scientific (Site not responding. Last check: 2007-10-14)
		Borosilicate glass is chosen for its unique chemical and physical properties.
		Annealing of glass is the process where the glass is heated and kept for a defined period of time to relive internal stresses.
		Borosilicate glass show no appreciable absorption in the visible region of spectrum and therefore appears clear and clour less.
	www.goelscientific.com /technicalInfo1.htm (471 words)

	Solstice Glass - About Borosilicate Glass
		Its composition is different from the "soft" glass that is normally used for beads, paperweights, art glass bowls, ornaments, etc. Borosilicate glass is far stronger than "soft" glass and has been used for everything from stovetop cookware to nuclear waste containment.
		Chemically speaking, borosilicate glass substitutes boron oxide particles in place of the soda and lime particles found in soft glass.
		Also, because of the chemical composition of borosilicate glass, different precious metals such as silver and gold may be used to color the glass in some very unique and amazing ways.
	www.solsticeglass.com /about_borosilicate_glass.html (273 words)

	GLASS BLOWING (Site not responding. Last check: 2007-10-14)
		The glass state is a category of the amorphous state and encompasses solids that may be softened by heating to viscous liquids, which revert to non-crystalline solids when cooled.
		Glass is rigid at ambient temperatures and soft or fluid-like at elevated temperatures.
		This is accomplished by lowering the temperature of the flame by decreasing the flow of oxygen and heating the glass until it is bathed in the yellow flare of sodium.
	chemistry.boisestate.edu /rbanks/glassblowing/glassblowing_history.htm (4957 words)

	GLASS ON WEB - Articles - Borosilicate glass
		Borosilicate glass is a high silicate glass with at least 5% boron oxide bow handle threaded rod with a triangular shaped handle.
		Borosilicate glass is a particular type of glass, better known under the brand names Pyrex and Kimax.
		Borosilicate glass is the oldest type of glass to have appreciable resistance to thermal impact and higher temperatures, also has excellent resistance to chemical attack.
	www.glassonweb.com /articles/article/376 (488 words)

	Glass
		By scratching the surface of glass, it is possible to reduce the local surface tension and with applied pressure, fracture the glass along the scratch.
		Borosilicate glass is made from silica, boric acid, borax and alumina.
		Processing glass typically begins with preparation and melting of the "glass batch." This is followed by machine forming, which replaces much of the historical hand forming.
	www.bsu.edu /web/jcflowers1/rlo/lceramicsglass.htm (887 words)

	Physical Properties
		There are also many different glass types available that are engineered for specific uses such as alumino silicate, lead, nonex, uranium, etc. Most are not readily compatible with one another and must be taken into consideration during the designing phase.
		Borosilicate is by far the most widely used, and prefered, glass for laboratory apparatus.
		Glass is then reheated to eliminate the microscopic holes caused by the chemical treatment.
	www.udel.edu /chem/GlassShop/PhysicalProperties.htm (1308 words)

	Star Scientific Glass Co. (Site not responding. Last check: 2007-10-14)
		All Glass items shown in this catalogue are manufactured from borosilicate glass 3.3 are widely used as the basis for the construction of complete process systems all over the chemical, dyestuff, food pharmaceutical, and petrochemical industries.
		Since this glass expands less, the tensile stresses in the glass wall during heating are less, which means that it is able to withstand a greater thermal shock and the maximum working pressure for a given operating temperature is greater.
		Borosilicate glass 3.3 is highly resistant to water, neutral and acid solutions, concentrated acids and acid mixtures, and to chlorine, bromine, iodine and organic substances.
	www.starscientificindia.com /ti.htm (218 words)

	B&L Tetlow - Borosilicate glass melting furnace (Site not responding. Last check: 2007-10-14)
		A NEW electric glass melting furnace from BandL Tetlow features a system in which borosilicate glass is preheated until it becomes electrically conductive.
		When heat is applied the raw glass materials in the tank slowly softens and becomes conductive.
		In the lower section, an open glass melting tank is manufactured from special dense refractory slabs that are resistant to attack from the molten borosilicate glass.
	www.ferret.com.au /articles/43/0c010843.asp (332 words)

	Glass Ferrules, Fiber Optic Collimator Sleeves
		Borosilicate glass ferrules are the ideal material for superior polishing.
		The Accu-Glass borosilicate glass ferrule and the glass from which fibers are constructed polish at similar rates.
		There are numerous applications in fiber optics for precision glass tubing as an alignment device such as a spacer or to hold a number of other components.
	www.bd.com /accu-glass/products/fiber.asp (569 words)

	Pegasus Glass - Pyrex Borosilicate Glass Properties
		Borosilicate glass is inert to almost all materials with the exception of hydrofluoric acid, hot phosphoric acid and hot alkalies.
		The glass should be adequately supported and appropriate allowance should be made for special conditions such as high temperatures, dense liquids, etc. Subject to the above, maximum working pressures are as specified in the following table.
		Provided borosilicate glass is not subjected to rapid change in temperature, creating undue thermal shock, it can be operated safely at temperatures up to 450°F (232°C).
	www.pegasus-glass.com /pyrex.asp (358 words)

	Corning Museum of Glass \| Resource on Glass \| Types of Glass
		Borosilicate glass is any silicate glass having at least 5% of boric oxide in its composition.
		It is similar to borosilicate glass but it has greater chemical durability and can withstand higher operating temperatures.
		Ninety-six percent silica glass is a borosilicate glass, melted and formed by conventional means, then processed to remove almost all the non-silicate elements from the piece.
	www.cmog.org /index.asp?pageId=739 (361 words)

	Lead-zinc-borosilicate glass - Patent 5096620
		An object of the invention is thus to provide a lead-zinc-borosilicate glass composition particularly useful for the encapsulation of zinc oxide varistors which exhibits improved properties as compared with the known glasses, especially a boundary wetting angle with respect to zinc oxide of at most 40.degree.
		Therefore, these glasses are especially suitable for relatively mild operations during the encapsulation of electronic components, for example resistors, and particularly for the encapsulation of varistors made from zinc oxide.
		For this purpose, the glass powder conventionally has an average grain size in the range of from 5 to 25.mu.m and is suspended in a suitable suspension medium, e.g., the organic vehicles noted on col. 5, lines 24-36 of U.S. Pat.
	www.freepatentsonline.com /5096620.html (2870 words)

	Ace Glass Inc. - FAQS
		There are a lot of differences between borosilicate glass and quartz either pure or synthetic fused silica types.
		Impurities in borosilicate glass are measured in percent; impurities in quartz are measured in PPM.
		Lab glass is generally made from “hard-glass”, (borosilicate), bottles are generally made from “soft-glass” or soda- lime glass.
	www.aceglass.com /faq.php (2716 words)

	Borosilicate Glass Capillary Tubes
		The capillary tubes are supplied in an outer glass tube, supported internally in foam.
		The capillary length is closed at one end and the open neck end is a larger diameter to ease addition of the sample for testing.
		Properties of all three types are shown to allow comparision and to confirm that the correct glass is being chosen for the application.
	www.capillarytubes.co.uk /acatalog/Borosilicate_Glass_Capillary_Tubes.html (154 words)

	Glass-ceramic - Wikipedia, the free encyclopedia
		It is formed as a glass, and then made to crystalize partly by heat treatment.
		While materials such as "vaseline" glass are also glass-ceramics, the term mainly refers to a mix of lithium-, silicon-, and aluminium-oxides which yields an array of materials with interesting thermomechanical properties.
		Originally developed for use in the mirrors and mirror mounts of astronomical telescopes, these materials have become known and entered the domestic market through its use in glass-ceramic cooktops, as well as cookware and bakeware.
	en.wikipedia.org /wiki/Glass-ceramic (508 words)

	Borosilicate Glass
		Borosilicate glasses are a family of glasses developed by glass manufacturers to have good properties for mirrors.
		If temperature effects can be minimized by active thermal control, borosilicate glass offers the possibility of lightweighting by direct honeycomb casting with the advantage of low cost.
		For the same mass as a zero-expansion ceramic meniscus, a honeycomb borosilicate mirror will be stiffer and, with air circulation inside the cells, deformation due to temperature gradients can be reduced to an acceptable level.
	grus.berkeley.edu /~jrg/MATERIALS/node7.html (317 words)

	Anti Reflective Glass, Dichroic, Wafer, Tempered, Glass Coating And Tubing (Site not responding. Last check: 2007-10-14)
		Borofloat® is a flat glass that is produced in a manner similar to float type soda-lime glass.
		However, it available in rolled sheet form rather than float glass and therefore does not have as uniform or as flat a surface as Borofloat® unless it is polished.
		This glass is designed primarily for flat panel display applications but has many desirable characteristics for applications such as optical windows and optical device coating substrates.
	www.abrisa.com /ProductCatalog/GlassTypes/glassTypes_Borosilicate.asp (440 words)

	Glass Art > Boro/Borosilicate/Pyrex Glass Beads - Glass Artists.org
		One of the most important parts of working with hard glass is "playing" with all of the wonderful colors and possibilities each one offers.
		It is made from borosilicate glass and sandblasted for a matte finish.
		All beads were made from borosilicate glass on 3/32 mandrels, and properly annealed in the kiln.
	www.glassartists.org /Gct37_Boro_Borosilicate_Pyrex_Glass_Beads.asp (657 words)

	Borosilicate Glass Wafers: PYREX wafers, Borofloat wafers
		The excellent flatness and a low warp of our borosilicate wafers and the thermal coefficient of expansion close to the one of silicon, facilitate sophisticated applications in the semiconductor industry such as anodic bonding to silicon and various micro optical applications.
		On request, our borosilicate glass wafers can be made with a ground SEMI standard flat or a notch.
		Please use our inquiry form for your custom made glass wafer of borosilicate glass or made of any other glass material.
	www.pgo-online.com /intl/katalog/borosilicate_glass_wafers.html (151 words)

	Glass Marbles [Borosilicate] > Spinning Glass Tops > Handcrafted, Torchworked Glass Art by J&J Glassworks. (Site not responding. Last check: 2007-10-14)
		This blue vortex glass marble was handcrafted by John Long using the ancient Italian method of lampworking.
		The marble is borosilicate crystal the same durable kind of glass as pyrex.
		The marble is made from borosilicate crystal a very durable type of glass.
	www.jandjglassworks.com /site/710064/page/415204 (583 words)

	Teaposy Tea for Two Teapot: Heat Resistant Borosilicate Glass Teapot
		The teapot is made entirely of glass, from the easy-to-grip lid to the beautifully curved handle.
		Teaposy cups, pots, and warmers are made of borosilicate glass that is temperature resistant, lead-free, and made from 20% recycled materials.
		A built-in glass infuser allows your tea to steep to your desired strength, and then it can be easily filtered and poured into your waiting cup.
	www.aabreecoffee.com /Teaposy/teaposy_tea_for_two_teapot.cfm (304 words)

	Emerson Glass Art Co. Products Page
		Fine silver is fumed onto the glass and trapped in the marble to create these elegant flower and vortex marbles.
		View some of our borosilicate glass pendants here or come pick one out at one of our upcoming events.
		Because they are borosilicate glass they can be heated and used as a hot tool and if massage oil is used they can be cleaned up in hot water also.
	www.emersonglass.com (483 words)

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