| 摘要 |
1421708 Double sulphides; phosphorous compounds SIEMENS AG 17 May 1974 [1 June 1973] 22244/74 Heading C1A [Also in Divisions H1 and C7] A ternary substance comprises a compound of a metal selected from iron, cobalt and nickel with two elements selected from phosphorus, arsenic, antimony, bismuth, sulphur, selenium and tellurium. In one example of producing CoPS powder, Co powder was mixed with NaF powder and P 2 S 5 powder in a quartz ampoule. The ampoule was evacuated, sealed and heated for 16 hours at 650‹C.The resultant CoPS powder was washed in distilled water to dissolve out the NaF and the powder dried. In another example, CoAsS powder was formed by mixing Co powder with NaF powder and introducing the mixture together with AS 2 S 3 powder into a quartz ampoule. The ampoule was evacuated, sealed and heated for 24 hours to 650‹ C. The resultant AS 2 S3 powder was washed in distilled water to remove the NaF powder. |
