DE627730C - Process for the production of colored glasses like the Truebglaeser - Google Patents

Description

Process for the production of colored glasses in the manner of opaque glasses For every homogeneous, translucent body you can find a curve which illustrates the relationships between refractive power and wavelength (color).

If a body consists of a mechanical mixture of two bodies (phases), whose refraction curves have a common point, d. H. intersect so, when looking through it, it will show the color that corresponds to the position of the common point corresponds within the spectrum, while all other colors by the irregular Contact surfaces of the two phases, which are only mechanically mixed, are scattered, putting the non-contiguous phase in the contiguous in the form of numerous it contains fine to microscopic drops, spheres or crystals.

To glasses of a certain see-through color, e.g. B. blue, to get, one chooses phases whose light refraction curves have their common point in blue. Because the course of these curves usually depends on the chemical composition of the Depending on the individual phases, you have it in your hand; by changing these compositions create any see-through color, even ultraviolet and ultraviolet.

In this case, the following composition is selected according to the invention 88.9% Si02 8.3% Na2O @@@ 33.0% PbO @ 14, q.% Ca3 (P.04) 2 @ i @ 5.4% Sb205 or 46.6% Si02 94% Nag 0 @ z I, 6% Pb 0 @@@@ I6,30 / 0 Ca3 (P04) 2 @ 6, I% 8b205. _-Between these Boundary colors are made by changing the weight ratio of individual Components produced. To change to red, PbO, T120, TiO2, Sb2 05, Ca O, Sr O, Ba O, to change towards violet Si02, B203. or to increase for turbidity CaO, Ca3 (P04) or to reduce the turbidity Na2D K2O added.

To produce the glasses are according to the present invention the substances intended for the formation of the two phases melted together, whereby designed one phase during the cooling in the other in such a way that the aforesaid uniform disjointed distribution and the optical phenomena that depend on it adjust themselves when the mass solidifies.

The difficulty of the production is based on the fact that you have to mutual solubilities and dispersion curves of the phases in question is not adequately informed and before the manufacture of the glass not any of the can deal with both phases separately; but first of all a glass according to the invention manufactured, e.g. B. a glass of the composition (green in transparency) 42.8% SiO2 @ 9.1% Na20 + 26.8% PbO @ f- i5.5% Ca3 (POj2 -f-- 5.8% 8b206, then it subsides this without difficulty both the color and the composition as desired change, insofar as this is below. Meeting the essential optical and physical Conditions is possible at all, in the following way: First will determined by changing the percentage amounts of the individual components, in what sense and extent changes in the quantity of the individual components change the color influence. Subsequently, small amounts of a new component are introduced, that only the color is thereby changed, whereupon this color change by a Change in the content of a component whose effect on the color is already known is, is reversed. This process is repeated until the desired Change in composition is achieved.

One can continue in the above manner by making changes easily get to his glass of the following composition: 45.1% SiO2 @ 5.3% Na2O @ 3I, 8% T120 @ -3.6% CaO @ I2, I% Cas (PO4) 2 2.1% Sb2O5 (purple in transparency).

The glasses produced in the above manner are suitable for decorative glasses and light filters.

Claims (2)

PATENT CLAIMS: I. Process for producing colored glasses according to Type of cloudy glass, consisting of two phases, one of which is used as a dispersant acts and is mechanically permeated by the other, the disperse phase, thereby characterized in that such a composition is chosen for each of the two phases that their dispersion curves intersect at the point of the spectrum which corresponds to the desired color of the undestroyed light passing through, while all differently colored rays are scattered by the inclined boundary surfaces of both phases will. 2. The method according to claim I, characterized in that for the production of pure ultrared or an ultraviolet glass, the raw materials are melted together in such a ratio that glasses of the composition 38.9% Si02 @ 8.3% Na2O @ 33, o% PbO @ , 14.4% Cas. (PO4) 2 @ 5.4% Sb2O5 or 46.6% SiO2 @ 9.4% Na2O @ 2I, 6% PbO @ 16.3% Caes (P04) 2 + 6, i % Sh2-05 r will be obtained while zwdsclien. These borderline colors are produced by intermediate compositions.