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Porcelain crucibles are essential laboratory tools designed for high-temperature ash content determination, melting, and ignition analysis, typically withstanding temperatures up to 1000°C–1400°C. These chemically resistant, glazed ceramic containers are ideal for ashing samples (e.g., cellulose ether, cement) in muffle furnaces to measure non-combustible residue, as well as for small-scale melting tests.

Key Aspects of Porcelain Crucible Ash/Melting Tests:

Ashing Procedure: Samples are heated to carbonization (white smoke stops), treated with acids if necessary, and ignited in a muffle furnace at high temperatures (e.g., 750 ± 50°C) until only white ash remains.
Temperature Resistance: Porcelain crucibles can typically withstand up to 1000°C–1050°C or higher for specialized tasks, resisting sharp temperature changes without cracking.
Application Areas: These are used for LOI (Loss on Ignition) tests in cement and soil, chemical analysis, smelting small quantities, and drying or evaporating samples.
Crucible Maintenance: Crucibles are often glazed inside and out (except for the exterior bottom) and should be pre-ignited to constant weight before use.
Use Limitations: While high-temperature resistant, they are brittle and should not be cooled suddenly to avoid thermal shock.

Wholesale Ash Test Ceramic Crucible,Ash Test Ceramic Crucible Manufacturer,Ash Test Ceramic Crucible Factory
Ceramic cups can be used for ash analysis. They can be used in a variety of settings, including: * **Iron and steel labs** * **Che...
CS Ceramic Co.,Ltd
Porcelain Crucibles - Gilson Co.
Porcelain Crucibles are used with Muffle Furnaces for loss-on-ignition (LOI) testing of cement, fly ash, and soil materials. They ...
Gilson Co.
Characteristics and Applications of Porcelain Crucibles - Hawach
Nov 26, 2025 — A porcelain crucibles is a specialised laboratory apparatus used for heating substances to very high temperatures. It is made from...
Hawach Scientific

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Wholesale Ash Crucible Melting Test Porcelain ...

CS Ceramic Co.,Ltd

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CS Ceramic Co.,Ltd

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Available in a variety of sizes and shapes. ... Alumina crucible and boat are wildly used in laboratory and industrial analysis as well as metal and nonmetal ...Read more

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CS Ceramic Co.,Ltd

https://www.csceramic.com › ash-test-ceramic-crucible_sp

CS Ceramic Co.,Ltd

https://www.csceramic.com › ash-test-ceramic-crucible_sp

Medium form Ceramic Crucibles with Lids Used for smelting and assaying at Physical and chemical; Use in Iron & Steel lab, Use in Chemistry & laboratory.Read more

What Is A Porcelain Crucible and Lid Used for In the ...

Hawach Scientific

https://m.hawach.com › News

Hawach Scientific

https://m.hawach.com › News

Feb 6, 2025 — Porcelain crucibles and lids are important laboratory tools for high-temperature heating, melting, roasting, ashing, and evaporation.

How to Properly Use A Crucible In Laboratory: Your Essential ...

ggsceramic.com

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ggsceramic.com

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Jun 23, 2025 — Crucibles made from this material withstand sudden temperature changes and are ideal for your moderate-temperature applications. Porcelain ...Read more

Low Ashing Crucibles - High Purity for Metal Melting

Alibaba.com

https://www.alibaba.com › ... › Graphite Crucible

Alibaba.com

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Discover low ash graphite crucibles with ≤0.03% ash content, 3000℃ max temp, and high strength for gold, copper, and industrial melting.

What Is A Porcelain Crucible? Your Essential Guide To ...

Kintek Solution

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Kintek Solution

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Discover the uses, temperature limits, and key properties of porcelain crucibles for heating, ashing, and melting in the laboratory.

30 Ml Porcelain Ash Crucible

Amazon.com

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Amazon.com

https://www.amazon.com › 30-ml-porcelain-ash-crucible

Porcelain Crucible Cup 30ml for Foundry Melting Casting Refining · Extra 5% off on orders $50 ...Read more

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Evaporating Dish chamistry lab porcelain

Liling Zen Ceramic Co., Ltd

https://www.zen-ceramic.com › porcelain-crucible-boat

Liling Zen Ceramic Co., Ltd

https://www.zen-ceramic.com › porcelain-crucible-boat

90*60 Square porcelain crucible for ash content analysis of coal is normally used to test coal ash content in high temperature furnace or muffle furnace.Read more