Product Details

STA high purity 95%-99.8% Porous alumina insulation tube

Product Description

Applications of Porous alumina insulation tube:

Alumina is the best-known advanced ceramic material, is widely used in automotive, petro-chemical, fluid control,material transfer, Industry,electrical and electronic, semiconductor.Sapphire is single-crystal alumina.

Alumina ceramic is the most mature of the engineering ceramics, offering excellent electrical insulation properties together with high hardness and good wear resistance but relatively low strength and fracture toughness.

Advantage of Porous alumina insulation tube:

1. Excellent electrical insulation

2. High hardness

3. Relatively low strength and fracture toughness

4. Resistance to wear and corrosive

5. Excellent thermal stability

6. Resistance to high temperatures

7. High electrical resistivity

8. Good chemical stability and resistance

9. High corrosion resistance

10.Excellent thermal shock resistance

11.High thermal insulation

Sizes for your reference:

Furnace Tube
Diameter OD/ID (mm)	30/25		40/34		50/44			60/53		70/63		80/70		85/75		90/80		100/90		110/100
Max Length (mm)	2000		2000		2000			2000		2000		1700		1600		1600		1500		1200
Thermocouple Protection Tube
Diameter OD/ID (mm)	5/3	6/4		8/5		10/7			12/8		14/10		15/10		16/12		17/14		20/16		25/19
Max Length (mm)	300	1000		1600		2000			2000		2000		2000		2000		2000		2000		2000
Thermocouple Insulator
	Single Bore						Double Bores								Four Bores
Diameter OD/ID (mm)	OD1-12 ID0.5-8						OD1-12 ID0.2-4								OD1.6-12 ID0.35-3.5
Max Length (mm)	2000						2000								2000

The specification of alumina insulation tube:

Material	Unit	Al2O3-99.%	Al2O3-99%
Items	Unit	Al2O3-99.%	Al2O3-99%
Al2O3	%	99.7	99.3
SiO2	%	<0.1	—
Density	g/cm3	3.95	3.88
Water Absorption	%	0	0.01
Flexural Strength	Mpa	450	350
20°C Leakage rate	Torr/L.sec	<10-11	<10-11
High Temperature Curve	mm	1700°C 0.2mm is allowed	1600°C 0.2mm is allowed
High Temperature Bonding		1700°C Not	1700°C Not
20~1000°C Coefficient of Linear Thermal Expansion	mm.10-6/°C.m	8.6	8.2
Thermal Conductivity	W/m.K	25	25
Breakdown Voltage	KV/mm	20	20
20°C DC Volume Resistivity	Ohm/cm	1014	1014
High Temperature Volume Resistivity	1000°C MΩ	≥0.08	≥0.08
High Temperature Volume Resistivity	1300°C MΩ	≥0.02	≥0.02
1550°C Thermal Shock	—	Did not crack in 6 times cycle at 1550°C	Did not crack in 6 times cycle at 1550°C
Limit of Application	°C	1900	1800
Max Manufacturing Length for Tube	mm	1600	1600

Pictures of Porous alumina insulation tube:

Alumina ceramic protection tube:

Packaging & Shipping

Shippping term: DHL/FEDEX/TNT EXPRESS

Packaging: