{"id":6620,"date":"2021-04-04T12:32:53","date_gmt":"2021-04-04T12:32:53","guid":{"rendered":"https:\/\/www.aluminaceramicball.com\/?p=6620"},"modified":"2021-04-12T06:48:56","modified_gmt":"2021-04-12T06:48:56","slug":"gedetailleerde-uitleg-van-de-parameters-van-aluminiumoxidepoeder","status":"publish","type":"post","link":"https:\/\/www.aluminaceramicball.com\/nl\/gedetailleerde-uitleg-van-de-parameters-van-aluminiumoxidepoeder\/","title":{"rendered":"Gedetailleerde uitleg van de parameters van aluminiumoxidepoeder"},"content":{"rendered":"

Op dit moment is 's werelds aluminiumoxidepoeder<\/a> geproduceerd door Bayer proces is goed voor meer dan 90% van de totale productie, waarvan de meeste worden gebruikt om metaal aluminium te maken, en minder dan 10% worden gebruikt voor andere doeleinden.<\/p>\n

Aluminiumoxide poeder<\/a> is aluminiumoxide, chemisch symbool: Al2O3, molecuulgewicht 102, zuiver aluminiumoxide is wit amorf poeder, algemeen bekend als bauxiet, dichtheid 3,9-4.0g\/cm3, smeltpunt 2050 \u2103, kookpunt 2980 \u2103, onoplosbaar in water, amfotere Oxide, oplosbaar in anorganisch zuur en alkalische oplossing, er zijn vier allotropen \u03b2-aluminiumoxide \u03b4-aluminiumoxide v-aluminiumoxide a-aluminiumoxide, en er zijn voornamelijk twee varianten van \u03b1 type en \u03b3 type , Industrieel kan worden gewonnen uit bauxiet.<\/p>\n

In het kristalrooster van \u03b1-type aluminiumoxide zijn zuurstofionen dicht opeengepakt in zeshoeken en is Al3+ symmetrisch verdeeld in het octahedrale co\u00f6rdinatiecentrum omgeven door zuurstofionen. De rooster energie is groot, dus het smeltpunt en kookpunt zijn hoog. \u03b1-type aluminiumoxide is onoplosbaar in water en zuur. In de industrie wordt het ook wel aluminiumoxide genoemd. Het is de basisgrondstof voor het maken van aluminiummetaal. Het wordt ook gebruikt om verschillende vuurvaste stenen, vuurvaste smeltkroezen, vuurvaste buizen en testinstrumenten voor hoge temperaturen te maken; het kan ook worden gebruikt als schuurmiddel, vlamvertragers, vulstoffen, enz.; hoogzuiver \u03b1-type aluminiumoxide is ook de grondstof voor de productie van kunstmatig korund, kunstmatige robijn en saffier; het wordt ook gebruikt voor de productie van moderne ge\u00efntegreerde schakelingen op grote schaal.<\/p>\n

Aluminiumoxide van het \u03b3-type wordt geproduceerd door dehydratie van aluminiumhydroxide bij een lage temperatuur van 140-150 \u00b0C. Het wordt in de industrie ook wel geactiveerd aluminiumoxide en aluminiumlijm genoemd. In de structuur zijn zuurstofionen ongeveer dicht opeengepakt in verticale vlakken en is Al3+ onregelmatig verdeeld in de octahedral en tetrahedral holtes omgeven door zuurstofionen. \u03b3-type aluminiumoxide is onoplosbaar in water, maar kan worden opgelost in sterk zuur of sterke alkali-oplossing. Als het wordt verhit tot 1200\u2103, wordt het volledig omgezet in \u03b1-type aluminiumoxide. Aluminiumoxide van het \u03b1-type is een poreus materiaal, met een inwendig oppervlak tot enkele honderden vierkante meters per gram, met een hoge activiteit en sterke adsorptiecapaciteit. Industri\u00eble producten zijn vaak kleurloze of lichtroze cilindrische deeltjes met een goede drukbestendigheid. Het wordt algemeen gebruikt als adsorbens, katalysator en katalysatordrager in de aardolieraffinage en petrochemische industrie; het wordt gebruikt als ontzuringsmiddel voor transformatorolie en turbineolie in de industrie; het wordt ook gebruikt voor chromatografische analyse; in het laboratorium is het een neutraal, sterk droogmiddel De droogcapaciteit is niet minder dan die van fosforpentoxide. Na gebruik kan het geregenereerd en hergebruikt worden na 6-8 uur verwarmen bij 175\u00b0C.<\/p>","protected":false},"excerpt":{"rendered":"

At present, the world’s alumina powder produced by Bayer process accounts for more than 90% of the total output, most of which are used to make metal aluminum, and less than 10% are used for other purposes. Alumina powder is alumina, chemical symbol: Al2O3, molecular weight 102, pure alumina is white amorphous powder, commonly known 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