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一、银石棉的制备:将1克石棉绒放在4毫升饱和碳酸铵溶液中浸透,压去多余的溶液,将其放入4毫升30％硝酸银溶液中,随即可以观察到在石棉绒上生成淡黄色的碳酸银沉淀,同时有气泡产生。待反应完毕,用蒸馏水洗涤附在石棉绒上的沉淀两三次,压去水分,放在蒸发皿中加热分解,此时附着于石棉绒上的碳酸银首先分解成黑色的氧化银,再继续分解成灰色的银细粒,适当将此石棉绒拉松,即为银石棉。
1. Preparation of silver asbestos: Soak 1 g of asbestos in 4 ml of saturated ammonium carbonate solution, press off excess solution, place it in 4 ml of 30% silver nitrate solution, and observe it on asbestos immediately. A pale yellow precipitate of silver carbonate is produced, and bubbles are generated at the same time. After the reaction is completed, the precipitate attached to the asbestos is washed with distilled water two or three times, and the water is pressed and heated to decompose in an evaporating dish. At this time, the silver carbonate adhered to the asbestos is first decomposed into black silver oxide, and the decomposition is continued. Grayish silver fine particles, appropriately loose this asbestos wool, is silver asbestos.