*mydirectindustry

ZAL-15

Product catalog summary

General Information
ZIRCAR Ceramics’ Alumina Type ZAL-15 is a low-density, rigid refractory structure made from high-alpha polycrystalline alumina fibers and high-purity inorganic binders. It is an excellent thermal insulator with precision machinability, suitable for continuous use up to 1550°C (2822°F) and intermittent use up to 1650°C (3002°F). ZAL-15 is characterized by high electrical resistivity, transparency in microwave and RF fields, and high reflectance. It is resistant to chemical attack but can be affected by hydrofluoric acid, phosphoric acid, and strong alkalis.

Characteristics & Properties

Composition: 85% Al2O3, 15% SiO2
Density: 0.24 g/cc (15 pcf)
Maximum Use Temperature: Continuous 1550°C (2822°F), Intermittent 1650°C (3002°F)
Linear Shrinkage: 1% at 1550°C, 3% at 1650°C
Thermal Expansion Coefficient: 5.0 x 10-6/°C
Melting Point: 1870°C (3392°F)
Open Porosity: 93%
Specific Heat: 1047 J/kg°K
Compressive Strength: 1.1 MPa at 10% Compression
Flexural Strength: 1.6 MPa at 25% Strain
Thermal Conductivity: Ranges from 0.06 W/m°K at 250°C to 0.25 W/m°K at 1350°C

Suggested Applications
ZAL-15 is recommended for use as thermal insulation in furnaces and thermal process systems, precision-machined insulation in scientific instruments, reflector tiles in infrared equipment, high-temperature setters, supports, process fixtures, and electrical insulation in high-temperature systems.

Availability
Standard boards are available in various sizes and can be ordered online or specified by item number. Custom boards and shapes are also available, with options for surface treatments such as rigidization or coating.

Ordering Information
Standard boards are available for immediate shipment, with tolerances of +/- 1/8” on length and width and +/- 1/16” on thickness. Custom shapes and sizes can be manufactured using advanced machining techniques.

Note
The data provided is intended to assist in determining the suitability of the material for specific applications and should not be used for preparing specifications.

Catalog excerpts

Alumina Type ZAL-15Characteristics & Properties Continued Flexural Strength**, MPa (psi) at 25% Strain The data presented herein is intended to help the user to determine the appropriateness of this material for their application. This data is a nominal representation of this product's properties and characteristics and therefore should not be used in preparing specifications. * Maximum use temperature is dependent on variables such as stresses, both thermal and mechanical, and the chemical environment that the material experiences. ** Properties expressed parallel to thickness. f Properties...

Open the catalog to page 2

ZAL-15

ZAL-15

Catalog excerpts

All ZIRCAR Ceramics catalogs and technical brochures