| Identification | More | [Name]
GALLIUM(III) OXIDE | [CAS]
12024-21-4 | [Synonyms]
GALLIUM(+3)OXIDE
GALLIUM(III) OXIDE
GALLIUM OXIDE
GALLIUM SESQUIOXIDE
Digallium trioxide
digalliumtrioxide
Ga2-O3
Gallia
Gallium oxide (Ga2O3)
Gallium trioxide
galliumoxide(ga2o3)
galliumtrioxide
Gallium(III) oxide (99.999% Ga) PURATREM
Galliumoxidewhitepowder
GALLIUM(III) OXIDE 99.999+%
Gallium(III) oxide, 99.99+% metals basis
Gallium(III) oxide, 99.99+%
GALLIUM OXIDE, 99.999%
Gallium(III)oxide(99.998%-Ga)PURATREM
gallium(iii) oxide, puratronic | [EINECS(EC#)]
234-691-7 | [Molecular Formula]
Ga2O3 | [MDL Number]
MFCD00011020 | [Molecular Weight]
187.44 | [MOL File]
12024-21-4.mol |
| Chemical Properties | Back Directory | [Appearance]
white odourless powder | [Melting point ]
1740 °C
| [density ]
6.44 g/mL at 25 °C
| [refractive index ]
1.92 | [storage temp. ]
Sealed in dry,Room Temperature | [solubility ]
soluble in hot acid solutions | [form ]
Powder or Lump | [color ]
White | [Specific Gravity]
6.44 | [Stability:]
Stable. Incompatible with magnesium. | [Water Solubility ]
Soluble in acids. Insoluble in water | [Crystal Structure]
Corundum type | [crystal system]
Three sides | [Merck ]
14,4346 | [Space group]
R3c | [Lattice constant]
| a/nm | b/nm | c/nm | α/o | β/o | γ/o | V/nm3 | | 0.49825 | 0.49825 | 1.3433 | 90 | 90 | 120 | 0.2888 |
| [InChIKey]
QZQVBEXLDFYHSR-UHFFFAOYSA-N | [CAS DataBase Reference]
12024-21-4(CAS DataBase Reference) | [EPA Substance Registry System]
Gallium trioxide (12024-21-4) |
| Safety Data | Back Directory | [Safety Statements ]
S24/25:Avoid contact with skin and eyes . | [WGK Germany ]
2
| [RTECS ]
LW9650000
| [TSCA ]
Yes | [HS Code ]
28259090 | [Toxicity]
mammal (species unspecified),LDLo,intraperitoneal,10gm/kg (10000mg/kg),BEHAVIORAL: EXCITEMENTLUNGS, THORAX, OR RESPIRATION: RESPIRATORY DEPRESSIONBEHAVIORAL: ATAXIA,Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. Vol. 31(6), Pg. 58, 1987. |
| Hazard Information | Back Directory | [General Description]
Odorless fine white powder. Insoluble in water. | [Reactivity Profile]
GALLIUM OXIDE(12024-21-4) may react with acids. Heating (to 1292° F) with magnesium causes a violent reduction to metallic slate. | [Air & Water Reactions]
Insoluble in water. | [Health Hazard]
SYMPTOMS: Symptoms of exposure to this compound include reduction of red blood cells and platelets, anemia, skin rash and nausea. | [Fire Hazard]
Flash point data for this chemical are not available; however, GALLIUM OXIDE is probably combustible. | [Description]
Gallium(III) oxide (Ga2O3) is a wide band gap semiconductor that belongs to a family of transparent semiconducting oxides (TSO). It can form different polymorphs such as α-,β-, γ-, δ-, and ε-. Polycrystalline and nanocrystalline Ga2O3 can be prepared using several methods such as chemical vapor deposition, thermal vaporization, and sublimation, molecular beam epitaxy, melt growth, etc. It is widely used as a functional material in various applications including optoelectronics, chemical sensors, catalysis, semiconductor devices, field-effect transistors, and many others.
| [Chemical Properties]
white odourless powder | [Uses]
Gallium(III) oxide is used in vacuum deposition. It is useful for making semiconductor devices, gallium-alumina catalyst, gas sensors, luminescent phosphors and dielectric coatings of solar cells. It shows potential for developing deep-ultraviolet TCOs (Transparent Conductive Oxides) and transparent electrodes for ultraviolet optoelectronic devices. Recent studies report that gallium oxide can be a strong contender for power electronic devices for example, in ultrahigh-voltage power switching applications. Films made of gallium oxide have gained commercial interest owing to their gas sensitive characteristics, and glasses made with gallium oxide are the preferred optical materials for use in advanced technologies. | [Uses]
In semiconductors; gas sensing; catalysis. Nanostructures as blue and UV light emitters in optoelectronic device applications.
Gallium(III) oxide has been reported in applications in lasers, phosphors, and luminescent materials. Monoclinic ß-Ga2O3 is used in gas sensors and luminescent phosphors and can be applied to dielectric coatings for solar cells. This stable oxide has also shown potential for deep-ultraviolet transparent conductive oxides, and transistor applications. Thin Ga2O3 films are of commercial interest as gas sensitive materials. ß-Gallium(III) oxide is used in the production of Ga2O3-Al2O3 catalyst. | [Application]
Gallium(III) oxide is widely used as a host material for the fabrication of electroluminescent devices. For example, europium-doped Ga2O3 thin films can be used as a light-emitting layer to fabricate an optically transparent electroluminescent device.
Due to its distinct optical and electrical properties like moderate conductivity and high laser damage threshold, Ga2O3 can be used in laser-driven electron accelerators, low-loss plasmonics, and Si-based dielectric laser accelerators.
It can also be used as an effective catalyst for the dehydrogenation of propane to propene.
Starting material for the preparation of Sr2CuGaO3S, an example of a rare square pyramidal gallium.
Gallium(III) oxide is used in spectroscopic analysis and in preparing gallium arsenide for making semiconductors. | [Production Methods]
Gallium oxide is formed during the annealing or heating of
semiconductors containing gallium in the microelectronics
industry. | [References]
Highly selective and rapid enrichment of phosphorylated peptides using gallium oxide‐coated magnetic microspheres for MALDI‐TOF‐MS and nano‐LC‐ESI‐MS/MS/MS analysis DOI:10.1002/PMIC.200700454
Development of gallium oxide power devices (Phys. Status Solidi A 1∕2014) DOI:10.1002/PSSA.201470201
Synthesis and characterization of morphologically different high purity gallium oxide nanopowders DOI:10.1007/S10853-007-1869-2
Structure, Morphology, and Optical Properties of Amorphous and Nanocrystalline Gallium Oxide Thin Films DOI:10.1021/JP311300E
Electrical and optical properties of deep ultraviolet transparent conductive Ga2O3/ITO films by magnetron sputtering DOI:10.1088/1674-4926/31/10/103001
Patty's Toxicology, 6 Volume Set, 6th Edition |
| Questions And Answer | Back Directory | [Physical properties]
White crystals; exists in three crystalline modifications: alpha-, beta-, and gamma-Ga2O3; while the alpha-form is analogous to the corundum form of alumina, the beta-Ga2O3 is isomorphous with theta-alumina; alpha-form converts to beta-modification on calcination at high temperatures (600°C); gamma form is stable at low temperatures; density 6.44 g/cm3 (alpha-Ga2O3), 5.88 g/cm3 (betaGa2O3); melts at 1,725°C; soluble in most acids.
Gallium(III) oxide is used in the manufacture of gadolinium gallium garnet as a substrate in bubble domain memories; these are compact devices not requiring the storage power demanded by other memory devices. Gallium(III) oxide is starting material for the preparation of Sr2CuGaO3S, an example of a rare square pyramidal gallium.
| [Preparation]
Gallium(III) oxide is precipitated in hydrated form upon neutralization of acidic or basic solution of gallium salt. Also, it is prepared by thermal decomposition of gallium salts. Gallium oxide hydroxide, GaOOH [20665-525] on calcinations at high temperatures yields betaGa2O3. | [Reactions]
Gallium(III) oxide is reduced to gallium suboxide, Ga2O [12024-20-3] by common reducing agents. Also, heating the sesquioxide with gallium metal yields gallium suboxide. Heating with magnesium reduces the oxide to elemental form in a violent reaction:
Ga2O3 + 3Mg →2Ga + 3MgO
Heating with mineral acids yields corresponding gallium salts. When heated with a mixture of hydrogen and arsenic vapors at 600°C, gallium arsenide, GaAs is produced. When heated with alkali metal oxide at 1,000°C, alkali metal gallates, such as K2Ga2O6 are formed. |
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