Zirconium Metal powder, Grade MX, aqueous suspension

Zr

CAS Number: 7440-67-7 EC Number: 231-176-9 REACH Number: 01-2119490102-49-0004

Zirconium Metal powder, Grade MX, aqueous suspension (CAS 7440-67-7, molecular formula Zr) is an inorganic chemical supplied as a technical-grade material. It is typically a black to grey suspension.

For the production of highly reactive fuzes and igniter-compositions in pyrotechnics for use in ammunition, explosives, airbags and belt pretentioners; for ignition pastes in photographic flash cubes; for getter compositions.

Typical specifications include: Zr total + Hf total 96.5 - 98.2 %; Zr active + Hf active 86.4 – 93.2 %; approx. 2 % (natural content).

Highly flammable solid. Dust explosion hazard.

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Physical and Chemical Properties

Property Value

IUPAC Name

zirconium

Appearance

Suspension

Color

Black To Gray

Boiling Point

3,577 °C (Zirconium)

Density

6.43 g/cm3 at 20 °C Method: OECD Test Guideline 109 (Zirconium)

Solubility in Water

(practically insoluble)

Additional Properties

Average particle size (Blaine): 2.2 +/- 0.5 μm Particle size: min. 99.9 % 45 μm Ignition gain: 31.5 +/- 1.2 % Combustion rate: 14 +/- 6 s/50 cm (Albemarle standard) Auto ignition temperature: 180 +/- 20 °C Apparent density: approx. 1.4 g/ccm

Applications

For the production of highly reactive fuzes and igniter-compositions in pyrotechnics for use in ammunition, explosives, airbags and belt pretentioners for ignition pastes in photographic flash cubes for getter compositions.

Specifications

Zr total + Hf total 96.5 - 98.2 %
Zr active + Hf active 86.4 – 93.2 %
Hf approx. 2 % (natural content)
Si max. 0.5 %
H max. 0.2 %
Al max. 0.1 %
Fe max. 0.1 %
Ca max. 0.05 %

Method of Analysis

Determination of ignition gain, particle size distribution, average particle size, specific surface area (BET), combustion properties, gravimetric analysis of zirconium, spectrometric determination of impurities. For specific information on our standard methods of testing see the special metals sales program.

Handling Instructions

Highly flammable solid. Dust explosion hazard. A fine zirconium powder which ignites very easily and burns extremely rapidly at white heat. Zirconium metal powder is fairly inert to most chemical reagents, but at elevated temperatures is attacked by oxidizing agents and acids. Zirconium powder is attacked by cold acid fluoride solutions. Keep away from flames, sparks and heat sources. Use ground connected metallic apparatus to avoid sudden ignition by electrostatic discharge. Self ignition is possible. Vacuum drying of suspensions is not recommended. Wear gloves, a face shield or safety goggles. In case of fire cover with dry sand or dry chemical/dolomite (powdered limestone). Never extinguish with water, carbon dioxide, or halocarbon. See our material safety data sheet and special precautionary advice for more information on safety.

Storage Instructions

Store in tightly closed containers.

Legal Disclaimer

The information presented herein is believed to be accurate and reliable but is presented without guarantee or responsibility on the part of Albemarle Corporation and its subsidiaries and affiliates. It is the responsibility of the user to comply with all applicable laws and regulations and to provide for a safe workplace. The user should consider any health or safety hazards or information contained herein only as a guide and should take those precautions which are necessary or prudent to instruct employees and to develop work practice procedures in order to promote a safe work environment. Further, nothing contained herein shall be taken as an inducement or recommendation to manufacture or use any of the herein materials or processes in violation of existing or future patent.