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The "Invisible Shield" for Stable Operation of Electronic Devices! Alumina Insulator Ceramic Tubes Are Here!
Who understands the stability anxiety of electronic components under high temperature and high pressure?
This high-purity alumina insulator ceramic tube fully delivers "peace of mind"!
✅ Premium Purity & Insulation: Choose from 95%/99%/99.5% high-purity alumina. 99.5% grade boasts volume resistivity ＞10¹⁶ Ω・cm, dielectric strength 20-25 kV/mm, and tanδ ＜1×10⁻⁴ at high frequency—zero leakage risks, maximum circuit precision.
✅ Unbeatable Durability: Mohs hardness 9 (second only to diamond), 8x more wear-resistant than steel pipes. Stable work from -40℃ to 1600℃, no cracks after 50 thermal shock cycles—ideal for harsh industrial & electronic environments.
✅ Wide Applications: Perfect for semiconductor equipment, power electronics, medical instruments, industrial sensors & more. Wherever insulation meets tough conditions, we’ve got you covered.
Full Application Scenarios: Semiconductor equipment, power electronics, medical instruments, industrial sensors... It’s competent wherever insulation protection is needed!
Avoid pitfalls in electronic component selection—choose Alumina Insulator Ceramic Tubes! DM us for customized solutions, and enjoy surprise discounts on bulk purchases～
Application
Mechanical Properties
Properties
Unit
95%Al2O3
99%Al2O3
99.5%Al2O3
Colour
--
White
Yellow
Yellow
Density
g/cm³
3.7
3.85
3.9
Hardness
GPa
13.7
15.2
15.7
Compressive Strength
MPa
2000
2160
2350
Flexural Strength
MPa
280
310
350
Fracture Toughness
MPa・m1/2
3~4
3~4
4.5
Modulus of Elasticity
GPa
320
360
370
Poissons Ratio
--
0.23
0.23
0.23
Thermal Properties
Properties
Unit
95%Al2O3
99%Al2O3
99.5%Al2O3
Maximum Use Temperature
℃(No load)
1650
1650
1650
Thermal Conductivity @ 20°C
W/(m・K)
24
29
32
Thermal Expansion a at 20–400°C
1 x 10-6/°C
7~8
7~8
7~8
Specific Heat
J/(kg・K)
780
790
780
Thermal Shock Resistance
℃(Put in water)
200
200
200
Electrical Properties
Properties
Unit
95%Al2O3
99%Al2O3
99.5%Al2O3
Dielectric Constant
1MHz
9.4
9.9
9.9
Dielectric Strength
V/m
15 x 10 6
15 x 10 6
15 x 10 6
Dielectric Loss
1MHz
4 x 10 -4
4 x 10 -4
4 x 10 -4
Volume Resistivity @ 25°C
Ω・cm
>10 14
>10 14
>10 14
Volume Resistivity @ 500°C
Ω・cm
>10 8
>10 8
>10 10
Various Types of Alumina Ceramic Sealing Ring
We Can Do OEM and 0BM According to Your Drawing and Requirements.
Features of alumina ceramic
* Relatively low density;
* Extremely high operating temperature;
* Very high hardness and compressive strength;
* Excellent electrical insulation properties;
* Corrosion and wear resistance;
* Biologically inert, food compatibility.
Alumina Ceramic Properties
The following only lists the performance parameters of the three most common aluminum oxide ceramics.
Normally, alumina ceramics are composed of these types
Packing
FAQ
Q1. Do you provide product samples?
Yes, we provide samples subject to availability. A nominal sample fee may apply in some cases, and shipping costs are borne by the customer.
Q2. What are your accepted payment methods?
We accept T/T (bank transfer) in advance, Western Union, Alipay, and PayPal.
Q3. What is your typical delivery lead time?
Lead times vary depending on product requirements, including material selection, dimensions, and specific manufacturing processes.
Q4. Do you perform quality inspection before shipment?
Yes, we conduct 100% inspection of all goods prior to delivery to ensure they meet specified standards.
Q5. What other ceramic materials do you offer?
We supply a range of advanced ceramic materials, including Alumina, Zirconia, Aluminum Nitride,Boron Nitride, Silicon Nitride, Machinable Glass Ceramic, and related specialized ceramic
