SI-HARD SILICA RIGIDIZER HARDENER

(PDF VERSION)

GENERAL INFORMATION

ZRCI SI-HARD Rigidizer Hardener is a alkaline, aqueous dispersion of colloidal silica at 50% concentration. The dispersed silica is present as amorphous spheres, 100 nanometers in size. The silica present is non-agglomerated and is completely dispersed. There is no mixing or dilution required. The particles carry a slightly negative charge and have a large surface-to-weight ratio.

It is used for rigidizing and hardening the surfaces of ZIRCAR ceramic textile, papers and blankets. It also is ideal as a coating agent and binder. 

SI-HARD is easily applied by brushing, rolling, dipping, sponging or spraying. It is non flammable and is not affected by freezing. Coverage depends upon the desired hardness. 

SI-HARD should be stored at temperatures between 5C (41F) and 32C (90F) to prevent irreversible precipitation of the silica.

Drying of treated parts can typically accomplished at temperatures of 150C for one hour.

SUGGESTED APPLICATIONS


SI-HARD is used as a strengthening agent for ZRCI Refractory Sheet Products including:

CHARACTERISTICS & PROPERTIES

 

Silica, wt. %

50

Color

White

Particle Size (nm)

100

pH

9

Specific Gravity

1.4

Viscosity, cP

15

Stabilizing Ion

Ammonium

Na2O, %

~0.12

Surface Charge

Negative

 

SUGGESTED APPLICATIONS

  • Coating surfaces of ZRCI textile, blankets and papers for improved hardness, abrasion & chemical attack resistance.

  • Forming of shapes (rigid tubes, boats, setters, supports, process fixtures etc.) by rigidization of flexible ZRCI materials.

  • Bonding agent in manufacture of ceramic fiber containing refractories, composites and laminates.

 

AVAILABILITY

tem # Description 1 - 9 10 - 25 26+
LS50 SI-HARD, 1 Gallon Bucket $49 $47 $44
LS51 SI-HARD, 5 Gallon Bucket $166 $158 $149

PRICES ARE SUBJECT TO CHANGE WITHOUT NOTIFICATION AND ARE SUBJECT TO ZIRCAR REFRACTORY COMPOSITES, INC. TERMS AND CONDITIONS. ALL PRICES ARE F.O.B. FLORIDA, NY AND ARE IN U.S. DOLLARS

HOME

ZIRCAR REFRACTORY COMPOSITES, INC.
P.O. BOX 489
FLORIDA, NEW YORK 10921
TEL: 845-651-2200, FAX: 845-651-1515

email: sales@zircarchina.com

This information, which is subject to change, is offered solely for your consideration and should not be taken as a warranty or representation for which we assume legal responsibility. It is not to be understood as permission or recommendation to practice a patented invention without a license and the user should determine whether relevant patents exist.

Copyrights and trademarks are the property of  ZIRCAR Refractory Composites, Inc.
 for technical problems viewing these pages, please contact
sales@zrci.com