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BaCO3 CAS NO 513-77-9 one the main uses of barium carbonate is produce ceramic capacitors
Barium carbonate is a white fine powder.
Barium carbonate (BaCO3), also known as witherite, is a chemical compound
used in rat poison, bricks, ceramic glazes and cement.
Barium carbonate is insoluble in water and soluble in most acids, with the
exception of sulfuric acid. Barium carbonate has a specific gravity of 4.275. Barium
carbonate is toxic by ingestion.
The mineral is named after William Withering, who in 1784 recognized it to be
chemically distinct from barytes. It occurs in veins of lead ore at Hexham in
Northumberland, Alston in Cumbria, Anglezarke, near Chorley in Lancashire and a
few other localities. Witherite is readily altered to barium sulfate by the action of
water containing calcium sulfate in solution and crystals are therefore frequently
encrusted with barytes. It is the chief source of barium salts and is mined in
considerable amounts in Northumberland. It is used for the preparation of rat
poison, in the manufacture of glass and porcelain, and formerly for refining sugar.It
is also used for controlling the chromate to sulfate ratio in chromium electroplating
baths.
| Item | Specification for Frist Grade |
| Purity(BaCO3) | ≥99% |
| Moisture | ≤0.3% |
| SO4 | ≤0.35% |
| Iron(Fe) | ≤0.004% |
| HCL insoluble Matter | ≤0.25% |
(1) Carbonation method: carbon dioxide is passed through barium sulfide
solution to carbonize, the obtained barium carbonate slurry is desulfurization
washed, vacuum filtration, dried at 300℃ and pulverized to obtain barium
carbonate products. its
BaS + CO2 + H2O→ BaCO3↓+ H2S↑
Metathesis method: barium sulfide and ammonium carbonate proceeds metathesis
reaction, and then washing, filtering and drying to obtain bismuth products. its
BaS + (NH4) 2CO3 → BaCO3 ↓ + (NH4) 2S
(2) Carbonization method.
Reaction equation:
BaS + CO2 → BaCO3 ↓ + H2S ↑
Metathesis method. Reaction equation:
BaCl2 + NH4HCO3 + NH4OH → BaCO3 ↓ + 2NH4Cl + H2O
Reaction equation:
BaCO3 + 2NH4Cl → BaCl2 + 2NH3 + H2O + CO2
BaCL2 + (NH4) 2CO3 → BaCO3 ↓ + 2NH4Cl
Barium carbonate is widely used in high-voltage AC capacitors, ultrasonic
transducer devices and piezoelectric ceramic capacitor manufacturing.
The piezoelectric effect was first discovered on quartz crystal by the Curie brothers
in 1880, the crystal which can produce the piezoelectric effect was called
piezoelectric crystal.
This product is toxic virulent. Chronic poisoning mainly accumulates in the
bone, causing bone marrow leukosis. Severe acute poisoning can cause acute
gastrointestinal disorders, tendon reflexes, convulsions, muscle paralysis.
Emergency treatments include gastric lavage, enema, taking measures like
vomiting. Maximum allowable concentration is 0.5 mg/m3. Production should wear
overalls, masks, gloves.
25kg/bag