Bismuth Trioxide (Bi2O3) 1304-76-3

Bismuth Trioxide

Nickname: Bismuth Oxide

【Cas】1304-76-3 

 Bismuth Trioxide Properties

Bi2O3 Molecular Weight: 465.96; Yellow crystal powder of monoclinic crystal system; Relative weight: 8.9; Boiling point: 1,900℃. Melting point: 820℃. Dissolvable in acid; unable to dissolve in water or soda. Except for this, reports about Bi2O, BiO, Bi2O,2.7～2.8, Bi2O4, Bi3O5 and Bi2O6 are all unconfirmed as pure mortgages.

High Purity Bismuth Trioxide Specification

Packing: Blik drum(25kg),or paper bag.

What is Bismuth oxide (Bi2O3) used for?

Bismuth oxide(Bi₂O₃)is the most commercially important and widely used bismuth oxide. As an environmentally friendly functional material with exceptional performance, its unique optical, electrical, and chemical properties make it an indispensable key building block for modern high-end manufacturing and technological innovation.

Core application areas

1. Electronic ceramics and electrical devices

As a core functional additive, bismuth oxide is a key material for manufacturing various advanced electronic components.

- Dielectric capacitors: Ceramic dielectric capacitors used to manufacture high dielectric constant capacitors are fundamental components in consumer electronics, communication equipment and other fields.

- Piezoelectric and varistor ceramics: Used to prepare piezoelectric ceramics (sensors, transducers) and zinc oxide varistors (circuit protection), with stable and reliable performance.

- Low-temperature co-fired ceramics (LTCC): As an excellent sintering aid, it effectively reduces the sintering temperature and is widely used in microelectronic packaging and multilayer devices.

2. Ceramic glazes and special glass

Bismuth oxide is the preferred material for achieving high-quality surface treatment and optical performance.

- Environmentally friendly lead-free glaze: As an ideal substitute for lead oxide, it is used to prepare environmentally friendly ceramic glazes, giving the products excellent whiteness, glossiness and coloring effects.

- Optical glass: It is a key component of certain types of optical glass and nuclear radiation protection glass, with high refractive index and shielding properties.

3. Polymer composite materials and flame retardant applications

Bismuth oxide provides an efficient and environmentally friendly functionalization solution for polymer products.

- Flame retardancy and smoke suppression: As a highly efficient flame retardant, it is widely used in rubber, plastics, coatings and inks, significantly improving the fire safety level of materials and effectively reducing smoke generation.

- Specialty paper: Used to manufacture special materials such as fire-retardant paper and flame-retardant fibers, suitable for high-end electrical insulation and fire safety fields.

4. Chemical synthesis and pharmaceutical precursors

Bismuth oxide is a fundamental raw material for the synthesis of high-value bismuth compounds, and its position in the industrial chain is crucial.

- Bismuth salt synthesis: As a precursor, it is used to prepare various bismuth salts such as bismuth nitrate and bismuth citrate.

- Pharmaceutical industry: These bismuth salts are important raw materials for the preparation of gastrointestinal drugs (such as potassium bismuth citrate) and external use medicines.

5. Modern analysis and testing

Bismuth oxide plays a key role in precision analysis techniques.

- Fire assay: It has become the core component of flux used in mineral analysis for precious metal analysis (such as gold and silver), which can efficiently capture and enrich precious metal elements and ensure the accuracy of analysis.

- Chemical reagents: As high-purity chemical reagents, they are used for laboratory analysis and quantitative detection.