Preparation method of high-density silver tin oxide electric contact material

• Main Authors: FAN YUZHUO, LI GUIJING, FENG WENJIE, HAN XINLEI
• Format: Patent
• Language: Chinese; English
• Published: 19.07.2024
• Subjects: ALLOYS; CASTING; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; METALLURGY; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WORKING METALLIC POWDER

The invention provides a preparation method of a high-density silver tin oxide electric contact material, and belongs to the technical field of electric contact materials, and the preparation method comprises the following steps: S01, mixing Ag powder, SnO2 powder and CuO powder, carrying out ball milling treatment, and then pressing into a blank; s02, the blank is subjected to high-vacuum high-temperature sintering, the sintering temperature ranges from 700 DEG C to 850 DEG C, and CuO is subjected to a thermal decomposition reaction; s03, the sintered blank is put into a mold, high-temperature re-pressing and pressure maintaining are conducted under the high vacuum condition, the temperature range of high-temperature re-pressing is 700-800 DEG C, the pressure range of high-temperature re-pressing is 100-200 MPa, and the pressure maintaining time is 5-20 minutes; and S04, releasing the pressure and cooling along with the furnace to finally obtain the high-density Ag-SnO2 electric contact material containing t