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    AI Overview

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    AI Overview
    An alumina crucible for melting is a high-temperature ceramic container (made of aluminum oxide,
    Al2O3cap A l sub 2 cap O sub 3
    𝐴𝑙2𝑂3
    ) used in labs, jewelry making, and foundries to hold materials like precious metals (gold, silver), steel, or ceramics for heating, casting, and high-temp reactions, prized for its excellent thermal shock resistance, chemical inertness, and ability to maintain purity of contents. They come in various shapes (round, square, boat) and sizes, often with pour spouts, and are essential for processes needing extreme heat without material contamination. 
    Key Characteristics: 
    • High Heat Resistance: Can withstand extreme temperatures, ideal for melting metals and sintering.
    • Chemical Inertness: Won't react with or contaminate metals like gold, silver, or copper.
    • Thermal Shock Resistance: Handles rapid temperature changes without cracking, increasing lifespan.
    • Purity: Preserves the integrity of the melted material.
    • Versatility: Used in labs for sample prep, in jewelry for casting, and industry for metal processing. 
    Common Uses: 
    • Melting precious metals (gold, silver).
    • Casting and refining metals (copper, steel, alloys).
    • Sintering and calcination of ceramics.
    • High-temperature chemical analysis. 
    Important Considerations: 
    • Consumable: They wear down with use and heat, especially with torch melting.
    • Proper Heating/Cooling: Follow procedures to maximize life and prevent cracking.
    • Safety: Always wear protective gear (gloves, goggles) and ensure good airflow when using. 
    • Alumina Crucible - High Form Archives - AdValue Technology
      Alumina crucibles are widely used in melting, calcination and sintering of ceramics, glass and metals. Alumina crucibles are also ...
      AdValue Technology
    • 75x75x40mm Square Lab Crucible For High Temperature 1600°C
      About This Product ... The square 75x75x40mm design gives you 160ml capacity, which is perfect for small to medium batch work. The...
      Battlefield Modern Dentistry
    • MSE PRO High Purity Alumina (Al2O3) Crucible High Form
      High purity alumina (Al2O3) lab crucibles have high melting point, high hardness and good chemical stability. High form alumina cr...
      MSE Supplies·
    Show all
    • 75x75x40mm Square Lab Crucible For High Temperature 1600°C
      About This Product ... The square 75x75x40mm design gives you 160ml capacity, which is perfect for small to medium batch work. The...
      Battlefield Modern Dentistry
    • Alumina Crucible - High Form Archives - AdValue Technology
      Alumina crucibles are widely used in melting, calcination and sintering of ceramics, glass and metals. Alumina crucibles are also ...
      AdValue Technology
    • MSE PRO High Purity Alumina (Al2O3) Crucible High Form
      High purity alumina (Al2O3) lab crucibles have high melting point, high hardness and good chemical stability. High form alumina cr...
      MSE Supplies·
    • 200 Gram Ceramic Alumina Crucible Cup for Precious Metal Melting ...
      Product Summary: 200 Gram Ceramic Alumina Crucible Cup for Precious Metal Melting Torch Jewelry Making Gold Silver Copper Brass Br...
      Amazon.com
    • 250 Gram -160 DWT Mini Ceramic Alumina Crucible Dish for Melting ...
      Product Description 250 Gram Ceramic Alumina Crucible Dish Cup Pot. Designed to melt gold, silver, copper with a torch! Dimensions...
      Amazon.com
    • Leading Supplier of Alumina Crucibles
      Alumina crucibles are designed to maximize density and improve thermal shock. They are ideal for melting: * Steel * Cobalt based a...
      Eastern Crucible
    • Alumina Crucible for Sintering | The Virtual Foundry
      Crucible alumina is used in metal smelting to withstand high temperatures and corrosive environments, allowing for the efficient m...
      The Virtual Foundry
    • Are Al2O3 Crucible Suitable For Melting Precious Metals?
      Aug 21, 2023 — Alumina crucibles can endure extreme temperatures, making them suitable for high-temperature melting processes. Chemic...
      CS Ceramic Co.,Ltd
    • How to Make a Free Aluminium Melting Furnace
      Jan 11, 2021 — this air supply can be anything that will force air into the furnace increasing the oxygen and thus the temperature. a...
      YouTube·Matallurgy Data
      2m
    • 5.9 * 1.57 * 0.79inch Rectangle Alumina Ceramic Crucible Boat
      As the furnace heats up, the crucible ensures that the contents reach the required temperatures for optimal results. This alumina ...
      Amazon.com
    • 100 G Gram 70 DWT Mini Ceramic Alumina Crucible Dish Cup Pot ...
      100 G Gram 70 DWT Mini Ceramic Alumina Crucible Dish Cup Pot for Melting Casting Refining Gold Silver Copper Scrap Metal Jewelry C...
      Amazon.com
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    Videos
    How to Make Your Own Crucibles (for microwave metal melting)
    YouTube · Shake the Future
    Feb 9, 2025
    YouTube · Shake the Future
    12:00
    Make crucibles by mixing silicon carbide and sodium silicate, shaping, and microwaving. Harden by heating in a microwave or ceramic fiber kiln paper.
    Shake the Future
    YouTube·
    Feb 9, 2025

    How to Make Your Own Crucibles (for microwave metal melting)

    YouTube·Shake the Future·Feb 9, 2025
    YouTube
    Making DIY cruicble to melt gold
    YouTube · Picky Plans
    Apr 12, 2022
    YouTube · Picky Plans
    6:14
    DIY crucible for gold melting using aluminum oxide, clay, sodium silicate, and borax.
    Picky Plans
    YouTube·
    Apr 12, 2022

    Making DIY cruicble to melt gold

    YouTube·Picky Plans·Apr 12, 2022
    YouTube
    Homemade alumina crucibles
    YouTube · GoodEnough
    Mar 24, 2021
    YouTube · GoodEnough
    5:07
    DIY alumina crucible using slip method with grogged aluminum pieces, charcoal dust, and plaster mold.
    GoodEnough
    YouTube·
    Mar 24, 2021

    Homemade alumina crucibles

    YouTube·GoodEnough·Mar 24, 2021
    YouTube
    In this video
    • 00:18
      Materials
    • 01:04
      Pouring the slip
    • 01:29
      Drying the mold
    • 01:46
      Second slip attempt
    • 02:13
      Removing the crucible from the mold
    • 03:03
      Wet and dry comparison
    • 03:28
      Heating the crucibles
    • 03:50
      Checking the crucibles
    • 04:44
      Final result
    Feedback
    View all

    Alumina Crucible for Sintering


    The Virtual Foundry
    https://shop.thevirtualfoundry.com › products › sintering...
    The Virtual Foundry
    https://shop.thevirtualfoundry.com › products › sintering...
    Sintering crucible made of alumina for 3D printing applications, showcasing high-temperature material compatibility. Sintering Crucible - Alumina. $ 68.99 ...Read more
    Melting Crucible Alumina from shop.thevirtualfoundry.com
    $68.99 to $88.99 · In stock · 9-day delivery

    Crucibles – MTI Online Store


    MTI Corporation
    https://mtixtl.com › Furnaces › Accessories
    MTI Corporation
    https://mtixtl.com › Furnaces › Accessories
    48 products ; Quartz (SiO2) Cylindrical Crucible ; Quartz (SiO2) Boat Crucible ; Alumina (Al2O3) Cylindrical Crucible from 0.1 mL to 3000mL optional ; Alumina ( ...Read more

    Alumina High Form Crucible, 1000ml


    GraphiteStore.com
    https://www.graphitestore.com › alumina-high-form-cruc...
    GraphiteStore.com
    https://www.graphitestore.com › alumina-high-form-cruc...
    Alumina (Al 2 O 3 ) High Form Crucible, 1000 ml capacity. Inert to hydrogen, carbon and refractory metals; can be used at operating temperatures to 1750°C.Read more
    Melting Crucible Alumina from www.graphitestore.com
    $240.63 · In stock · $30 delivery · 30-day returns

    Alumina Crucible/Semicircle Corundum ...


    Amazon.com
    https://www.amazon.com › Crucible-Semicircle-Refract...
    Amazon.com
    https://www.amazon.com › Crucible-Semicircle-Refract...
    The crucible is made of aluminum oxide with 1800 degree firing temperature and 40 hours sintering time. · It cannot be used over 1800 degree · Heating rate cannot ...Read more

    Leading Supplier of Alumina Crucibles


    Eastern Crucible
    https://easterncrucible.com › alumina-crucibles
    Eastern Crucible
    https://easterncrucible.com › alumina-crucibles
    Our alumina crucibles are designed to both maximize density and improve thermal shock. They are ideal for melting steel; cobalt based alloys, nickel, chromium ...Read more
    Melting Crucible Alumina from easterncrucible.com

    High Purity Lab Crucibles


    MSE Supplies LLC
    https://www.msesupplies.com › collections › rectangular-...
    MSE Supplies LLC
    https://www.msesupplies.com › collections › rectangular-...
    MSE Supplies offers a wide range of high-purity lab crucibles for sale, including laboratory crucibles made of Alumina (Al2O3), Zirconia (ZrO2), ...
    Melting Crucible Alumina from www.msesupplies.com
    $6.95 · 2–8 day delivery · 30-day returns

    Are Al2O3 Crucible Suitable For Melting Precious Metals?


    CS Ceramic Co.,Ltd
    https://www.csceramic.com › blog › are-al2o3-crucible-s...
    CS Ceramic Co.,Ltd
    https://www.csceramic.com › blog › are-al2o3-crucible-s...
    Aug 22, 2023 — Alumina ceramic crucibles excel in maintaining uniform temperature distribution within the crucible, leading to consistent melting results. This ...Read more
    Melting Crucible Alumina from www.csceramic.com
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    AC0925 Alumina Crucible, Al2O3 Ceramic


    Stanford Advanced Materials
    https://www.samaterials.com › alumina › 925--alumina-c...
    Stanford Advanced Materials
    https://www.samaterials.com › alumina › 925--alumina-c...
    Dec 10, 2024 — Alumina crucibles can be used at high temperatures and do not contaminate most molten metals. Alumina Crucible Specification. Item. Unit. Al95.Read more
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    Alumina Crucible - High Form - AdValue Technology


    AdValue Technology
    https://www.advaluetech.com › ... › Alumina
    AdValue Technology
    https://www.advaluetech.com › ... › Alumina
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