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[China]
Trade Verify
Address: Dagang Village,Dingshu Town, Yixing City,Jiangsu Province, China
Contact name:Bruce
Yixing City Kam Tai Refractories Co.,ltd |
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High temperature furnace use Cordierite refractory kiln tray 230*230*80mm
1. Description
Cordierite kiln tray is also called cordierite sagger .it is
widely used for sinter powder and ceramic.
it has the advantages of cordierite.It is very strong in high
temperature furnace,max working temperature 1250℃.
The advanced processing equipment and the production craft coupled with excellent inspecting instrument and strict production craft have ensured the good quality of our product. Meanwhile, the unceasing technical investment and the talented specialized technically personnel have been keeping the manufacturing technology always in the lead.
The saggars were used for the biscuit and the glost firing. They were expected to last for about 40 firings; each potbank made their own in a saggar making workshop. Saggars were made from fireclay, by a saggar maker and two assistants: the framemaker and the bottom knocker. The framemaker beat the clay into a sheet on a metal table using a large mallet, the mow or mawl. Using a frame he would cut it to size, sprinkle it with sawdust and wrap it round a wooden block to make the walls. The framemaker was usually an apprentice in his late teens. The bottom knocker, usually a boy in his early teens, did the same on a smaller scale, constructing the round or banjo-shaped bottom. Again the mow was used to beat the air out of the clay and flatten the sheet. The saggar maker was an experienced craftsman who paid his assistants out of his piece-work earnings: he took the bottom and the sides onto a wheel and using his thumbs joined the sides to the bottom. The greensaggars were dried and then placed on the top of bungs during the next firing of the kiln.
The unfired ceramic ware was placed in saggars and then biscuit fired, before being glazed and again placed in saggars prior to being glost fired. Ware may then be decorated, and placed on refractory bats and fired again such as in a muffle kiln.
A Saggar was a name considered sufficiently amusing for it to be featured on the television panel show What's My Line?.Whilst saggar making was a skilled craft, bottom knocking was far less skilled, consisting of beating clay into a metal ring.
2. Technical data
Deatails For Refractory kiln tray
| property | cordierite | mullite | cordierite- mullite | Mullite -- corundum | |
| Al2O3 % | ≥ 40 | ≥ 65 | ≥ 80 | ≥ 92 | |
| Fe2O3 % | ≤ 1.5 | ≤ 1.5 | ≤ 1.2 | ≤ 0.5 | |
| density g/cm3 | ≥2.0 | ≥2.4 | ≥2.6 | ≥3.7 | |
| Thermal expansion 1000 C | 2.30 | 5.0 | 6.50 | 7.8 | |
| Refractoriness C | ≥ 1580 | ≥1650 | ≥ 1750 | ≥ 1850 | |
| Thermal stability 1100 C--(cold water)times | ≥ 70 | ≥ 20 | ≥ 10 | ≥ 5 | |
| Working temperature | ≤ 1250 | ≤ 1350 | ≤ 1450 | ≤ 1500 | |
