Porcelain, PTFE, Stainless Steel, Nickel, Carbon Steel, Zirconium and Vitreous Carbon

Porcelain Crucibles

Economical glazed porcelain crucibles are supplied with lids. They are made from high purity raw material and are designed to withstand sudden temperature changes without cracks or deformation. Features are:

• Good chemical and acid resistance
• Can be used to up to 1050°C (1922°F)
• Low cost
• Include glazed lids
• Incompatible with  HF and Alkali salts
• Available in 10, 15, 20, and 100ml
• Standard and wide form

Platinum Crucibles

Platinum exhibits excellent resistance to chemical reactions and has a high melting point. Platinum is widely used for chemical analysis. These crucibles do not include a lid; lids must be purchased separately. Features are:

• Can be used to 1200°C (2192°F)
• Maintains strength at higher temperatures
• Virtually chemically inert
• Resist oxidization in air
• High corrosion resistance against acids and melted salts

PTFE Crucibles

PTFE crucibles are molded from pure PTFE, a chemically inert material. Smooth surfaces avoid contamination and are easily cleaned. Features are:

• Compatible with cryo temperatures to moderate heating -196 to 280°C (-321 to 536°F)
• Chemically inert
• Crack-free

Stainless Steel Crucibles

Stainless steel crucibles can be used in cryo applications. They are a formed from a single piece of material and are less fragile than porcelain crucibles when dropped on a hard surface. Highly polished surface. Features are:

• Can be used from -180 to 800°C (-292 to 1472°F)
• Include lid
• Sturdy
• Good resistance to concentrated alkali solutions
• Resistant to nitric acid, nitrates, potassium permanganate
• Medium resistance to dilute sulfuric acid, acetic acid, boric acid, organic acids and low concentrations of sulfates, phosphoric and bromide solutions.

Nickel Crucibles

Nickel crucibles are made from high purity nickel (99.9%) with impurities of Ti and Mg. Made from one piece with highly polished surfaces. Not to be used in assays where the presence of Ni could affect the results. Features are:

• Includes lid
• Very low oxidization in air
• Temperatures up to 600°C (1112°F)
• Used for assays with NaOH or Na2O (this would attack porcelain)
• Good resistance to alkali and seawater
• Excellent resistance to damp chlorine and gaseous hydrochloric acids
• Low resistance to organic, hydrochloric, sulfuric and diluted nitric acids

Carbon Steel Crucibles

Carbon steel crucibles are made from a low alloy steel; they are made from one piece. Low cost alternative for special applications.  Highly polished surface. These crucible sometimes exhibit light rust; this can be easily removed with grade 0000 fine steel wool. Features are:

• Can be used up to 500°C (932°F)
• Includes lid
• Affordable

Crucible and Laboratory Tongs

Available in stainless steel and nickel plated steel.