High-refractory ceramic crucibles, (Al2O3, ZrO2, SiO2)

Ceramic crucibles

Main Specifications

  • Type: Ceramic Crucible Refractory
  • Size: according to customer requirements
  • Material: Al2O3, ZrO2, SiO2
  • Color: beige, brown, red
  • Maximum operating temperature: 1700
  • Features: low porosity, high wear resistance
  • The possibility of providing samples

Basic properties

Test conditions

Unit

99 alumina ceramic

Zirconia ceramics

Flint ceramics

Material

 

 

99% AL2O3

ZrO2

SiO2

physical properties

Bulk density

Room temperature

g / cm3

3.8

6.05

2.8

Breathability

Room temperature

 .

.Pass

passport

Water Absorption

Room temperature

%

0

0

0

Sintering temperature

 

° C

1800

1550

1350

Mechanical characteristics

Rockwell hardness

Room temperature

HRA

88

-

76

Flexural strength

Room temperature

Mpa

350

-

150

Compressive strength

Room temperature

Mpa

1300

-

900

Temperature characteristics

Maximum use temperature

 

° C

1700

1500

1200

Temperature resistance

20O ° C-1100O ° C

10Num

passport

passport

passport

Temperature coefficient of expansion

20O ° C-80O ° C

× 10-6mm / ° C

6.5-8.5

-

5.0-6.2

Thermal conductivity

25°C

W / mk

29

15

2.9

300°C

W / mk

18

13

2

Dielectric characteristics

Average loss

1MHz2O ° C

× 10-4

2.5

-

8.0

Loss tangent

1MHz8O ° C

× 10-4

3.5

-

Dielectric resistance

Room temperature

KV / mm

15

9

20

Dielectric constant

1MHz2O ° C

 

9-10.5

9-10

7.5

Volume resistance

2O ° C

Ω.cm

> 1012

-

> 1013

10O ° C

Ω.cm

1012-1013

1013

1010-1011

30O ° C

Ω.cm

> 1012

-

5 × 108

 

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