Corundum Crucibles|Alumina Crucibles|Labware Crucible Supplier|Johncera Group

HomeLabwareCorundum CruciblesCylindrical Crucibles
Product Details
Related Products
Contact Us

High Form Cylindrical Corundum Crucibles / Alumina Crucibles


Mechanical Properties
3.9 g/cc
Elastic Modulus
186 GPa
Compressive Strength
2082 MPa
Flexural Strength
326 MPa
Tensile Strength
131 MPa (20℃)
Fracture Toughness
5.42 MPa·m1/2
15 Gpa
Poisson's Ratio
Thermal Properties
Coefficient of Thermal Expansion
8.2575*10-6/K (RT-800℃)
Flexural Strength
21 W/(m·K)
Specifc Heat
0.636 J/(KG·K) (400℃)
Electrical Properties
Volume Resistivity
9.7*1011 Ω·cm
Dielectric Strength
26.8 KV/mm
9.8 (@1 Mhz)
Particle Size
Cumulative Percentage of Particle Size
D10 0.318 μm
D50 0.905 μm
D90 1.930 μm

Sample request

Standard Product Specifications

SKU Number

Capacity (ml)

Diameter (mm)

Height (mm)

AL 90-2




AL 90-3




AL 90-4




AL 90-5




*For other sizes and specifications, please contact [email protected] for more information

What is Corundum?

Corundum, so-called ‘alumina’ and ‘Al2O3’, is a crystalline form of aluminium oxide. It also has two other names that are not widely known: Ruby and Sapphire. The name ‘corundum’ is derived from the word Kurundam, which is the Tamil-Dravidian word of ruby-sapphire. Due to its gem varieties, Corundum has super high hardness (9.0 on the Mohs scale, just next to diamond).

Johncera’s Corundum Crucibles

Johncera is a professional advanced ceramic manufacturer, selling corundum (alumina) crucibles to industry customers and labs. Our alumina crucibles are made from 99.7% Japanese low soda alumina and come in a wide range of shapes and sizes.

Our team is made of experienced craftsmen who possess a comprehensive understanding of ceramics, chemistry, and minerals. Our every product is a work of art designed to aid you and your company in your area of research and technological advancement.

At Johncera, we adopt the traditional slip casting method in our manufacturing process to allow the crucibles wall to form in even thickness. With the latest technology, we take special care to ensure no impurities in the ceramics that might contaminate your samples.

Further, we have ensured that the ceramics we produce have good thermal conductivity, excellent thermal shock resistance, low coefficient of thermal expansion, and even heating.


Powder sintering for phosphors and electronic products

Heat treatment of powder

Heat treatment of lithium battery cathode material

Heat treatment of electronic materials for piezoelectric and dielectric

Chemical analysis

Want to learn more?

Let us help you find the right product for your application,

We will reply you in 24 hours.