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Refractory Brick

Refractory Brick Engineered for Mortar-free and Self-supporting Structures in High Temperature Cycling Environments:

Refractory Brick are engineered to satisfy your specific insulating or melting requirements and deliver long-term service. Calcia or Yttria stabilized Zirconium Oxide pressed or tongue and groove bricks stand-up to temperatures of 2000°C and beyond. Compositions Markets served include: quartz and laser crystal growth, glass, refractory metals, carbon black and high temperature furnaces.

Refractory Brick - Tongue and Groove:

Zircoa’s tongue and groove bricks are designed for the building of self-supporting structures. Their design and calcia or yttria stabilized zirconia composition makes them ideal for high temperature cycling* environments.

Using Zircoa’s tongue and groove brick eliminates line of sight radiation, and adds physical stability to the structure. Rings and circles, with an ID as small as 6" can be achieved. Applications include heat shields, furnace roofs and linings.

* Controlled heat-up and cool-down are important for long life.

Refractory Brick - Standard:

Standard refractory bricks (left) are used primarily for custom high-temperature furnace linings, supports and heat shields. Zircoa’s standard bricks withstand operating temperatures greater than 2000°C (3630°F) with capacity to spare. Quartz melting and synthetic crystal growing are typical applications.

Specifications:

Heat Transfer of Pressed Brick (Composition 1651):

Dense Brick — 4.45 g/cm3 (278 lbs./ft.3)
Hot Face — 5 hours exposure at 1980°C (3600°F)

51 mm (2")

Thick Brick

Hot Face

Cold Face

Cold Face Grog

No grog backup

1980°C (3600°F)

704°C (1300°F)

— —

26mm (1")

grog backup

1980°C (3600°F)

1149°C (2100°F)

538°C (1000°F)

51mm (2")

grog backup

1980°C (3600°F)

1371°C (2500°F)

427°C (800°F)


Standard Zircoa Brick Sizes (Composition 1651, 1968, 2290 & 3004:

Brick

Dimensions (approximate)

25mm (12") straight

305 x 153 x 25mm (12" x 6" x 1")

19mm (3/4") split

305 x 153 x 19mm (12" x 6" x 3/4")

64mm (9") straight

230 x 114 x 64mm (9" x 4-1/2" x 2-1/2")

51mm (2") split

230 x 114 x 51mm (9" x 4-1/2" x 2")

32mm (1-1/4") split

230 x 114 x 32mm (9" x 4-1/2" x 1-1/4")

19mm (3/4") split

230 x 114 x 19mm (9" x 4-1/2" x 3/4")

13mm (1/2") split

230 x 114 x 13mm (9" x 4-1/2" x 1/2")


Physical Properties of Various Zirconia Compositions:

Composition

1968

1651

0872

0871

0890

2290

3004

Stabilizer

CaO

(a)

CaO

(a)

CaO

(a)

CaO

(a)

Y2O3

(b)

Y2O3

(b)

MgO

(c)

Bulk Density (g/cm3)

3.3

4.2

4.1

3

4

4.5

4.6

Porosity (%)

35

25

30

40

29

23

16

Modulus of Rupture (psi)

450

2,400

1,100

800

1300

2400

3500

Coefficient of Thermal Expansion

RT-1300°C (in/in/°C)

8.2

7.3

8

7.9

9.4

5.9

2.3

Thermal Conductivity (W/m-°K) 800°C

0.68

1.2

1.2

0.52

1

1.2

1.4

a. calcia; b. yttria; c. magnesia.

Refractory Backup (Thermal Insulation):

Extend the life of your furnace, and maintain tighter control over your furnace temperatures with Zircoa’s pre-sintered grog refractory backup.

  • Zircoa Backup 1859 — Partially stabilized with magnesia and calcia. Available in -8+100 Tyler mesh size.
  • Zircoa Backup 3001 — Partially stabilized with magnesia. Available in -8+28 Tyler mesh size.
  • Zircoa Backup 10B – Calcia stabilized bubble zirconia. Available in -10+30 Tyler mesh size.