الخصائص الحرارية و اللونية للرمال السوداء في خلطات التزجيج

الملخص EN

The study aim to identify the thermal and colour properties of black sand sample from the area of Trnikitat , north of Tukar city in Eastern Sudan .

The study was follow up practical method, standard equipment were used .The sample underwent numerous experiments in order to determine its specifications for gasification glaze mixes to see if it may be considered as a mineral - rich material for inclusion in ceramic production and this mention to the importance of this study .

The sample was test by XRF fluorescence, delineating its constituent components and their specific gravity and particle size .

The sample was ground in a ball mill, then passed through a ISO micron sieve.

It was added to glaze mixtures in recorded amount and fired to between 1050° to 1220°C.

It was found that black sand gives glazes grades of color ranging from yellowish brown to black, depending on the amount of color - altering oxides present.

The study concluded that the black sand sampled re -enforces crystallization and gives a nice coloring to glazes.