Barium zirconate Chemical Properties

Melting point:

2500°C

Density 

5.52 g/mL at 25 °C (lit.)

solubility 

insoluble in H2O, alkaline solutions; slightly soluble in acid solutions

form 

powder

color 

Off-white

Specific Gravity

5.52

Appearance

Fine, white powder

Water Solubility 

Insoluble in water.

Exposure limits

ACGIH: TWA 5 mg/m3; STEL 10 mg/m3
NIOSH: IDLH 25 mg/m3; TWA 5 mg/m3; STEL 10 mg/m3

InChI

InChI=1S/Ba.3O.Zr/q+2;;2*-1;

InChIKey

DQBAOWPVHRWLJC-UHFFFAOYSA-N

SMILES

[Zr]([O-])([O-])=O.[Ba+2]

CAS DataBase Reference

12009-21-1(CAS DataBase Reference)

EPA Substance Registry System

Barium zirconium oxide (BaZrO3) (12009-21-1)

Safety Information

Hazard Codes 

Xn

Risk Statements 

20/22

Safety Statements 

28

WGK Germany 

1

RTECS 

CR0875000

TSCA 

TSCA listed

Toxicity

LD50 orl-rat: 1980 mg/kg AIHAAP 24,131,63

MSDS

• Language:English Provider:SigmaAldrich
• Language:English Provider:ALFA

Barium zirconate Usage And Synthesis

Chemical Properties

Barium zirconate (BaZrO₃) is a light gray-buff powder. It is insoluble in water and alkalis, and slightly soluble in acids. It is used in the manufacture of white, easily colored silicone rubber compounds that exhibit good heat stability at temperatures up to 500 °F (approximately 260 °C), as well as in electronics applications.

Uses

Barium zirconium oxide is involved in the preparation of its nano powder, which finds application in the gas sensing performance of thick films especially with ammonia gas. Copper(II) oxide doping with yttrium-doped barium zirconate is used as an electrolyte in solid oxide fuel cell.

Application

Barium zirconate proton exchange membrane fuel cells and electrolyzer cells exhibit outstanding electrochemical performance and stability. They demonstrate high Faraday efficiency and exceptional stability within a temperature range of 450 to 600 degrees Celsius, under water vapor partial pressures of 0.5 to 0.7 atmospheres, and at high electrolyzer current densities of 0.5 to 2.0 amperes per square centimeter. These properties confer significant advantages over conventional barium cerate electrolytes.

Flammability and Explosibility

Not classified

reaction suitability

reagent type: catalyst
core: zirconium

Safety Profile

Moderately toxic by ingestion and intraperitoneal routes. Inhalation produces interstitial pneumonitis. See also ZIRCONIUM COMPOUNDS and BARIUM COMPOUNDS.

References

[1] WEI TANG. Sintering protonic zirconate cells with enhanced electrolysis stability and Faradaic efficiency[J]. Nature synthesis, 2025, 4 5: 592-602. DOI:10.1038/s44160-025-00765-z. 
[2] PETER BABILO   S. H  T Uda. Processing of yttrium-doped barium zirconate for high proton conductivity[J]. International Journal of Materials Research, 2007, 6 1: 1322-1330. DOI:10.1557/JMR.2007.0163. 
[3] DR. DONGLIN HAN. Detrimental Effect of Sintering Additives on Conducting Ceramics: Yttrium-Doped Barium Zirconate[J]. ChemSusChem, 2018, 11 23: 4102-4113. DOI:10.1002/cssc.201801837.
[4] YOSHIHIRO YAMAZAKI   Sossina M H  Raul Hernandez Sanchez. High Total Proton Conductivity in Large-Grained Yttrium-Doped Barium Zirconate[J]. Chemistry of Materials, 2009, 21 13: 2755-2762. DOI:10.1021/cm900208w.

Barium zirconate(12009-21-1)Related Product Information

• Barium stearate
• Hexafluorozirconic acid
• Calcium zirconate
• Barium naphthenate
• Barium sulfate
• Ammonium hexafluorozirconate
• Barium
• Barium molybdate
• LITHIUM ZIRCONATE
• Zinc zirconate
• STRONTIUM ZIRCONATE
• MAGNESIUM ZIRCONATE
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• BARIUM HYDRIDE
• Zirconium
• ZIRCONIUM HYDRIDE
• Barium zirconate
• BARIUM ZIRCONATE TITANATE