Ceramic Crucibles

Fire Assay Crucibles for Accurate Metal Assaying

Refractory fire assay crucibles for gold, precious-metal and mineral analysis, available in multiple sizes with customizable dimensions, compositions and packaging.

Component Types

Detailed Product Information

Fire Assay Crucibles

Product Overview

TecCera supplies refractory ceramic crucibles designed for fire assay, precious-metal analysis, mineral testing and nonferrous-metal processing. The crucibles feature a dense ceramic body with good resistance to thermal shock, slag corrosion and chemical penetration.

Multiple sizes are available to accommodate different sample capacities and laboratory procedures. Dimensions, composition and packaging can also be customized according to customer requirements.

Key Features

* Refractoriness of at least 1350°C
* Recommended fire-assay operating temperature below 1150°C
* Dense and consistent ceramic structure
* Good resistance to thermal shock
* Resistance to slag corrosion and penetration
* Reduced slag adhesion for easier residue removal
* Suitable for repeated heating cycles under compatible operating conditions
* Custom sizes, compositions and packaging available

Typical Applications

* Precious-metal analysis
* Gold and silver assaying
* Fire assay laboratories
* Mining laboratories
* Mineral analysis
* Metallurgical testing
* Nonferrous-metal processing
* Smelting plants

Technical Properties

Property Typical Specification
Product type Refractory ceramic crucible
Refractoriness ≥1350°C
Recommended fire-assay temperature <1150°C
Main constituents SiO₂ and Al₂O₃
Available sizes 250–750 mL
Customization Dimensions, capacity, composition and packaging

Available Sizes and Packaging

Nominal Size	Outside Diameter	Height	Capacity	Wooden Case Dimensions	Quantity per Case	Quantity per 20′ FCL
30 g	88 mm	110 mm	250 mL	1070 × 1070 × 1080 mm	2,310 pcs	46,200 pcs
40 g	88 mm	135 mm	350 mL	1110 × 1070 × 1080 mm	1,980 pcs	39,600 pcs
45 g	88 mm	160 mm	500 mL	1080 × 1170 × 1080 mm	1,296 pcs	25,920 pcs
45 g	90 mm	155 mm	680 mL	1140 × 1030 × 1120 mm	1,296 pcs	25,920 pcs
50 g	105 mm	150 mm	700 mL	1140 × 1030 × 1120 mm	1,530 pcs	30,600 pcs
65 g	105 mm	165 mm	720 mL	1140 × 1030 × 1120 mm	1,425 pcs	28,500 pcs
75 g	120 mm	160 mm	750 mL	1080 × 1170 × 1080 mm	900 pcs	18,000 pcs

Typical Chemical Composition

Component	Content
SiO₂	54.60%
Al₂O₃	40.31%
Fe₂O₃	1.11%
TiO₂	0.47%
CaO	1.28%
MgO	0.34%
K₂O	0.61%
Na₂O	0.39%

Loss on ignition (LOI) 0.21%

Chemical composition values are typical and may vary by formulation and production batch. Final specifications should be confirmed before ordering.

Customization

Crucible dimensions, capacity, refractory composition and packaging can be customized according to the customer’s assay procedure and operating conditions. Please provide the required sample charge, working temperature, flux system, dimensions and order quantity when requesting a quotation.