Strontium sulfate (SrSO4)
Strontium sulfate (SrSO4) is the strontium sulfate salt consisting of a sulfur atom at its core, surrounded by two strontium cations and four oxygen atoms, two of which form S=O bonds. Naturally occurring as celestite, strontium sulfate is typically a white crystalline powder. It is insoluble in ethanol and slightly soluble in water and nitric acid. Strontium sulfate primarily serves as a precursor in synthesizing other strontium compounds and is widely used as a ceramic precursor. Due to its unique chemical and physical properties, it also finds applications in pyrotechnics, zinc refining, and ferrite magnet production. BAZARKO supplies strontium sulfate in various grades to meet the needs of multiple industrial applications. The company also provides strontium sulfate with 99% purity and holds internationally recognized certifications, including ISO 9001, ISO 14001, ISO 45001, ISO/IEC 17025, and ISO/IEC 17020.
About BAZARKO
BAZARKO is a well-established and reliable manufacturer and supplier of high-quality strontium sulfate. With access to multiple celestite mines and advanced production facilities, BAZARKO consistently delivers premium strontium sulfate to customers worldwide. The company’s robust logistics network ensures efficient and timely delivery. With decades of experience in the industry, BAZARKO is committed to upholding the highest standards of quality, providing a range of strontium sulfate grades tailored to diverse industrial needs.
What is Strontium Sulfate?
Strontium sulfate (SrSO4) is composed of one strontium ion and one sulfate ion, with a chemical formula of SrSO4. It has a melting point of 1,607°C and a molar mass of 183.68 g/mol. Naturally occurring as celestite, the mineral typically appears as a white crystalline powder. Its solubility in water is very low (1 part in 8,800) and higher in alkaline chloride solutions or dilute acids. The chemical structure, including its monoclinic and orthorhombic crystal forms, provides exceptional stability under normal conditions. Strontium sulfate can also be produced by reacting strontium chloride with sodium sulfate. Its ability to emit bright red colors when burned makes it highly valuable in pyrotechnics, radiography, and ceramic applications.
Different Grades of Strontium Sulfate
BAZARKO offers strontium sulfate in various grades designed for distinct applications. Grading ensures that customers can choose the right purity and specifications for their needs:
Reagent Grade: With a purity of 99.9% or higher, this high-purity grade is ideal for laboratory and pharmaceutical applications. It is used in analytical chemistry and as a reagent for producing other chemicals.
Industrial Grade: Ranging from 98% to 99% purity, this grade is widely applied in ceramics, pyrotechnics, and radiography. Its low solubility and excellent thermal stability make it suitable for large-scale industrial processes.
Technical Grade: Typically between 95% and 98% purity, this grade is used where extremely high purity is not required, such as in building materials, fertilizers, and general ceramic production. Despite lower purity, it maintains important chemical and physical characteristics.
Strontium Sulfate Production Process
The production of strontium sulfate involves several key stages:
Crushing and Grinding: Raw celestite is crushed and milled into fine powder to increase surface area and reactivity.
Reduction: The powder is mixed with coke and heated in a rotary kiln, producing strontium sulfide and carbon monoxide. Careful control of temperature and time ensures high-quality intermediate material.
Oxidation: Strontium sulfide is oxidized with air at high temperature to produce pure strontium sulfate, releasing sulfur dioxide, which is captured and converted into sulfuric acid.
Filtration: The product is filtered to remove impurities and washed to increase purity.
Drying and Milling: The purified strontium sulfate is dried in industrial ovens and milled into fine powder suitable for packaging and shipping.
Applications of Strontium Sulfate
BAZARKO’s strontium sulfate serves multiple industrial purposes:
Ceramics: Used as a fluxing agent, nucleating agent, and for formulating glazes to improve thermal expansion, gloss, and opacity.
Pyrotechnics: Provides bright, long-lasting red flames for fireworks, flares, and other pyrotechnic devices.
Zinc Refining: Facilitates the aggregation of impurities in electrolytic zinc refining, improving zinc quality and reducing energy consumption.
Ferrite Magnets: Enhances magnetic properties, regulates crystal formation, and lowers sintering temperature in magnet production.
Glass Production: Contributes to improving transparency, thermal resistance, and mechanical strength of specialty glass.
Other Strontium Compounds: Acts as a precursor for strontium carbonate, strontium nitrate, and strontium hydroxide, applied in ceramics, pyrotechnics, and zinc processing.
About BAZARKO’s Strontium Sulfate
BAZARKO is a leading producer of high-purity strontium sulfate with decades of experience in extraction and manufacturing. The company offers products in multiple grades, including 80%, 85%, and 99% purity, all processed in advanced facilities. BAZARKO’s comprehensive supply chain and global logistics ensure reliable delivery to clients worldwide. The company holds international standards certification (ISO 9001, ISO 14001, ISO 45001, ISO/IEC 17025, ISO/IEC 17020) guaranteeing product quality, consistency, and safety.
Conclusion
Strontium sulfate (SrSO4) is a versatile inorganic material used in ceramics, pyrotechnics, ferrite magnet production, glass manufacturing, and zinc refining. Its low solubility, high melting point (1,610°C), and chemical stability make it ideal as a precursor for other strontium compounds. BAZARKO provides strontium sulfate in multiple grades, including 99% purity, to meet diverse industrial needs. Certified with international ISO standards, BAZARKO’s strontium sulfate ensures reliability, high quality, and global availability for various applications, from laboratory research to large-scale industrial production.
