bulk Calcium tungstate Powder Manufacturer | Ausreson

CAS: 7790-75-2

MF: CaO4W

MW: 287.92

EINECS: 232-219-4

Specification: 99% min Calcium tungstate Powder

Sample: Calcium tungstate Powder

Packaging: 1kg/bag, 25kg/drum

Brand: Ausreson

MOQ: 1 kg

Appearance: White powder

Storage: Cool Dry Place

Shelf Life: 2 Years

Test Method: HPLC

Last updated: March 2026

Calcium tungstate Powder Usage and Synthesis.

Calcium tungstate is an important chemical substance with a wide range of applications.

Firstly, compared with rare-earth phosphors, calcium tungstate can reduce the time a patient is exposed to X-rays, improve the resolution of X-rays, extend the life of X-ray tubes and reduce energy consumption.

Secondly, calcium tungstate can be used to produce lithium niobate single crystals and can be used at high temperatures of 1850°C.

In addition, common tungstates include sodium tungstate, cobalt tungstate and cadmium tungstate, in addition to bismuth tungstate, which are widely used in the fields of chemical industry and optoelectronics due to their good physical and chemical properties.

In conclusion, calcium tungstate has important applications in medical, chemical, electronic and electrical industries.

Uses and Function of Calcium tungstate.

Calcium tungstate is an important chemical raw material, mainly used in the production of tungsten products such as ammonium sec-tungstate, tungsten trioxide, ferro-tungsten, alloy steel, tungsten carbide, tungsten material, tungsten wire and tungsten alloy.

It can be used in fluorescent coatings, photographic light screen tubes, medicine, X-ray photographs and fluorescent lamps.

In addition, calcium tungstate is a very effective luminescent material under X-ray, electron beam and ultraviolet excitation, and can emit blue fluorescence.

Why Calcium Tungstate?

• Intrinsic Blue Luminescence: When excited by X-rays or UV light, it emits a brilliant blue fluorescence (peaking at approximately 425 nm), a characteristic essential for Medical Imaging and Radiology sectors in Germany and the UK.

• High Density & Atomic Number: With a density of 6.06 g/, it acts as an efficient absorber of high-energy radiation, making it an ideal Scintillation Crystal substrate.

• Thermal & Chemical Stability: It maintains its structural integrity under high temperatures, which is critical for Aerospace and Nuclear Research applications in North America.

• Excellent Laser Host: Its ability to be doped with rare-earth ions (like Neodymium) makes it a premier host material for advanced laser technology.

Purity, Standards, and Compliance

• High Assay Purity: Guaranteed ≥ 99.9% to 99.999% (5N Grade) available for specialized semiconductor and laser applications.

• Controlled Particle Size: Available in micronized grades (e.g., 1-5 \mu m) or custom mesh sizes to ensure uniform dispersion in coatings and screen manufacturing.

• Low Impurity Profile: Strictly monitored levels of iron, copper, and other transition metals to ensure maximum luminescence efficiency.

• Full Documentation: Every shipment includes a COA (Certificate of Analysis), SEM (Scanning Electron Microscopy) images, and MSDS for international registration.

Product Methods of  Bulk Calcium tungstate Powder.

Calcium tungstate is produced by reacting calcium oxide or calcium hydroxide with tungsten oxide or tungsten hydroxide in alkali metal hydroxide or carbonate solutions.

Sodium tungstate is mixed with sodium sulfide and dissolved with water, then aqueous zinc chloride is added, filtered, and the filtrate is treated with pure calcium chloride to produce calcium tungstate.

Frequently Asked Questions

While Scheelite is the natural mineral form, it contains impurities (like Molybdenum) that can degrade optical performance. Our Synthetic Calcium Tungstate is purified to ensure zero interference in sensitive X-ray or laser applications.

No. Calcium Tungstate is practically insoluble in water and organic solvents, which makes it an incredibly stable choice for long-term use in liquid-based coatings or high-humidity environments.

It should be stored in a cool, dry, and well-ventilated area. Due to its stability, it has an excellent shelf life, but we recommend keeping it in original sealed containers to prevent environmental contamination.

Yes. With the rise of Additive Manufacturing in Europe, micron-grade $CaWO_4$ is increasingly used as a functional filler in specialty filaments for radiation-shielding components.

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