Lime stabilised zirconia crucibles to 2,200°C
Trusted with platinum group metals at the highest service temperature in the range. Lime stabilisation prevents volume change, so the body resists spalling and erosion through the severest heating cycles.
Key benefits
Talk to a Technical ExpertHighest service temperature
Rated to 2,200°C, the highest in the Magna range, for platinum group metal melting and refining.
Spalling and erosion resistance
Lime stabilisation prevents volume change, so the body resists spalling through the severest thermal cycles.
Volume stability
A stable crystalline structure holds its form where lesser refractories crack or distort.
Clean precious metal
A dense, non-wetting body keeps platinum group metal melts clean during refining.
Lime stabilised zirconia
A lime stabilised zirconia body for the most severe service, where lime stabilisation prevents the volume changes that would otherwise crack the refractory, allowing service to 2,200°C.
- Composition
- Lime stabilised zirconia
- Max service temperature
- 2,200°C
- Capacity range
- 0.5 to 100 kg
Applications and alloys
The choice of platinum group metal melting and refining, serving to 2,200°C where no other crucible material in the range can.
- Furnaces
- Induction and resistance melting
- Alloys
- Platinum group metals
- Above 2,000°C
- The highest service temperature in the range
Technical data
Talk to a Technical ExpertIsopressed round bottomed crucibles
| Drg No | ID | OD | IL | OL |
|---|---|---|---|---|
| 862 | 28 | 42 | 70 | 90 |
| 817 | 32 | 42 | 100 | 110 |
| 876 | 37 | 48 | 105 | 115 |
| 630 | 38 | 58 | 107 | 117 |
| 687 | 42 | 58 | 107 | 117 |
| 854 | 51 | 67 | 79 | 89 |
| 607 | 51 | 67 | 140 | 150 |
| 608 | 63 | 83 | 140 | 154 |
| 869 | 63 | 80 | 158 | 178 |
| 638 | 63 | 80 | 178 | 198 |
| 887 | 63 | 81 | 218 | 238 |
| 824 | 65 | 89 | 185 | 200 |
| 691 | 73 | 88 | 190 | 210 |
| 689 | 75 | 95 | 170 | 190 |
| 619 | 75 | 87 | 150 | 162 |
| 628 | 76 | 98 | 159 | 179 |
| 602 | 76 | 98 | 178 | 198 |
| 832 | 76 | 96 | 208 | 228 |
| 651 | 82 | 102 | 121 | 140 |
| 853 | 82 | 103 | 143 | 163 |
| 852 | 82 | 106 | 160 | 180 |
| 649 | 82 | 103 | 185 | 205 |
| 864 | 91 | 110 | 187 | 210 |
| 676 | 92 | 111 | 219 | 238 |
| 898 | 95 | 119 | 215 | 235 |
| 891 | 95 | 114 | 238 | 255 |
| 624 | 97 | 119 | 270 | 290 |
| 613 | 102 | 128 | 254 | 272 |
| 620 | 108 | 127 | 199 | 210 |
| 655 | 110 | 125 | 210 | 230 |
| 605 | 120 | 144 | 229 | 250 |
| 889 | 125 | 150 | 230 | 255 |
All dimensions in mm. Drg No: drawing number. ID: inside diameter. OD: outside diameter. IL: inside length. OL: overall length.
The measurable difference
Every crucible we make is individually inspected before it leaves the works — the same standard we have held for fifty years.
100%
Individually inspected
50 years
Manufacturing refractories in Britain
1,000 kg
Largest crucible capacity
Recommended backing mix
Browse the backing mixes
Zirconia Backing Mix
Zirconia backing mix shares the crucible's coefficient of thermal expansion, so crucible and packing expand and contract together, reducing thermal stress through the severest cycles.
Other crucibles
Browse all crucibles
Alumina Crucibles
The workhorse of the range. High purity alumina handles both air and vacuum induction melting, with the thermal shock resistance and smooth, non-wetting surface the investment caster relies on.
Super Zirconia Crucibles
Magnesia stabilised for the most demanding vacuum work. Low thermal expansion means one crucible survives pour after pour of superalloy, the reason aerospace casters specify it.
Chrome Alumina Crucibles
A small addition of chrome oxide gives the alumina body its resistance to slag attack, extending crucible life in the air melting commercial foundry.
Magnesia Crucibles
Lighter than zirconia and preferred by some customers for X-ray analysis. The magnesia body carries lower running costs than stabilised zirconia.
Frequently asked questions
Magna supplies crucibles against drawing numbers or to new dimensions. Send your alloy, furnace type and melt size with an enquiry for a specification.
Lime stabilised zirconia crucibles serve to 2,200°C — the highest in the Magna range, which is why platinum group metal refiners specify them.
Specify the right zirconia crucible
Send the alloy, volume and process you're working with, and our technical team will confirm the drawing number or specify a new size.
- Reply from a technical specialist within one working day
- Drawings and specifications welcome
- No obligation