High Thermal Conductivity Alumina Sheets / Alumina Ceramic Board
1mm Thickness
Alumina (Al2O3) has a wide application due to its versatility and
low material cost. Alumina possesses a high melting point, strong
hardness, and good chemical stability, making it a good material to
withstand high temperature and chemical corrosion. Alumina sheets / Alumina Ceramic Board are available in different dimensions and thicknesses. Call for
custom shapes and sizes.
| Product Name | Purity / Method | Size | Thickness | Polishing |
| Alumina Ceramic /plate/sheet/board/substrate | 96%
99%
99.7% | 114.3 x 114.3mm
101.6 x 101.6mm
100 x 100mm
76.2 x 76.2mm
50 x 50mm
10 x 10mm
φ50.8mm
φ100mm
Or others | 0.1mm
0.25mm
0.385mm
0.5mm
0.635mm
1.0mm
2.0mm
Or others | Un-polished surface
Single side polished
Double side polished
Unpolished: Ra 0.2~0.75um Polished: Ra 0.02~0.05um Best Polished: Ra <10 nm |
Alumina ceramic substrate has lots of advantages, it has good
thermal conductivity, stable insulation, thermal shock resistance,
wear resistance, Anti-acid and Anti-alkali etc. Can be used in
thick film hybrid integrated circuits HTC, LED ceramic heat sink,
power modules, semiconductor devices and other fields. Commonly
used ceramic substrates are Al2O3, AlN, SiC, BeO, BN, ZrO2 and
glass ceramics. Although the thermal conductivity of Al2O3 ceramic
substrate is not high (20W/m.K), it is the most widely used ceramic
substrate because of its relatively simple production process, low
cost and low price.
Alumina Sheet with properties of insulation, thermal conductivity
and breaking strength. Moreover, one of the unique properties is
its surface roughness. Mingrui provide Alumina sheet / Alumina ceramic board which is excellent in adhesion with a thin film and thick film
metalization due to fine particles.
■Good smoothness / flatness with less porosity. Excellent in
adhesion with thin film and thick film materials.
■Less variance in outline, plate thickness, slit pitch, etc.
■Minimal warpage, bending, and undulation.
■Physical and chemical properties are stable even under a hot
environment. Excellent in thermal shock resistance. High thermal
conductivity and coefficient of thermal expansion similar to that
of silicon.
■Superior mechanical strength. Products with higher mechanical
strength are also in our lineup.
■Excellent resistance against oil and chemical.
■Excellent in insulation properties, high dielectric breakdown
voltage, high surface resistivity / volume resistivity, and small
dielectric constant.
■Stable breaking strength, and less variance in shape or
dimensions.
■The high reflective substrate, especially suitable for optical
applications such as LED, is also available.
Applications of Alumina sheets/ Alumina Ceramic Board :
Alumina ceramic is mainly used in large power equipment, IC MOS
tube, IGBT chip heat conducting insulation, high frequency power
supply, communication, mechanical equipment, strong current, high
voltage, high temperature and other thermal heat insulation parts
need products.
Physical properties: high thermal conductivity, high voltage
insulation resistance, high temperature resistant, abrasion
resistant, high strength.
Properties of Alumina and Zirconia Ceramic :
| Properties | Units | 95 Alumina | 99 Alumina | ZrO2 |
| Density | g / cm³ | 3.65 | 3.92 | 5.95-6.0g/cm³ |
| Water absorption | % | 0 | 0 | 0 |
| Coefficient of thermal expansion | 10-6/K | 7.9 | 8.5 | 10.5 |
| Modulus of Elasticity Young's Mod | GPa | 280 | 340 | 210 |
| Poisson's ratio | / | 0.21 | 0.22 | 0.3 |
| HV Hardness HV | MPa | 1400 | 1650 | 1300-1365 |
| Flexural Strength @ room temperature | MPa | 280 | 310 | 950 |
| Flexural Strength @700°C | MPa | 220 | 230 | 210 |
| Compressive Strength @ room temperature | MPa | 2000 | 2200 | 2000 |
| Fracture Toughness | MPa *m 1/2 | 3.8 | 4.2 | 10 |
| Heat conductivity @ room temperature | W/ m*k | 18-25 | 26-30 | 2-2.2 |
| Electrical Resistivity @ room temperature | Ω*mm2 /m | >1015 | >1016 | >1015 |
| Max use temperature | °C | 1500 | 1750 | 1050 |
| Resistance to acid alkaline | / | high | high | high |
| Dielectric Constant | / | 9.5 | 9.8 | 26 |
| Dielectric Strength | KV/mm | 16 | 22 | / |
| Thermol Shock Resistance | △ T ( °C ) | 220 | 180-200 | 280-350 |
| Tensile Strength @ 25 °C | MPa | 200 | 248 | 252 |
Company Introduction:
We ( Dongguan Mingrui Ceramic Technology Co., Ltd ) are a
professional manufacturer specialized
in R&D, manufacturing and selling customized all kinds of high
precision zirconia and alumina ceramic parts . Our main products
include ceramic rod , ceramic tube, ceramic plunger, ceramic valve,
ceramic plate, ceramic shaft and bearing , ceramic nozzle etc ,
which are mainly used in industrial fields of Machinery,
Petrochemical oil and gas, Valves, Automotive, Food Processing,
Fluid Handling, Process Control, Thermal Processing, Aerospace,
Defense, Eletronic and Electrical, Textile, Mechanical,
Engineering, Mineral Processing, etc.
We have a full service include mold design and development ,
ceramic forming , precision machining
and precision detection technology. We have achieved great
successes in particular requirements
which is based on cooperating with Tsinghua University and getting
rich experience by our professional technical engineer teams . Our
factory have an unique technical called mirror polishing which
improve
our products more smooth , bright than other competitors.
More photos of Alumina substrates :
Our High precision Machining Machine :
Laser Cutting machine making holes :
FAQ :
1. What kind of industry ceramics do you have ?
We specialized in 95% 97% 99% alumina ceramic and zirconia ceramic
parts .
2. What kind of molding method do can you supply ?
Dry Pressing , isostatic pressing , grouting , hot-chamber die
casting , tape casting , injection molding, etc, injection molding
and isostatic molding is the most commonly used.
3.What stabilizer do you use when processing ?
Yttria stabilizer is the most commonly used in our industrial
ceramic parts.
4.Can you produce free samples for me ?
Yes usually , we can produce free samples for you but it is up to
the product complexity .
5.What terms can you accept for payment ?
T/T, L/C , Western union , Money Gram and Paypal is welcome , but
paypal and western union only for small -sum payment.
