Steatite Ceramic Insulator Bead

• Customization: Available
• Feature: Long Time Materials
• Refractoriness (℃): 1580< Refractoriness< 1770
• Model NO.: GT-317
• Shape: Pipe
• Type: Heat-Resistant Material
• Alumina Content: >75%
• Size: Od 8-50
• Color: White, Grey
• End: Beo
• Application: High Temperature Resistant, High Wear Resistance
• Finish: Collar, Slot, Curve
• Material: Steatite
• Transport Package: Plywood Case
• Specification: Rohs
• Trademark: shangtao
• Origin: Shanghai, China
• HS Code: 8547100000
• Production Capacity: 500000 PCS Per Year

Product Description

Gongtao company mainly produce alumina tubes, rods and various industrial ceramic parts, which are mainly used in thermalcouple temperature, liquid steel continous temperature, various industrial furnace(containig vacuum furnace, carburizing furnace, wire furnace, atmosphere furnace etc), especially widely used in petrochemical, spinning, electric, instrumentation, mechanical workout, military project etc industry.

Our items are various and exported to many countries. Welcome to contact us!
 

Item	Testing condition	Unit	steatite
Bulk density		g/cm^3	2.7
Flexural Strength		MPA	160
Coefficient of linear expansion	20~100°C	mm/C	8x×10-6
Permittivity	1MHz 20C		7.5
Insertion loss                     Tangent number	1MHz 20C	×10^-4	8
Bulk density resistance	100°C	Ω·Cm	>10^12
Puncture strength		KV/mm	20
Sintering temperature		C	1350

 

Dimension		Outer dia. mm	Inner dia.mm	Length mm	Remark
Item
Thermocouple protection tube		7-120	1-110	10-2000	If you need others,we can customize for you.
Insulated tube	Single hole	2-120	1-110	10-2000
(inner core)	Double holes	1-10	0.4-2	10-2000
	Four holes	2-10	0.5-2	10-2000

Property of material:

Material	85 Al2o3	90 Al2o3	95 Al2o3	99 Al2o3
Al2o3	85%	90%	93%	99.30%
Fe2o3	≤ 1.0	≤ 0.5	≤ 0.5	≤ 0.3
Desnsity: g / cm3	3.4	3.5	3.6	3.85
Vickers Hardness	≥ 8.6	≥ 8.8	9	9
Water Absorption:%	≤ 0.2	≤ 0.1	≤ 0.085	≤ 0.01
Refractoriness:°C	1580 °C	1600 °C	1650 °C	1800°C
Flexural Strength:Mpa	180	200	240	280
Wear Rate( at room temperature,  erosion, 100 grinding)%	≤ 3	≤ 2.5	≤ 1	≤ 0.5

 

Feature	Application	Main usage
1.Great mechanical strength	Electric appliance industry                                      Automotive industry	1.Heat treatment furnace  and toughened furnace
2.High softening temperature
3.Good resistance to thermal impact
4.Small thermal expansion coefficient	Mechanical industry               Engineer industry	2.Inner liner tube and heating  tube in electric furnace
5.Good chill and abrupt heat properties
6. Resistance to acid and alkali corrosion