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Aluminum Oxide (Al2O3) Powder

Aluminum Oxide High Pure Powder (High Pure Alumina Powder)

Purity---99.99% Shape---300mesh

Aluminum Oxide Ultra /Supper High Pure Powder
(Ultra / Supper High Pure Alumina Powder)

Purity---99.999% D50--- 10-15um Bet---4-5 m2/g
App--- alumina ultra high pure micron powder are mainly used for raw of crystal, artificial lens、raw materials for PDP and other high performance material.

Alumina Thermal Spraying Powder (Alumina Powder)

Purity--->99.99% Shape---300mesh

Aluminum Oxide Nanometer Powder (Al2O3 Nano-powder )  

Content of zirconia (%)--- 99.9     Appearance --- White powder     

Average grain size (nm) --- 20        Specific surface area (m2/g) --- ≥25

Loss of weight in drying (%) --- ≤2      Loss of weight in burning (%) --- ≤0.3

Crystal pattern --- Monoclinic


Appearance ---White powder

Content of zirconia (%) --- 99.8      Appearance --- White powder     

Average grain size (nm) --- 40     Specific surface area (m2/g ) --- ≥20

Loss of weight in drying (%) --- ≤2

Loss of weight in burning (%) ---≤0.3 


Application ---Being a stable oxide with small grain size, nanozirconia has the properties of acid resistance, alkali resistance, corrosion resistance and high-temperature resistance. It can be used in functional ceramics, structural ceramics and jewel material and its properties are greatly improved as compared with the micro-zirconia. Nanometer Al2O3 powder primary used below

(1) Functional ceramics, ceramic pigment, high-purity pigment, porce lain glaze.
(2) Pyrooptical element, oxygen-sensitive element, high-capacity capacitor, optical storage, image display element, light modulated element, light shutter, stereotelevision glasses, image storage and display element.
(3) Abrasive material, insulating material, fire-retarding material, roentgenograply.
(4) High-temperature and corrosion resisting components, bearing nozzle, smelting crucible.
(5) Piezoelectric element, ion exchanger, solid dielectric, filter, temperature and pressure transmitters and transmitting elements, electrode used for magnetic-current generator, heating element.
(6) Single crystal, ruby,  sapphire, artificial jewel, catalyzer,  catalysing carrier, analyse reagent
(7) Fuel, battery.

(8)Thermal Spraying Coating material

Our Advantage

aluminum oxide powderChina rare metal material co.,limited (CRM) is an experter in manufacture Aluminum Oxide powder as evaporation material . All Aluminum Oxide powder are manufacture by programs with  with the highest possible density and smallest possible average grain size.. 

CRM material co.,limited is specialized in making virous powder. We have many raw material compounds line, such as semiconductor line, chemical compounds line, metallurgy line, powder milling line, etc. Moreover, we introduced many advanced technology and equipments from related companies at home and aborad. We also have an experienced research team who have developed many new and special pellets, and also successfully made many trial orders and received many customers satisfaction and long-term friendship. 

All aluminum Oxide powder are analyzed using best detection means including chemical analysis, Crystal phase microscope, x ray diffraction(XRD), X-Ray Fluorescence (XRF), Glow Discharge Mass Spectrometry (GDMS), and Inductively Coupled Plasma (ICP).

Aluminium Oxide Base Information

Amphoteric nature: Aluminium oxide is an amphoteric substance, meaning it can react with both acids and bases, such as hydrofluoric acid and sodium hydroxide, acting as an acid with a base and a base with an acid, neutralising the other and producing a salt.

Al2O3 + 6 HF → 2 AlF3 + 3 H2O
Al2O3 + 2 NaOH + 3 H2O → 2 NaAl(OH)4 (sodium aluminate)

Structure: Corundum from Brazil, size about 2×3 cm.
The most common form of crystalline aluminium oxide is known as corundum, which is the thermodynamically stable form.The oxygen ions nearly form a hexagonal close-packed structure with aluminium ions filling two-thirds of the octahedral interstices. Each Al3+ center is octahedral. In terms of its crystallography, corundum adopts a trigonal Bravais lattice with a space group of R-3c (number 167 in the International Tables). The primitive cell contains two formula units of aluminium oxide.

Aluminium oxide also exists in other phases, including the cubic γ and η phases, the monoclinic θ phase, the hexagonal χ phase, the orthorhombic κ phase and the δ phase that can be tetragonal or orthorhombic. Each has a unique crystal structure and properties. Cubic γ-Al2O3 has important technical applications. The so-called β-Al2O3 proved to be NaAl11O17.

Molten aluminium oxide near the melting temperature is roughly 2/3 tetrahedral (i.e. 2/3 of the Al are surrounded by 4 oxygen neighbors), and 1/3 5-coordinated, very little (<5%) octahedral Al-O is present. Around 80% of the oxygen atoms are shared among three or more Al-O polyhedra, and the majority of inter-polyhedral connections are corner-sharing, with the remaining 10–20% being edge-sharing. The breakdown of octahedra upon melting is accompanied by a relatively large volume increase (~20%), the density of the liquid close to its melting point is 2.93 g/cm3.

Use: electric ceramic, adsorbent, refractory material, catalyst, GC analysis component, filler,glass, catalysis, purification, abrasive, paint, composite fiber, abrasion protection.

CAS Number: 1344-28-1
ChemSpider: 8164808
ECHA InfoCard:100.014.265
PubChem: 9989226
RTECS number: BD120000
UNII: LMI26O6933

Chemical formula: Al2O3
Molar mass: 101.96 g·mol−1
Appearance: white solid
Odor: odorless
Density: 3.95–4.1 g/cm3
Melting point: 2,072 °C (3,762 °F; 2,345 K)
Boiling point: 2,977 °C (5,391 °F; 3,250 K)

Solubility in water : insoluble
Solubility: insoluble in diethyl ether practically insoluble in ethanol
Thermal conductivity: 30 W·m−1·K−1
Refractive index (nD): nω=1.768–1.772,nε=1.760–1.763, Birefringence 0.008
Crystal structure: Trigonal, hR30, space group = R3c, No. 167
Lattice constant: a = 478.5 pm, c = 1299.1 pm
Coordination geometry: octahedral

Std molar entropy (So298): 50.92 J·mol−1·K−1
Std enthalpy of formation (ΔfHo298): −1675.7 kJ·mol−1

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