Zero-expansion material

• Main Author: XIANRAN,CHEN XING
• Format: Patent
• Language: English
• Published: 14.11.2007
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TREATMENT OF NATURAL STONE

This invention relates to a not expanding material used at minus 140 to 700 deg, belongs to non-metal material region. The invention takes PbO, TiO2, Bi2O3, Fe2O3 and ZnO as precursor, utilize high temperature solid phase method to prepare ( 1 - X - Y) PbTiO3 - xBiFeO3 - yBi ( Zn1 / 2Ti1 / 2) O3 powder body, require the X is not less than 0.0 and not greater than 0.2, and Y is not less than 0.0 and not greater than 0.4; accordingly weigh the PbO, TiO2, Bi2O3, Fe2O3, and ZnO, then ball mill in ethanol solution for 1 to 48 hours for intensive mixing, drying and squashing to make sheet, calcining at 700 to 1300 deg for 1 to 24 hours, the offspring after calcining ball mill at ethanol solution for 1 to 48 hours, then drying again and squashing for sheet, calcining at 800 to 1300 deg for 1 to 48 hours, cooling, the finished product after grinding is zero expanding material PbTiO3 - BiFeO3 - Bi ( Zn1 / 2Ti1 / 2) O3.