High Temperature Crucibles
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High Temperature Crucibles |
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Accumet
Materials, Co. offers a wide range of ceramics, graphite, quartz and corrosion
resistant metals used to
produce crucibles, trays, lids, furnace furniture and lab-ware for use in
extremely corrosive laboratory environments
to 2000 ° C.
Accumet’s
materials provide exceptional performance during heat treating, calcining,
metal processing, glass
processing, electron beam liners and other high temperature processes found in
laboratories and industry.
These dense, pore-free ceramics are gas tight and extremely resistant to high
temperatures in both oxidizing
and reducing atmospheres.
A broad
range of ceramic materials are available in standard circular dishes,
combustion boats, rectangular trays,
lids, crucibles and rods. Accumet has many sizes already tooled which will
reduce cost and delivery time.
MATERIAL PROPERTIES
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MAX. TEMP(°C) |
THERMAL CONDUCTIVITY W/m-K @ R.T. |
THERMAL SHOCK RESISTANCE ΔT (°C) |
TENSILE STRENGTH MPa @ R.T. |
Electrical Resistivity Ω-cm @ R.T. |
RESISTANCE TO ACIDS, ALKALIS AND SALTS |
Description |
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ALUMINA |
1950 |
29-23 (20-100 °C) |
200 |
260-300 |
>1014 |
Excellent |
Exhibits dimensional strength, temperature, chemical and wear resistance |
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ALUMINA-TITANIA |
1900 |
33-28 (20-100 °C) |
>1000 cycles |
225 |
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Very good |
Exhibits excellent thermal shock resistance because of its low thermal expansion and good mechanical strength. |
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ALUMINA-ZIRCONIA |
2000 |
26-18 (20-100 °C) |
1000 cycles |
260 |
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Very Good |
Exhibits high fracture toughness, excellent wear and erosion resistance |
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CORDIERITE |
1000 |
3.0 |
500 |
25.5 |
1014 |
Very Good |
Excellent chemical, and good thermal shock resistance |
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GRAPHITE |
3650 (inert atm) |
24 |
200-250 |
4.8 |
7 x 10 -3 |
Very Good |
High temperature resistance in inert atmosphere |
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MAGNESIA |
1200 |
8-32 |
400 |
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Very good |
Good thermal conductivity |
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MULLITE |
1700 |
3.5 |
300 |
103.5 |
1013 |
Good |
Good thermal shock resistance, good mechanical strength at high temperatures |
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QUARTZ |
1200 |
1.4 |
>1400 |
48 |
6 X 1010 |
Good |
Excellent thermal shock resistance |
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Clay-Bonded SiC |
1400 |
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Good |
44 |
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Excellent thermal shock resistance |
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Zircon |
1500 |
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Very Good |
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Good |
90% Zr ; Cost less than pure Zirconia |
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ZIRCONIA |
2000 |
2.7 |
280-360 |
248 |
>1013 |
Very Good |
Excellent mechanical and high temperature resistance |
In addition to our standard line, Accumet can supply custom size crucibles and other forms to customer specifications. For a prompt quotation, call, fax, e-mail or write your requests and include dimensions, tolerances and description of the application. Our engineers will recommend the material best suited for your application.
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Accumet Materials also offers standard and fabricated metal crucibles, including platinum and tantalum. Graphite EB Crucibles also available – contact us for additional information. |
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