DE332578C - Process for the production of a slightly liquid, porcelain-like, ceramic mass - Google Patents

Description

f "BLIOTHEEK" l

c-: rf. \

Π-V

ISSUED
FEBRUARY 8, 192!

The subject of the present invention is a process for producing a melting mass "of porzellanartigem, ceramic character, which can be such as glass verarbetten, but this is far superior in the stability, resistance g ^ gcu temperature changes and mechanical strength.

Characteristic of the new mass is a ίο particularly high content of fluorine compounds, Fluorocarbon. The one from the backfill of alkali lime glass, namely from Silicic acid, lime and suitable alkali compounds existing basic mass is »5 a large addition of fluorspar, at least equal to the silica content, was added.

And this high addition of river spar, which has not previously been used in actual glasses, i • μ completely changes the properties of the ·. Enamel. On the one hand, he creates the greatest Thin liquid, but on the other hand it highlights the unfavorable properties of glass, which . Sensitivity to temperature changes and shock. From the actual glass an easily processed enamel with a ceramic character is created, stalt.

For example, the following mixture is suitable:

100 parts by weight of sand,
30 - calcined soda,

50 - lime,

100 "fluorspar.

The lime is advantageous here not as carbonate, but as burnt lime introduced.

Instead of sand, silicate rocks can also be used to a greater or lesser extent or appropriate ashes or slag are taken.

The melting process is to be managed in such a way that the fluorine content is retained in the melt remains, which, by the way, is easy due to the natural properties of the new enamel is possible. This melts easily, immediately becomes thin and liquid, rises and foams does not melt and therefore does not require any refinement. Once the melt flow has occurred, processing can therefore take place immediately, since the mass is bubble-free remain.

This is done in the simplest way by casting, and especially by deformation the new fusible mass is so superior to glass. But it also towers over all similar ones Enamel masses for casting processing was considered because the Resistance to temperature changes is quite unusual. The cast Devices do not need to be cooled down particularly slowly.

The products show a cloudy, opaque appearance. You let yourself Easily produce in a wide variety of colors and veins, as the new enamel is very receptive to coloring metal oxides.

232-

The devices not only withstand severe cooling during production, but also also repeated heating and cooling. The new crowd appears as a result for j cooking pots vbrbestimMtf ·

Done ^ ;; i $, t _Ä ; jpej ^ Tn ^ higher temperature

StandfeW and "Bef" ordinary temperature Insensitive to impact, very pressure-resistant and puncture-proof against high voltage electric currents.

Accordingly, the compound can also be used for insulators and electrotechnical installation items.

In terms of expansion, hardness and density, the mass corresponds, as at the beginning said, porcelain.- Compared with porcelain, however, there is an enormous advantage; that the design of the devices as a result of the deformation of the slightly liquid> Mass by potting is much cheaper.

It is already known to produce cloudy glasses using fluorspar, but these are small additional amounts, at least not even remotely as high as the new masses. On the other hand, there is also the preparation of an artificial one Marble from melting fluorspar unusual

and gypsum or calcium carbonate with the addition of clay. Silicic acid and alkaline earths have been suggested. What was lacking here was that the relationship between fluorspar and silicic acid is the decisive factor and that a high addition of fluorspar is in particular
Properties.

Claims (2)

Patent Claims: i. Process for the production of a slightly liquid, but stable and porcelain-like, ceramic ones that are highly resistant to changes in temperature Mass of particular strength, characterized in that alkali-lime glass offset mixed with a large amount of fluorspar, at least equal to the silica content, and melted it will. 2 .. embodiment of the method according to claim 1, characterized by more or less large replacement of the sand by silicate rock, or ash Slag.