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Crucibles, standards, accelerators

and consumables for Carbon and Sulfur

One of the fastest metal analyzers in the world

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. .	. MODEL CS-528 Carbon and Sulfur Analysis Crucible   Composition of crucible and lid: alumina ceramic SiO₂: 80% Al₂O₃: 20% . Operating temperature: 1000°C – 1700°C Maximum temperature: 1700°C . Shape: cylindrical C% content: 0.0003% S% content: 0.0002% . Crucible sizes: H25 mm × D25 mm / 23 mm × 23 mm / 24 mm × 24 mm / 26 mm × 26 mm Packaging: 1000 pieces per carton, 20 kg per carton
. MODEL: AR027 -20-40 Tungsten Mesh Accelerator . Tungsten > 99.5% C < 0.0002 S < 0.0002 . Packaging: 2500 g per bottle or different weights
	. MODEL: AR0266 -20-40 Tungsten Mesh Accelerator . Tungsten > 99.5% C < 0.0002 S < 0.0002  . Packaging: 2500 g per bottle or different weights

What are crucibles, standards, accelerators, and consumables for Carbon and Sulfur? Crucibles, standards, accelerators, and consumables are fundamental components in the carbon and sulfur analysis process. They ensure complete combustion, accurate measurement, and reliable calibration of the equipment with each use.

 

⚙️ Elements and consumables for Carbon and Sulfur analyzers

🔹 1. Crucibles (Ceramic Crucibles)

Crucibles are high-temperature-resistant ceramic containers used to hold the sample during combustion in the analyzer’s high-frequency furnace.

 

• • They are made from high-purity ceramic (usually alumina and silica).
  • They withstand temperatures above 2000°C.
  • They do not react with the sample or oxygen, ensuring clean combustion.
  • They are disposable, as each analysis requires a new crucible to avoid cross-contamination.

👉 Without the crucible, the sample could not be properly fused, and accurate C and S measurements would not be possible.

 

🔹 2. Standards

Standards or Certified Reference Materials (CRMs) are reference samples with known concentrations of carbon and sulfur.

They are used to:

• • Calibrate the analyzer before use
  • Verify measurement accuracy
  • Adjust the analyzer’s calibration curves

 

Example: a steel standard with 0.05% C and 0.01% S is used to verify that the instrument measures these values correctly.

👉 They ensure traceability and compliance with international standards (ASTM, ISO, etc.).

 

🔹 3. Accelerator

The accelerator is a solid substance (usually iron, tungsten, or tin) that is mixed with the sample in the crucible before combustion.

Its function is to increase the melting temperature and oxidation rate, ensuring that all carbon and sulfur in the sample are fully released as gases.

For materials with low thermal conductivity (such as ceramics or minerals), the accelerator is essential for complete and accurate combustion. It is added in small quantities together with the solid sample.

 

👉 Without the accelerator, results may be lower or incomplete.

 

🔹 4. Consumables

Consumables are all materials that are used up during each analysis or periodic maintenance, including:

• Ceramic crucibles
• Accelerators (Fe, Sn, W, etc.)
• Filters, tubes, seals, and O-rings
• Calibration standards
• Cleaning paper, brushes, tweezers, and optical protectors

👉 These consumables are essential to maintain accuracy, system cleanliness, and result repeatability.