12024-21-4 Usage
Description
Gallium(III) oxide, also known as gallium trioxide or gallia, is an inorganic compound with the chemical formula Ga2O3. It is an odorless, fine white powder that exists in three crystalline modifications: alpha-, beta-, and gamma-Ga2O3. The alpha-form is analogous to the corundum form of alumina, while the beta-Ga2O3 is isomorphous with theta-alumina. The alpha-form converts to the beta-modification on calcination at high temperatures (600°C), and the gamma form is stable at low temperatures. Gallium(III) oxide has a density of 6.44 g/cm3 (alpha-Ga2O3) and 5.88 g/cm3 (beta-Ga2O3) and melts at 1,725°C. It is soluble in most acids and is used in various applications across different industries.
Uses
1. Used in Spectroscopy:
Gallium(III) oxide is used as a reagent in spectroscopic analysis for the detection and measurement of various elements.
2. Used in Semiconductors:
GALLIUM(III) OXIDE is used as a raw material for the production of gallium arsenide, which is a key component in the manufacturing of semiconductor devices.
3. Used in Gas Sensing:
GALLIUM(III) OXIDE is used as a sensing material in gas sensors due to its high sensitivity to specific gases.
4. Used in Catalysis:
GALLIUM(III) OXIDE is used as a catalyst or catalyst support in various chemical reactions, such as the production of Ga2O3-Al2O3 catalyst.
5. Used in Optoelectronic Devices:
GALLIUM(III) OXIDE is used as a material for creating nanostructures that emit blue and ultraviolet light in optoelectronic device applications.
6. Used in Lasers, Phosphors, and Luminescent Materials:
GALLIUM(III) OXIDE is used as a component in the development of lasers, phosphors, and luminescent materials due to its unique optical properties.
7. Used in Dielectric Coatings for Solar Cells:
GALLIUM(III) OXIDE is used as a material for dielectric coatings in solar cells, enhancing their efficiency and performance.
8. Used in Transparent Conductive Oxides (TCOs):
GALLIUM(III) OXIDE is used as a material for developing deep-ultraviolet TCOs and transparent electrodes for ultraviolet optoelectronic devices.
9. Used in Power Electronic Devices:
GALLIUM(III) OXIDE is used in the development of power electronic devices, such as ultrahigh-voltage power switching applications, due to its electrical and thermal properties.
10. Used in Vacuum Deposition:
GALLIUM(III) OXIDE is used in vacuum deposition processes for the fabrication of thin films with specific properties for various applications.
11. Used in Gadolinium Gallium Garnet Substrates:
GALLIUM(III) OXIDE is used in the manufacture of gadolinium gallium garnet as a substrate in bubble domain memories, which are compact devices with low storage power requirements.
12. Used in the Preparation of Rare Square Pyramidal Gallium:
GALLIUM(III) OXIDE is used as a starting material for the preparation of Sr2CuGaO3S, an example of a rare square pyramidal gallium compound.
Preparation
Gallium sesquioxide 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 sesquioxide 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.
Production Methods
Gallium oxide is formed during the annealing or heating of
semiconductors containing gallium in the microelectronics
industry.
Air & Water Reactions
Insoluble in water.
Reactivity Profile
GALLIUM(III) OXIDE may react with acids. Heating (to 1292° F) with magnesium causes a violent reduction to metallic slate.
Health Hazard
SYMPTOMS: Symptoms of exposure to GALLIUM(III) OXIDE include reduction of red blood cells and platelets, anemia, skin rash and nausea.
Fire Hazard
Flash point data for GALLIUM(III) OXIDE are not available; however, GALLIUM(III) OXIDE is probably combustible.
Check Digit Verification of cas no
The CAS Registry Mumber 12024-21-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,2,0,2 and 4 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 12024-21:
(7*1)+(6*2)+(5*0)+(4*2)+(3*4)+(2*2)+(1*1)=44
44 % 10 = 4
So 12024-21-4 is a valid CAS Registry Number.
InChI:InChI=1/2Ga.3O/rGa2O3/c3-1-5-2-4
