How to Choose crucible for sale?

13 May.,2024

 

Metal, Ceramic, Quartz Crucibles - AEM Deposition

Chapter 4

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What's the main differences among ceramic crucibles, graphite crucibles and metal crucibles?

Ceramic Crucibles

Graphite Crucibles

Metal Crucibles

Ceramic crucibles, graphite crucibles and metal crucibles differ in terms of their properties and suitable applications:

Thermal Conductivity:

Generally, ceramic crucibles and metal crucibles have lower thermal conductivity compared to graphite crucibles. And metal crucibles typically exhibit greater thermal conductivity than ceramics. This means that ceramic crucibles may take longer to heat up and cool down.

Chemical Resistance:

Typically chemically inert and corrosion-resistant, ceramic crucibles are ideal for applications where potential reactions with the crucible material are a concern. While graphite is generally resistant to most chemicals, it can react with specific gases or substances, particularly at high temperatures. And depending on the metal or alloy used, metal crucibles may be susceptible to corrosion or chemical reactions with certain substances. Some metals, like stainless steel, are more corrosion-resistant than others.

Temperature Resistance:

Renowned for withstanding temperatures over 3000°C, ceramic crucibles are ideal for high-heat processes such as metal casting and glass melting. However, the specific graphite type and material impurities can affect their performance. While the temperature resistance of metal crucibles depends on the specific metal or alloy used. and many metals can withstand high temperatures, they may have limitations compared to graphite in certain extreme conditions. For applications requiring extremely high temperatures, ceramic crucibles might be slightly superior.

Durability:

Graphite crucibles are durable and resistant to thermal shock. However, they can be brittle and may be more susceptible to physical damage compared to metals. Also, ceramic crucibles are more prone to cracking or chipping if subjected to mechanical stress. While metals are generally more ductile and malleable, making metal crucibles more resistant to mechanical stress and physical damage.

Applications:

Ceramic Crucibles are commonly used in applications requiring chemical corrosion resistance and high-temperature stability, like in the analysis of minerals, metals, and ceramics. While graphite crucibles are popular in metallurgical applications, jewelry crafting, and procedures involving high temperatures, such as metal and alloy melting. And metal crucibles are typically used in applications depending on the specific metal or alloy and requiring durability. For example, stainless steel crucibles are used in laboratory and industrial settings, while platinum crucibles may be used in high-precision applications.

Crucibles Selection Guide

MSE Supplies is your source for many types of crucibles, including MgO crucibles ranging from 10 mL to 100 mL, metal crucibles, ceramic crucibles, and high-purity lab crucibles. We also produce customized crucibles to your specifications from your applications. Request a quote today.

What are Crucibles

Crucibles are essential lab tools that withstand extreme temperatures and harsh chemical conditions. They're containers crafted from high-purity materials like metals and ceramics, ensuring minimal contamination during use. Crucibles are integral to various scientific tasks, including melting, mixing, and analyzing samples under precise temperature and chemical control. With the diversity of materials available, such as Alumina, Zirconia, or Magnesium Oxide, it is critical to select the appropriate type of crucible for your specific application.

Types of Crucibles

What are crucibles made of? Crucibles comprise various materials, including metals, ceramics, and compounds, each suitable for different applications, often based on the crucible melting point. MSE Supplies offers many types of crucibles, including:

  • Alumina Crucibles: Widely used due to their high melting points and chemical resistance. Ideal for routine lab research.
  • Magnesium Oxide Crucibles: These can withstand ultra-high temperatures and are often preferable to lithium solid-state electrolyte synthesis.
  • Zirconia Crucibles: Known for their excellent wear resistance and are suitable crucibles for melting precious metals and super-alloys.
  • Boron Nitride Crucibles: Highlighted for their high thermal conductivity and excellent thermal shock resistance.
  • Graphite Crucibles: They are the best crucibles for melting metal and induction heating because of their high-temperature resistance.
  • Porcelain Crucibles: Economical choice for applications with temperatures below 1200 °C.
  • Quartz Crucibles: Excellent for material melting and chemical reactions in tube furnaces due to their thermal shock resistance and chemical inertness.

Order High-Quality Crucibles from MSE Supplies

When you choose MSE Supplies for all types of crucibles, you can count on the following:

  • Superior Quality: Our crucibles deliver reliable performance under extreme conditions, crafted from high-purity materials.
  • Broad Variety: We offer all types of crucibles in various materials like Alumina, Zirconia, and Magnesium Oxide for diverse applications.
  • Expert Assistance: Our experienced team provides insights into the best crucible for melting metal or your unique needs.

Order all types of crucibles from MSE Supplies today. We offer the best quality crucibles in the industry for the lowest prices. Our in-house materials scientists are committed to providing exceptional service and advice. Check out our special offers and programs, then order online or request a quote. 

If you have any questions, we’re here to help! Contact us online, or call at (520)789-6673.

What are the Factors for Selecting a Crucible?

There are several factors one needs to consider when selecting a crucible, this can seem a daunting task because there are several things to consider. These factors can range from needed volume, the shape, and the chemical reactions between the crucible and the chemicals you put in it no name just a couple. Here is a list of some of the most important factors to consider when selecting a crucible. 

  • What temperature will the crucible need to withstand?
  • What material crucible will be selected?
  • Is the material in the crucible going to react with the crucible?
  • Is the ramp rate being used going to thermally shock the crucible?
  • Is there a thermal gradient across the crucible, if so how will that affect the crucible?
  • What volume crucible will I need?
  • Will the geometry of the crucible be important?
  • Will the crucible fit in the furnace?
  • Is the crucible going to be used more than once?

This might seem a daunting list of questions to answer, but if you have ever chosen the wrong crucible for the job and ended up rebuilding your furnace you know the importance of answering these questions. If you need help choosing please continue reading this article. If you still need help our knowledgeable staff at MSE Supplies are here to help. Please feel free to email us at tech@msesupplies.com to help you select a suitable crucible for your needs. 

Alumina (Al2O3) Crucibles

Alumina crucibles (Al2O3) are widely used due to its versatility and its low cost. It is the most commonly used crucible for lab research use. The material has a high melting point is and relatively chemically inert. MSE Supplies offers a wide variety of shapes and sizes of Alumina crucibles.  If you need a size or shape not listed on our website, please email us at sales@msesupplies.com. 

Magnesium Oxide (MgO) Crucibles

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Magnesium Oxide (MgO) crucibles are good for ultra high temperatures and have a better chemical resistivity than that of alumina. MgO crucibles are usually inert to metals, slags, and superconducting compounds. When MgO crucibles are used in lithium solid state electrolyte synthesis or sintering, MgO has its own unique advantage of not reacting with lithium unlike Al2O3 crucibles, therefore it maintains the lithium vapor pressure better without causing access lithium loss in the solid state electrolyte. If you need a size or shape not listed on our website, please email us at sales@msesupplies.com. 

 

Zirconia (ZrO2) Crucibles

Zirconia (ZrO2) crucibles have excellent wear, chemical and temperature resistance. It can withstand high temperatures. It is ideal for applications which require temperatures higher than Alumina crucibles can withstand temperature (1600°C), such as melting of precious metals and super-alloys which have melting point higher than 1800°C. If you need a size or shape not listed on our website, please email us at sales@msesupplies.com.   

  • Melting point – 2,715 °C
  • Recommended Max working temperature – 1800 °C (air); 2100 °C (N2 or Vacuum)
  • Max ramp rate - 5 °C/min
  • Max cooling rate - 5 °C/min
  • High Purity Zirconia High Form Crucibles at MSE Supplies

Boron Nitride (BN) Crucibles

Boron Nitride (BN) crucibles are a synthetic technical ceramic material. It has outstanding thermal characteristics: high thermal conductivity (751 W/mK) and excellent thermal shock resistance. The unique property of BN crucible is that it is non-wetting with molten metal. It is widely used for crystal growth, melting metals, rare earth materials, fluorides, glass, silicon, molten salt and luminescent materials. It is ideal for oxygen sensitive applications. If you need a size or shape not listed on our website, please email us at sales@msesupplies.com. 

  • Melting point – 2,973 °C
  • Recommended Max working temperature – 900 °C (air), 2100 °C (vacuum), 2000 °C (N2 or Ar)
  • Max ramp rate - 50 °C/min
  • Max cooling rate – can quench
  • High Purity Boron Nitride Cylindrical Crucibles at MSE Supplies

Graphite (C) Crucibles

Graphite (C) crucibles are made from high purity (>99.9%) graphite raw material. It has unique features such as high temperature resistance, excellent acid and alkali resistance, good thermal shock resistance, excellent thermal/electrical conductivity and high mechanical strength. It is widely used for induction heating and metal melting, such as Ag, Au, Cu and Al metals.  If you need a size or shape not listed on our website, please email us at sales@msesupplies.com. 

  • Melting point – 3,600 °C (non-oxidizing environment)
  • Recommended Max working temperature – 400 °C (air), 2000 °C (non-oxidizing environment)
  • High Purity Cylindrical Graphite Crucibles at MSE Supplies

Porcelain Crucibles

Porcelain crucibles have good wear resistance, high temperature tolerance, excellent cold crushing and thermal shock resistance, and excellent chemical corrosion resistance. It is widely used for metallurgy, glass melting, gemstone purification, chemical industry and material science. It is the most economical crucible for applications with temperature lower than 1200 °C. If you need a size or shape not listed on our website, please email us at sales@msesupplies.com. 

  • Recommended Max working temperature – 1200 °C
  • Max ramp rate - 3 °C/min
  • Max cooling rate – 3 °C/min
  • High Form Porcelain Crucibles at MSE Supplies

Quartz Crucibles

Quartz crucibles (>99.99%) have excellent thermal shock resistance and are chemically inert to most elements and compounds, including virtually all acids, regardless of concentration, except hydrofluoric acid. They are widely used for material melting and chemical reactions in tube furnaces. If you need a size or shape not listed on our website, please email us at sales@msesupplies.com. 

  • Melting point – 1,670 °C (non-oxidizing environment)
  • Recommended Max working temperature – 1,200 °C
  • Max ramp rate - 3 °C/min
  • Max cooling rate – 3 °C/min
  • High Purity Quartz Boat Crucibles at MSE Supplies

MSE Supplies  (msesupplies.com/) is a major supplier of crucibles.  MSE Supplies offers a wide range of high purity lab crucibles, including Alumina (Al2O3)Zirconia (ZrO2), Quartz (SiO2), Magnesium Oxide (MgO), Boron Nitride (BN), Porcelain, Graphite (Carbon), Copper (Cu), Molybdenum (Mo), Nickel (Ni), Tantalum (Ta), Tungsten (W), Zirconium (Zr), PTFE and more.  Customized lab crucibles are available upon request.  Find popular high purity laboratory crucibles for sale at MSE Supplies. 

https://www.msesupplies.com/collections/high-purity-lab-crucibles-and-parts

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