POLYCRYSTALLINE SYNTHETIC JEWELRY MATERIAL (VERSIONS) AND METHOD OF ITS PRODUCTION Russian patent published in 2017 - IPC C04B35/44 C04B35/443 C04B35/622 C04B35/645 C30B28/00 C30B29/26 C30B29/28 B01J3/00 A44C17/00 

FIELD: chemistry.

SUBSTANCE: creating a polycrystalline jewelry material from coloured transparent or translucent oxide ceramics with dopants is proposed. The material consists of oxidic compounds which are represented by yttrium-aluminium garnet or magnesium aluminium spinel, for dying which ions of transition and rare earth metals: zinc, iron, vanadium, chromium, manganese, nickel, cobalt, titanium, neodymium, europium, terbium, ytterbium, holmium, erbium, thulium - are used. The method of manufacturing transparent or translucent ceramic comprises the stages of obtaining a powder mixture and annealing the components, hot uniaxial/cold isostatic pressing, hot isostatic pressing and heat treatment.

EFFECT: wider colour range of samples and possibility of obtaining colour effects caused by the activator concentration variable as per the pattern or the crystalline phases are achieved, the cost of goods is much less in comparison with the use of single-crystal material.

5 cl, 4 tbl, 2 ex