SPECIALTY ALUMINAS FOR POLISHING APPLICATIONS

2019S P E C I A LT Y A L U M I N A S F O RPOLISHING APPLICATIONSwww.alteo-alumina.com

TECHNICAL FEATURESPOLISHINGPolishing is a multi-stage process that aims to improve the surface condition of any object.These stages are: Pre-polish Polish FinishingDuring each polishing step two sequential actions take place: Stock removal Buffing or LappingDuring stock removal, alumina agglomerates break down into primary crystals that continue the “smoothing” or buffing action.The polishing behavior of an alumina is measured and expressed by two key characteristics: Cut (the ability to remove stock) Polish ( the ability for buffing/lapping)The calcination degree determines the primary crystal size and therefore the stock removal capability of an alumina.Large primary crystals will give more abrasion. A coarse alumina grade will generate higher stock removal comparedto a finer grade, but agglomerate toughness is dominant.ALTEO has developed a wide range of tailor-made polishing grade aluminas, taking advantage of its unique range ofspecialty alumina feedstock and access to the required processing technologies.POLISHING ALUMINASProduct rangeOur polishing aluminas can be applied in all of the usual ways: In solid compounds In liquid compounds As dry powder In suspension – slurrySEGMENTSteel, Stainless SteelChromeBrassNon-ferrous MetalsPrecious arnishesCleaners AutomativeRubbing compoundsVery softSoftAll of our grades meet key customer requirements: Well defined topcut Stable PSD Consistent product quality Contamination freePRODUCTMediumMedium hardHard

VERY SOFTAGGLOMERATESType:Very fine and low calcined grades.Properties:Low to very low cut and very high polish effect.Technical interest:Used to give a high gloss.Applications:Steel & stainless steel, precious metals, stones, plastics, wood, glass,electronics, varnishes, cleaners, automotive rubbing compounds.UnitParticule Size D50 (Sedigraph)µmParticule Size D90 (Sedigraph)µmScreen 53.56.5 45µm 0.1% 45µm 0.3% 45µm 0% 45µm 0%16181444267275% 85 93 99 25Primary crystalµm0.45 0.51.7 0.1Na2O totalOil absorption (oleic acid)Specific Surface Area B.E.T. m /gAlpha Alumina 9Typical dataA4G10A4G20A4BS

SOFTAGGLOMERATESAR12TAAR12B25 AR12B15AR12B10AR12B5AR12BFM AR75B10Unitµm552515105.53.510Particule Size D90 (Cilas)µm105604025151045Screen residue%Particule Size D50 (Cilas) 200µm 0% 90µm 2% 90µm 0.2% 75µm 0.1% 45µm 0.2% 20µm 0.1% 45µm 0.1%ml/100g484442403938482Specific Surface Area B.E.T. m /g1212121212.51375Alpha Alumina contentOil absorption (oleic acid)% 75 75 75 75 75 75 25Primary crystalµm 0.5 0.5 0.5 0.5 0.5 0.5 0.1Na2O olish-8888.5996Typical dataAR12TAAR12B15Type:Low calcined grades.Properties:Low cut and high polish effect.Technical interest:Used to give a high gloss.Applications:Steel & stainless steel, chrome,brass, non-ferrous metals, preciousmetals, stones, plastics, glass,electronics, varnishes, cleaners,automotive rubbing compounds.AR12B5MEDIUM AGGLOMERATESAR308TAAR4TAAR4B25AR4B15Type:Calcined aluminas with an alpha content of 90%.AR4B5UnitParticule Size D50 (Cilas)µm559025155Particule Size D90 (Cilas)µm105150855015Screen residue%ml/100g485040403585555.5% 85 93 93 93 93Primary crystalµm 0.5 0.5 0.5 0.5 0.5Na2O 445Oil absorption (oleic acid)Specific Surface Area B.E.T. m2/gAlpha Alumina contentTechnical interest:Mainly used for polishing and finishing when bothtreatments are required. 200µm 0% 200µm 0% 90µm 10% 63µm 5% 45µm 0.3%Applications:Steel & stainless steel, brass, non-ferrousmetals, aluminium.Typical dataAR308TAAR4SBAR4B5

MEDIUM e Size D50 (Cilas)µmParticule Size D90 (Cilas)µmScreen residue%Oil absorption (oleic acid) 45µm 2.5% 45µm 1.5% 45µm 0.5% 45µm 0.1% 200µm 0%ml/100g17161617505020 63µm 1% 45µm 1%3426Specific Surface Area B.E.T. m2/g0.80.91.01.21.11.21.3Alpha Alumina content 97 97 97 97 99 99 99%Primary crystalµm2.52.52.52.61.51.51.5Na2O ish-344576.57Type:Calcined aluminas with a highalpha content.Technical interest:These grades are used forpolishing and finishing whenboth treatments are required.Applications:Steel & stainlesschrome, aluminiumsteel,Typical dataAC34B3AC44B6AC12B5AC12TAHARD AGGLOMERATESAC45TAUnitAC45FAC35TAAC35B5Particule Size D50 (Cilas)µm5565705.5Particule Size D90 (Cilas)µm10011013512Screen residue%ml/100g 200µm 0% 200µm 0% 200µm 0% 45µm 0.01%46504820Specific Surface Area B.E.T. m2/g0.60.50.50.7Alpha Alumina content 97 97 97 97Oil absorption (oleic acid)%Primary crystalµm2.52.92.82.8Na2O ined aluminas with a high alpha content.Technical interest:Mainly used for pre-polishing. These grades areused for polishing when both treatments arerequired.Applications:Steel & stainless steel, chrome.Typical dataAC45TAAC45FAC35B5

ALTEO R&DFor Alteo, innovation and application R&D are majorparts of its growth strategy.Alteo enhances its R&D capabilities through itsapplication laboratory: the installation of stateof-the-art equipment, the recruitment of technicalexperts and collaborations with key partners anduniversity laboratories.Alteo constantly strives for the best specialtyalumina-based solution to your polishing ambitions.Contact our R&D team now atwww.alteo-alumina.com/contactCUSTOMER CARE COMMITMENTTo meet your highest expectations, our Customer Careteam will always strive to ensure a first class service.Our commitment is to provide full support from yourfirst call to the delivery of our products; with technicalassistance, packing solutions and short lead times.ALTEO AT A GLANCE A world leading fully-integrated supplier of specialtyaluminas with a capacity of more than 600 000tonnes of alumina based products (hydrates andcalcined aluminas). Global sales network with 4 regional hubs, 17offices and local warehouses around the world. Development centre in France. Leading raw material supplier to the followingindustrial markets: Ceramics, Refractories, SpecialtyGlass, Polishing, Flame Retardants, Fillers and Coatings.www.alteo-alumina.com

Calcined aluminas with a high alpha content. Technical interest: Mainly used for pre-polishing. These grades are used for polishing when both treatments are required. . A world leading fully-integrated supplier of specialty Global sales network with 4 regional hubs, 17 offices and local warehouses around the world.