| 简介 |
The invention can be used in the chemical industry. The heat-resistant synthetic jewellery material comprises a transparent, semitransparent or nontransparent composite nanocrystalline material on the basis of nanosized oxide and silicate crystalline phases. The material comprises at least one of the following crystalline phases : spinel, quartz-like phases, sapphirine, enstatite, petalite-like phase, cordierite, willemite, zirconium, rutile, zirconium titanate, zirconium dioxide with a content of ions of transition elements, rare-earth elements and precious metals of from 0.001 to 4 mol%. One of the crystalline phases is additionally quartz-like solid solutions of lithium magnesium zinc aluminosilicates with a virgilite or keatite structure. The composition is selected from the following components, in mol% : SiO2 - 45-72; Al2O3 - 15-30; MgO - 0.1-23.9; ZnO - 0.1-29; Li2O - 1-18; PbO - 0.1-7.0; ZrO2 - 0.1-10; TiO2 - 0.1-15; NiO - 0.001-4.0; CoO - 0.001-3.0; CuO - 0.001-4.0; Cr2O3 - 0.001-1.0; Bi2O3 - 0.001-3.0; Fe2O3 - 0.001-3.0; MnO2 - 0.001-3.0; CeO2 - 0.001-3.0; Nd2O3 - 0.001-3.0; Er2O3 - 0.001-3.0; Pr2O3 - 0.001-3.0; Au - 0.001-1Ø The invention makes it possible to produce a jewellery material with a low coefficient of thermal expansion and a high degree of heat resistance. |
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