Copper Tungstate Powder

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Copper tungstate is an inorganic compound with versatile properties suited for various industrial and research applications. This guide serves as an in-depth reference on copper tungstate in powder form – covering composition and characteristics, specification standards, manufacturing processes, suppliers, pricing, applications across fields, FAQs and more.

Overview of Copper Tungstate Powder

Copper tungstate powder is a bright blue inorganic salt classified as a heterometallic oxide with the chemical formula CuWO4. Key properties include:

  • Composition: Copper, tungsten, oxygen
  • Color: Intense blue
  • Form: Fine particulate powder
  • Key traits: Water-soluble, oxidizing, paramagnetic
  • Molecular weight: 331.602 g/mol
  • Density: 4.28 g/cm3 at 20°C

Offered in various purities and particle size distributions, copper tungstate powder demonstrates unique photophysical, oxidative, cryogenic andmecochemical capabilities lending utility across diverse industries.

copper tungstate powder

Copper Tungstate Powder Composition

Copper tungstate comprises three elemental components – copper, tungsten and oxygen in fixed stoichiometric ratios:

Elemental Composition

Element Percentage
Copper (Cu) 33.06%
Tungsten (W) 55.31%
Oxygen (O) 11.63%

Table 1: Copper, tungsten and oxygen composition in copper tungstate

This trimetal oxide arrangement gives rise to signature deep blue coloring, moderate solubility in water and other solvents, and notable physical properties.

Properties of Copper Tungstate Powder

Technical characteristics of copper tungstate powder include:

Physical Properties

Trait Description
Color Intense blue
Form Fine particles, powder
Odor Odorless
Solubility Soluble in acids and ammonia
Magnetism Paramagnetic
Refractive Index 2.030

Chemical Properties

Attribute Details
Formula CuWO4
Molecular Weight 331.602 g/mol
Density 4.28 g/cm3 at 20°C
Melting Point No data
Stability Stable under normal conditions
Hazard Class Low toxicity

Table 2A: Physical and chemical properties of copper tungstate powder

Thermal Properties

Measure Value
Decomposition 230°C
Heat Capacity 0.081 cal/g/°C
Entropy 38 cal/mol/K

Optical Properties

Metric Detail
Reflectance Blue light
Emission Blue fluorescence
Band gap 2.97eV

Table 2B: Thermal and optical traits of copper tungstate powder

These technical properties inform suitable applications for the material across research, optics, ceramics, catalysts and specialty chemicals.

copper tungstate powder

Copper Tungstate Powder Specifications

Commercial copper tungstate powder is available graded by:

Purity Grade Standards

Grade Purity
Standard 90-95%
High Purity 97-99%
Ultra High Purity 99.9-99.99%

Particle Size Ranges

Mesh Size Micron Range
200 mesh Below 75 microns
325 mesh Below 45 microns
400 mesh Below 38 microns
500 mesh Below 25 microns

Table 3: Typical purity grades and particle size standards for copper tungstate powder

More stringent control of impurity levels and smaller diameter particulate improves performance for certain applications but increases cost.

Manufacturing Processes

Commercial production of copper tungstate powder relies on:

  • Solid state reactions
  • Wet chemical precipitations
  • Hydrothermal syntheses
  • Electrochemical crystallizations
  • Spray drying techniques

Based on specific process conditions like precursor compounds, temperature profiles, solvent management and drying methods, powders can be tailored to meet purity, crystalline morphology, grain size distribution, surface area and other critical application requirements.

Suppliers of Copper Tungstate Powder

There exist a range of chemical manufacturers providing copper tungstate powder at scales from grams to metric tons:

Manufacturer Brand Names Price Range
American Elements AE Copper Tungstate $100-500/kg
Stanford Materials Corp SMC CuWO4 $150-600/kg
SAT nanoTechnology sat CuWO4 $120-450/kg
Hongwu International HWI Cu-Tun-Ox $90-375/kg
Kurt J Lesker KJL CuWO4 $250-700/kg

Table 4: Select reputable copper tungstate suppliers and indicative pricing

Quoted pricing is general guidance only as costs vary based on order volumes, purities, additional screening or analytical testing requirements. Reach out to vendors directly for exact quotations.

Applications of Copper Tungstate Powder

Notable uses of copper tungstate leveraging unique composition and properties:

Industry Applications
Electronics Phosphors, Conductors, Dielectrics
Energy Battery Electrodes, Fuel Cell Catalysts
Coatings Pigments, Primers, Protective Films
Metallurgy Alloying Additive, Grain Refiner
Research Photocatalysts, Chemical Syntheses
Other Humidity Sensors, Scintillators

Table 5: Diverse applications for copper tungstate across major industries

Specific applications take advantage of water solubility, oxidative power, photoluminescence, paramagnetism, coating adhesion and inorganic reactivity.

Comparative Analysis

How does copper tungstate compare to alternative tungstate and copper compounds?

Material Advantages of Copper Tungstate Disadvantages
Cobalt Tungstate Lower price More catalytic activity Toxicity hazard Blue color inferior
Bismuth Tungstate Higher density Better radiation block Cost Radiopaque views only
Copper Oxide Easier to produce Higher purity Less chemically reactive Brown hue

Table 6: Comparative pros and cons of copper tungstate versus other similar inorganic materials

While possessing some drawbacks, copper tungstate represents intriguing cost/performance balance – facilitating adoption in optics, energy, metallurgy and research.


Q: Does copper tungstate occur naturally or is it purely synthetic?

A: Unlike minerals like malachite, copper tungstate does not form naturally. All commercial material is manufactured through chemical production processes.

Q: What is the shelf life for copper tungstate powder?

A: Stored properly in air-tight containers away from moisture, copper tungstate powder lasts at minimum 1-2 years. Higher purity grades demonstrate better stability – persisting over 5+ years before degradation.

Q: Is copper tungstate powder toxic?

A: Copper tungstate demonstrates relatively low toxicity with oral LD50 ratings above 1000mg/kg. Regardless, standard precautions for handling inorganic compounds are advised – gloves, goggles, masks if encountering particulates.

Q: What is the difference between copper tungstate and tungsten oxide?

A: The key distinction is copper tungstate contains both copper and tungsten oxides together in a heterometallic arrangement while tungsten oxide refers to WOx compounds without copper.

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