Rectangular Corundum Crucibles / Alumina Crucibles | Johncera Group

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Rectangular Corundum Crucibles / Alumina Crucibles

Features

Raw Materials (Japanese Alumina)

> 99.7% Al2O3; < 0.01% Fe2O3

Density

≥ 3.9 g/m3

Crystal

α-alumina

Temperature Resistance

1400 - 1600 Celsius

Lids

Available with/without lids

Manufacturing Method

Slip Casting

Thermal Shock Resistance

Good

Coefficient of Thermal Expansion

Low

Thermal Conductivity

Good

Chemical Resistance

Good


*Available in various sizes, please contact [email protected] for more information

Sample request

Standard Product Specifications

SKU Number

Capacity (ml)

Length (mm)

Width (mm)

Height (mm)

C 21

16

50

20

10

C 22

5

50

25

20

C 23

50

50

40

35

C 31

3

70

12

7

C 32

30

70

30

20

C 33

140

70

52

50

C 34

10

75

18

14

C 35

20

75

20

20

C 36

150

75

52

52

C 41

5

100

10

10

C 42

25

100

20

20

C 43

40

100

30

20

C 44

55

100

40

20

C 45

110

100

50

30

C 51

30

120

30

15

C 52

100

120

60

20

C 53

220

120

60

40

C 54

300

120

80

40

C 61

40

150

20

20


*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.


Applications

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

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