Alfalox Bt. |
1221 Budapest |
Péter Pál u. 158/b |
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This product was developed for a Hungarian affiliated
of a multinational company on use of extreme circumstance. Applying this
product it satisfies the following requirements:
- In compliance with the application requirements in the course of the
use of the tools at 1200-1250 °C, no material evaporation causing
the contamination of the heat treated components occurs.
- Dust emission or any reaction with the ignited components occuring
in the course of the application is not allowed.
- The fireproof tool may be vacuumed.
- During the application the burning tools together with 4-5 kg components
to be ignited are put from room-temperature into a furnace having 1100 °C in it, they are kept at 1200 °C for 1 hour, then they are taken out
and suddenly cooled in a gas flow. In an average the tools can bear 100-120
such ignition cycles without damage.
The basic material of the product is high purity corundum grain, out of which a mass is prepared with adding other additives to it. This mass is formed into an appropriate shape in a tool, then it is dried and burnt. The oxide composition of the material is at least 98% Al2O3. In the course of burning the material practically does not shrink (shrinking is bellow 1%), or warp, therefore a shape and dimension accurate product can be manufactured out of it. The shapes and dimensions of the objects to be produced are only limited by the shaping possibilities and the size of the furnace. The gravimetric density of the completed, burnt, shaped body is 2,7-2,9 g/cm3. The highest temperature, thermal schock free application of our fireproof tools was calcining aluminous earth, cataliysting with Fluor on 1800 °C.
Our technology is suited for producing small series (1.000 pcs/year magnitude) of burning tools.
Our applied technology for the production of high purity
alumina is suitable to tune the characteristic of the pruduct (specific
surface, average grain size, mineral composition).
From the base material we produce different Al2O3s,
gamma- and alfa aluminiumoxide and the different kind of mixture of these
materials. We can change
the specific surface of the product between 5-150 m2/g. The purity of
the product measured by spectrograf and ICP spectrometer is above 99.96%,
and the amount of pollutant components are max. 10 ppm magnitude. During
production from the base materials with high purity and using a small
amount of mineralizing additive we produce our basic material for ceramic
purposes (e.g. production of bioceramics and high valued oxidceramic
components). It is also possible to add different additives to the aluminiumoxid,
in a preciselly controlled way.
One of the calciumphosphate base material produced by us is pure hidroxi-apatit ( Ca5(PO4)3OH ). This product was developed for bioceramical purposes and we got analyzed one sample of this material for trace elements. The results are presented bellow:
| Hidroxiapatit percentage Ca5(PO4)3OH | 100 % |
| Ca content | 39,6m% |
| P content | 18,4m% |
| Ca/P rate | 1,66 |
Toxic elements |
According to ASTM I 1185-88 |
In our sample |
As |
3 µg/g |
< 0,3 µg/g |
Cd |
5 µg/g |
< 2,0 µg/g |
Hg |
5 µg/g |
< 1,0 µg/g |
Pb |
30 µg/g |
< 0,3 µg/g |
All heavy metal |
50 µg/g |
24,4 µg/g |
Cu |
- |
2,6 µg/g |
Mn |
- |
3,9 µg/g |
Fe |
- |
0,1 µg/g |
We also produce an other product for bioceramical purposes,
too: It contains mainly tricalciumphosphate ( Ca3(PO4)2 beta-whitlockit
according to mineralogy). The toxic elements content of this material
is the same presented above for the hidroxi-apatit. Changing
the production
conditions the amount of hidroxiapatit in the material may vary between
3-100%, the amount of beta-whitlockit may vary between 0-97%. We
can control the amount of the ingredients
within the confines of a specific zone.
We can produce this beta-whitlockit as a fine powder, or as a specific
size of granule according to requirements.
Our technology is suitable to produce different kinds of mixtures
of the two calciumphosphate (hidroxiapatit, beta-tricalciumphosphate).
© 2003. Alfalox Bt.