Diopside sealing material as well as preparation method and application thereof

• Main Authors: ZHAO ZHILONG, LI QING, QI YAN, GUO ZHISHENG, FU SHAOHUI, LI HERAN, LI GANG
• Format: Patent
• Language: Chinese; English
• Published: 02.07.2024
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; ELECTRICITY; GLASS; JOINING GLASS TO GLASS OR OTHER MATERIALS; MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES; METALLURGY; MINERAL OR SLAG WOOL; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS

The invention relates to the field of solid oxide fuel cell sealing materials, and discloses a diopside sealing material and a preparation method and application thereof.The preparation method comprises the steps that 1, a combined material containing SiO2, CaO, MgO, Al2O3, K2O, ZnO, B2O3, SrO and Na2O is sequentially subjected to primary melting treatment and secondary melting treatment, and a glass melt is obtained; (2) sequentially carrying out water quenching and ball milling on the glass melt to obtain glass powder; (3) contacting and mixing the glass powder with an organic solvent to obtain glass slurry; and (4) coating the surface of a connecting piece with the glass slurry, and then sequentially carrying out nucleation treatment and crystallization treatment to obtain the diopside sealing material. The diopside sealing material can separate out diopside crystals of a short columnar single crystal phase, and meets thermal expansion matching of fuel cell sealing; and the diopside sealing material has a