Glass is a hard, brittle material made by melting together silica sand, soda ash, limestone and other ingredients at high temperatures. It can be formed into different shapes through processes like glassblowing, pressing or drawing and is then annealed to increase its strength. Common types of glass include soda-lime glass for windows and containers, lead crystal for tableware, Pyrex for labware and heat resistance, and optical glass for lenses. Glass fibers are used for insulation, reinforcement and other applications. Modern glass production involves batching raw materials, melting in furnaces, forming the glass, annealing and inspection.
Glass is a non-crystalline, often transparent amorphous solid, that has widespread practical, technological, and decorative use in, for example, window panes, tableware, and optics.Glass is most often formed by rapid cooling of the molten form, some glasses such as volcanic glass are naturally occurring.The most familiar, and historically the oldest, types of manufactured glass are "silicate ..
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Glass, properties, manufacturing, applications, advance techniquesSAAD ARIF
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Glass is an amorphous material giving the highest transparency at all and its applications are globally versatile in almost every field of science from window panes to advance engineered glass, controlling its transparency by some alteration in the structure, making it bullet proof and giving it high strength, also used for green house effect,
THE PRESENTATION WAS MADE UNDER TOPIC GLASS AND ITS TYPE ITS MANUFACTURING PROCESSES AND ITS MARKET SURVEY . WE TRIED TO COVERED ALL THE TYPES WITH THEIR DETAILED INFORMATION .
HOPE U LIKE IT !!!!
This presentation is about float glass it is a type of glass this presentation consist of what is float glass its properties it's manufacturing process and their uses
Glass is a non-crystalline, often transparent amorphous solid, that has widespread practical, technological, and decorative use in, for example, window panes, tableware, and optics.Glass is most often formed by rapid cooling of the molten form, some glasses such as volcanic glass are naturally occurring.The most familiar, and historically the oldest, types of manufactured glass are "silicate ..
different types of glass windows
types of glass for doors
different kind of glass
types of glassware
types of glass finishes
list of types of glass
types of glass shower doors
types of glass vases
Glass, properties, manufacturing, applications, advance techniquesSAAD ARIF
Ā
Glass is an amorphous material giving the highest transparency at all and its applications are globally versatile in almost every field of science from window panes to advance engineered glass, controlling its transparency by some alteration in the structure, making it bullet proof and giving it high strength, also used for green house effect,
THE PRESENTATION WAS MADE UNDER TOPIC GLASS AND ITS TYPE ITS MANUFACTURING PROCESSES AND ITS MARKET SURVEY . WE TRIED TO COVERED ALL THE TYPES WITH THEIR DETAILED INFORMATION .
HOPE U LIKE IT !!!!
This presentation is about float glass it is a type of glass this presentation consist of what is float glass its properties it's manufacturing process and their uses
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It is made from sand(silicone dioxide), soda ash(sodium hydroxide or sodium carbonate), lime, alumina, potassium oxide.
Glass is the most-used cladding material for tall buildings due to its strength, light weight, durability, and wide range of available optical and thermal properties. It has seemingly unlimited optical and aesthetic possibilities.
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2. GLASS a hard, amorphous (non- crystralline)Ā solid material made by melting sand, lime, and varying amounts of calcium oxide and silicon dioxide, at very high temperatures.Ā typicallyĀ brittleĀ and optically transparent.
4. History It started on 3500 BCE inĀ Mesopotamiain theĀ Roman glass makingĀ center atĀ Trier. Comes from a German word āglesumā which means transparent or lustrous substance.
6. Silica(Quartz Sand) It is the main raw material in commercial glass production. Obtained from beds of fine sand or from pulverized sandstone.
7. Soda Ash (sodium carbonateĀ Na2CO3) another main ingredient in manufacture of glass which lowers the glass transition.Ā
8. Lime (calcium oxide(CaO) generally obtained fromĀ limestone, is added to provide for a better chemical durability.Ā
9. Cullet (Recycled glass) Another common glass ingredient coming from waste glass which saves on raw material and energy.
10. Additional Substances Lead ā brilliance and weight Boron ā thermal and electrical resistance Barium ā to increase refractive index Lanthanum oxide ā for optical glasses Iron and cerium ā infrared rays and UV wavelengths Metallic oxides ā to impart color Manganese ā decolorizing Sodium sulfate and sodium chloride ā finishing agents
12. Glass Making Process Modern glass factories are three-part operations: Batch House Hot End Cold End
13. The Batch House handles the raw materials from the storage silos glass batchingĀ is used to determine the correct mix of raw materials (batch) for to achieve the desired glass composition.
14. Batch Diagram Charging of Raw material in to Storage Hoppers: Batching, Mixing and cullet addition Storage for raw materials Storage Hoppers Batching Hoppers Batching and mixing takes place Batched materials are discharged to the furnace Furnace
15. The Hot End handles the main part of manufacture with the furnaces, annealing ovens, and forming machines.
16. Furnace a device used forĀ heating. The name derives fromĀ LatinĀ fornax,Ā oven. The heat energy to fuel a furnace may be supplied directly by fuelĀ combustion, by electricity such as theĀ electric arc furnace. The furnaces operate at temperatures up to 1,575Ā°C.
17. Glass Forming Once glass has been melted, it can be shaped and used in various ways. The Blowing Pressing Drawing.
18. Glassblowing A glass forming technique that involves inflating moltenĀ glassĀ into a bubble, or parison, with the aid of a blowpipe, or blow tube. Air can be blown in manually or by machine
19. Pressing In the pressing method of glass making, the liquid glass is poured into a mold and then pressed into shape by either a machine or a special tool.Ā
20. Glass Drawing is used to make flat and tubular pieces, such as glass for windows and test tubes. To make the glass flat, it is placed into a tank along with melted tin. Tube-shaped glass is poured into a spinning mold
21. Annealing Once the glass is finished, it goes through an annealing or tempering process to increase its strength.
22. AnnealingĀ is a process of slowly coolingĀ glassĀ to relieve internal stresses after it was formed. The process may be carried out in a temperature-controlledĀ kilnĀ known as aĀ Lehr.
23. The Cold End its role is toĀ inspectĀ the products for defects,Ā packageĀ the glass for shipment andĀ labelĀ the glass. Automatic machines, or sometimes persons, inspect every container for a variety of faults.
25. 1. Soda glass it is the cheapest & most common glass. it is prepared by fusing soda ash, sand , limestone. it is also called soft glass soda glass is used for the manufacture of window glass, common glassware, bottles and jars, etc. it is easily attacked by chemcials.
26. 2. Hard glass Toughened glass are best choice for areas where safety is the highest consideration. Used for window panes of automobile, glass roofs, furniture and shelves, partitions etc. It is obtained by fusing potassium carbonate & limestone .
27. 3. Lead crystal glass lead glass has high refractive index. Ordinary glass has a refractive index of n = 1.5, while the addition of lead produces a range up to 1.7 it, therefore, sparkles & is used for making expensive glass ware.
28. 4. Pyrex glass Pyrex was made fromĀ borosilicate glass. It has a high mechanical strength so is less vulnerable to breakage when dropped. it is used in chemical laboratory apparatus, ampoules, pharmaceutical containers, et. in home, it is familiar with oven ware.
29. 5. Optical glass This glass is formulated very precisely so that its properties are knownand specially made so as to be free of strains & defects. it is used for making lenses for spectacles, microscopes, cameras, telescopes & other optical instruments.
30. 6. Laminated glass it is prepared by placing a layer of transparent plastic between the two layers of glass by means of suitable adhesive. The 3 layers are joined together by the action of heat & pressure. . It is used in making wind screens of airplanes, automobiles, bulletproof glass etcā¦
31. 7. Glass fibres: Fiberglass, (also calledĀ fibreglassĀ andĀ glass fibre), is a material consisting of numerous extremely fineĀ fibersĀ ofĀ glass. Glass fibers are useful thermal insulators because of their high ratio of surface area to weight. Glass fibre has varied applications in most of the industries.
32. Glass wool Glass wool is a bundle of loose glass fibres, which is an excellent heat insulator. It is used as insulating material in refrigerators, ovens etc.
33. Other uses of fibreglass electrical insulation pole vaultĀ poles crossbows hockey sticksĀ surfboards boatĀ hulls paper honeycomb for medical purposes in casts.
34. 8. Energy efficient glass Is a high quality clear glass with a specially formulated, permanent, transparent Low E coating applied pyrolitically to one surface during glass manufacture the Low E coating is to reflect the long wavelength energy (generated by heating systems, lighting and building occupants) back into the building
35. Low E glass The radiation coming from your heating system and your furniture and furnishings is long wave radiation. This type of radiation should be contained in your room as best as possible, while the radiation from the sun should be shielded and reflected backĀ outside. Ā
36. 9. Mirrors Mirrors are manufactured by applying aĀ reflective coating such as tin(II) chloride or silverĀ to the glass. TheĀ tin (II) chlorideĀ is applied because silver will not bond with the glass. The chemical activator causes the tin/silver to harden.Ā CopperĀ is added for long-term durability and paintĀ to protect the coating on the back of the mirror from scratches and other accidental damage.
37. DEBATE The status of glass as a liquid, versus a solid, has been hotly debated. The short story is that glass is a supercooled liquid, meaning that it is rigid and static but does not change molecularly between melting and solidification into a desired shape. Glass is one the most versatile substances on Earth, used in many applications and in a wide variety of forms, from plain clear glass to tempered and tinted varieties, and so forth.