Refractory 99% Al2O3 Precision Opening Industrial Ceramic Heater Aluimina Tube

WITH GOOD THERMOSTABILITY, CORROSION RESISTENCE, AIR TIGHTNESS, THERMAL SHOCK RESISTANCE ETC PROPERTIES, CERAMIC TUBES ARE WIDELY USED IN VARIOUS INDUSTRIAL FURNACE FOR SUPPORTING, THREADING AND INSULATION ETC PURPOSE.

CERAMIC TUBES WITH UNIFORM WALL THICKNESS, WHICH HAVE GOOD THERMOSTABILITY, INSULATION, CORROSION RESISTENCE AND TEMPERATURE STABILITY ETC PROPERTIES, ARE WIDELY USED IN THREAD TUBES, FORMING TUBE, AND OXYGEN(NITROGEN) TUBE ETC.ALL PRODUCTS CAN PASS THE GERMAN STANDARD:DIN43724/DIN43725/DIN40680

FOLLOW THE DETAIL DRAWING

NO.

Property

Unit

Alumina

1

Al2O3

%

>99.3

2

SiO2

%

-

3

Density

g/cm3

3.88

4

Water absorption

%

0.01

5

Cold compressive strength

MPa

350

6

20ºC leakage rates

Torr/L.sec

<10-11

7

Twisting in high temperature

mm

0.2 allowed in 1600ºC

8

Bonding in high temperature

not bonded in 1600ºC

9

20-1000ºCcoefficientofthermalexpansion

mm.10-6/ºC.m

8.2

10

Thermal conductivity

W/m.k

25

11

Electric insulation strength

KV/mm

20

12

20ºCdirect current

insulation resistance

Ohm/cm

1014

13

High-temperature

insulation resistance

1000ºC MΩ

≥0.08

1300ºC MΩ

≥0.02

14

Thermal shock resistance

4 times not cracked in 1550ºC

15

Maximum working temperature

ºC

1800