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Semiconductor-Grade Aluminas

Composition

99.5% Nom Al2O3

Description

CoorsTek Semiconductor Aluminas exhibit excellent dielectric properties, including low loss tangent. In addition, these aluminas are formulated for great mechanical and corrosion resistance performance. CoorsTek offers six semiconductor-grade aluminas optimized to meet a range of application-specific requirements. 

Download the Semiconductor Oxides Material Properties Chart

Download the Semiconductor Advanced Alumina Brochure

Columns
Property Units Value

Minor Chemistry, (Total)

ppm weight

2500-3000

Grain Size

μm

0.5-40

Flexural Strength (MOR), 3-point

MPa

379-400

Flexural Strength (MOR), 4-point

MPa

300-350

Fracture Toughness, KIc

MPa-m1/2

4-5

Hardness, Vickers 500g

GPa

16-17

Hardness, Vickers 1000g

GPa

16-17

Elastic Modulus

GPA

370-380

Coefficient of Thermal Expansion, (25°C-1000°C)

1 x 10-6/°C

8.2

Thermal Conductivity

W/m-K

30.0

Dielectric Strength, (1 mm)

ac-kV/mm

15.7-16.7

Volume Resistivity, (25°C)

ohm-cm

>1014

Volume Resistivity, (500°C)

ohm-cm

2x1015-1011

Volume Resistivity, (1000°C)

ohm-cm

2x106-107

Dielectric Constant, (1 MHz)

9.7-9.9

Dielectric Loss (tan δ), (1 MHz)

5x10-5-3x10-4

The information provided on this chart is for general material property reference only.  The customer should recognize that exact properties of materials may vary according to product configuration but close control of values of most properties can be maintained, if specified. Nothing herein is provided, or is to be construed, as absolute engineering data or constituting a warranty or representation. Contact CoorsTek for cost-effective design, development and manufacturing assistance. CoorsTek has 300+ variations including various forming and firing processes, not all variants are represented in the present website.

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