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AmAlOx 68 (99.8% alumina)

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AmAlOx 68 Alumina - Aluminum Oxide Ceramic

AmAlOx 68 alumina (Astro Met Aluminum Oxide) is a high purity 99.8% aluminum oxide (alumina) ceramic which has been developed and optimized for maximum wear resistance and corrosion resistance. A high density, diamond like hardness, fine grain structure and superior mechanical strength are the unique properties that make AmAlOx 68 alumina the material of choice for a wide range of demanding applications. AmAlOx 68 alumina provides a cost-effective, engineered material solution in applications that require the optimum in wear resistance, corrosion resistance, high temperature stability, low thermal expansion, high stiffness to weight ratio, high dielectric strength and biocompatibility. Astro Met, a full service advanced ceramics manufacturer, produces both as-fired and precision machined AmAlOx 68 alumina components to customer requirements in both prototype and production quantities. The successful use of AmAlOx 68 alumina components in numerous industries have enabled Astro Met customers to solve existing problems and develop new products and processes that otherwise would not have been possible with conventional engineering materials.

AmAlOx 68 Alumina Properties

Typical Properties
Units
Value

Composition

wt%

99.8% Alumina

Color

---

White

Bulk Density

g/cm3

3.93

Water Absorption

%

0

Gas Permeation

%

0

Grain Size

Microns

4

Hardness (Vickers)

HV

2017

Flexural strength

MPa (psi · 103)

382 (55)

Modulus of Elasticity

GPa (psi · 106)

393 (57)

Fracture Toughness

MPa · m 1/2

5

Poisson's Ratio

---

0.22

Thermal Expansion (25°C - 1000°C)

10-6/°C (10- 6/°F)

8.2 (4.6)

Thermal Conductivity

Btu · in/ft2 · h · °F

260

Specific Heat

cal/g · °C

.021

Maximum Temperature Use (no load)

°C (°F)

1700 (3092)

Dielectric Strength
ac-volts/mils
230
Dielectric Constant
---
9.7

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9974 Springfield Pike
Cincinnati, OH 45215
Phone: 513-772-1242
Fax: 513-772-9080