抗氧化低硫柔性石墨材料的研究

STUDY ON ANTI-OXIDIZES THE FLEXIBLE GRAPHITE IN LOW SULPHUR COMPOUND SEALS MATERIALS

针对目前石墨类密封制品抗氧化性能差,密封性能不高,易泄漏等问题,选用高锰酸钾和浓硫酸作混合氧化剂,三氯化铁作催化插入剂,少量过氧化氢作催化剂,采用半固相浸渍法制备膨胀石墨,再将其用蔗糖硼酸脂溶液浸渍、脱水、低温干燥、高温膨胀后压制成高抗氧化低硫柔性石墨复合密封材料。制品含硫量低于5.0×10-4,抗氧化能力增强一倍以上,在预紧力70MPa,介质压力10.0MPa的情况下泄漏率小于0.0001。研究结果表明采用这种新工艺可以改善石墨复合密封材料性能,从而更好地满足使用要求。

Aiming at current graphite seals completely the ware anti-oxidizes the function bad,seal completely the function not high,leak iness problems choose to use the potassium premanganate to make the oxidizing agent mixed with the oil of vitriol,irons trichloride make the catalyst inserts,jot hydrogen pero-xide make the catalyst,adopting the half solid phase to impregnating made the expansible graphite.At will its impregnation with the cane sugar boric acid grease aqua,dehydrate,the low temperature is dry,the heat inflation inhibits formed the high anti-oxidizes the flexible graphite in low sulphur compound seals materials,The product to contain the sulphur lower than 5.0×10^(-4)?the anti-oxidizes the ability strengthen a times are above,leaking the rate under the situation of lying quality pressure 10.0 MPa smaller 0.0001.Research result express adoph this kind of new craft can improve the graphite seals materials function,from but betterly satisfy usage request.