| 摘要 |
FIELD: chemistry.SUBSTANCE: invention relates to materials for the jewellery industry. A transparent, semitransparent or nontransparent composite nanocrystalline material based on nanosized oxide and silicate crystalline phases contains one of the following crystalline phases: spinel, quartz-like phases, sapphirine, enstatite, petalite-like phase, cordierite, willemite, zirconium, rutile, zirconium titanate, zirconium dioxide with content of ions of transition elements, rare-earth elements and precious metals of 0.001 to 4 mol%. One of the crystalline phases is additionally quartz-like solid solutions of lithium magnesium zinc aluminosilicates with a virgilite structure of the following composition, mol%: SiO- 45-72; AlO- 15-30; MgO - 0.1-23.9; ZnO - 0.1-29; LiO - 1-18; PbO - 0.1-7.0; ZrO- 0.1-10; TiO- 0.1-15; NiO - 0.001-4.0; CoO - 0.001-3.0; CuO - 0.001-4.0; CrO- 0.001-1.0; BiO- 0.001-3.0; FeO- 0.001-3.0; MnO- 0.001-3.0; CeO- 0.001-3.0; NdO- 0.001-3.0; ErO- 0.001-3.0; PrO- 0.001-3.0; Au - 0.001-1.0.EFFECT: invention increases heat resistance and reduces the coefficient of thermal expansion.2 tbl |
