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Coarse Grain Tubes
Coarse grain tubes

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Pressed or Cast Zirconium Oxide Compositions Engineered for High Temperature Cycling Environments

Calcia, Yttria or Magnesia stabilized coarse grain tubes are manufactured in various grain sizes, mass and shapes to satisfy your specific application and deliver long-term service. Markets served include: non-reactive firing of electronic components and crystal growing.

Composition 1651

Tubes made of composition 1651 are typically used for high temperature induction heated crystal growing furnaces. 1651 is composed of zirconia, stabilized with 3.5% calcia by weight. These tubes will survive repeated cycling from room temperature to 2000°C (3632°F), when used with Zircoa backup material. Please contact us to discuss your specific needs.

 

Specifications

MSDS for Coarse Grain Tubes

Follow the composition number links for the corresponding MSDS.Visit our Website (www.zircoa.com/msds) to download the MSDS for this product's compositions.

Standard Sizes of Coarse Grain Tubes

Dimensions
OD ID
mm inches mm inches
38.1 1.50 25.4 1.00
38.1 1.50 12.7 0.50
50.8 2.00 38.1 1.50
50.8 2.00 31.7 1.25
50.8 2.00 25.4 1.00
63.5 2.50 50.8 2.00
63.5 2.50 44.4 1.75
63.5 2.50 38.1 1.50
69.8 2.75 57.1 2.25
76.2 3.00 63.5 2.50
76.2 3.00 50.8 2.00
88.9 3.50 76.2 3.00
88.9 3.50 63.5 2.50
92.2 3.63 79.5 3.13
101.6 4.00 88.9 3.50
101.6 4.00 76.2 3.00
114.3 4.50 101.6 4.00
(MORE)
(CONTINUED)
Dimensions
OD ID
mm inches mm inches
127.0 5.00 114.3 4.50
127.0 5.00 101.6 4.00
152.4 6.00 139.7 5.50
152.4 6.00 127.0 5.00
177.8 7.00 152.4 6.00
190.5 7.50 171.4 6.75
222.2 8.75 196.8 7.75

Physical Properties of Various Zirconia Compositions

Composition 1968 1651 872 871 890 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 (www.zircoa.com/grog).