DESCRIPTION
Maryland Ceramic & Steatite Brand Porous Structures are porous engineering materials consisting of tiny, precisely-sized spherical particles bonded together to form rigid three-dimensional shapes having an evenly distributed network of interstitial pores which are of uniform size, completely open and interconnected. Porous structures are manufactured using a patented process, which permits the exact reproduction of specified pore size, pore distribution and physical dimensions, regardless of quantity ordered over time.
USES
Maryland Ceramic & Steatite Brand Porous Structures are ideally suited for a wide variety of applications involving filtration, aeration, oxygenation and fluidization — to name a few. They are intended for use wherever high rates of gas transfer into liquids, low back pressure, precisely controlled/evenly distributed flow rates or other desirable performance characteristics of uniform porosity are required.
AVAILABILITY
Maryland Ceramic & Steatite Brand Porous Structures are available in flat sheets, hollow tubes, solid rods and an almost limitless variety of simple or complex/compound custom molded shapes to meet your design specifications. The following standard grades are normally stocked. Grade designations used to identify Maryland Ceramic & Steatite Brand Porous Structures also denote the maximum interstitial pore diameter in microns (ASTM 128-61). Coarser and finer grades available upon request from Maryland Ceramic & Steatite.
GRADE DESIGNATION
| (Product I.D. No.) | Description |
| 15 | Very Fine |
| 40 | Fine |
| 55 | Intermediate |
| 90 | Coarse |
| 175 | Very Coarse |
AVERAGE PHYSICAL PROPERTIES
A. Particle Retention (as filter medium)
Microns
| Grade | Absolute | Nominal |
| 15 | 15 | 8 |
| 40 | 40 | 20 |
| 55 | 55 | 28 |
| 90 | 90 | 45 |
| 175 | 175 | 90 |
B. Flexural Strength — (ASTM D-790)
From 1,500 to 4,500 psi depending upon Grade.
C. Compressive Strength — (ASTM D-695)
From 3,000 to 9,000 psi depending upon Grade.
D. Void Volume — 30%
E. Heat Resistance —
250°F Continuous, 450°F Maximum (May be Autoclaved)
F. Coefficient of Thermal Expansion
10.8 x 10-6 in./in.°C from 0-400°F
G. Dielectric Strength —
From 49 V/mil to 73 V/mil depending upon Grade.
H. Bulk Density — (ASTM C-20-73)
1.6 grams/cc
I. Chemical Resistance —
No effect after 2 years immersion at 73°F in a wide variety of solutions.
