以热高分油为原料,甲苯不溶物含量为考察指标,考察样品质量、滤膜孔径、甲苯温度、甲苯用量对热高分油甲苯不溶物含量的影响。在单因素考察的基础上,采用响应面法和正交设计对比研究热高分油甲苯不溶物含量测定的最佳条件。结果表明,热...以热高分油为原料,甲苯不溶物含量为考察指标,考察样品质量、滤膜孔径、甲苯温度、甲苯用量对热高分油甲苯不溶物含量的影响。在单因素考察的基础上,采用响应面法和正交设计对比研究热高分油甲苯不溶物含量测定的最佳条件。结果表明,热高分油甲苯不溶物含量的最佳测定条件为:称样量0.5 g,滤膜孔径0.22μm,甲苯温度选择70℃、甲苯用量350 m L。展开更多
Development of gas turbine oils that can be used in higher temperature conditions remains the greatest technological challenge. Though the maximum operating temperature of conventional lubricating oils is generally se...Development of gas turbine oils that can be used in higher temperature conditions remains the greatest technological challenge. Though the maximum operating temperature of conventional lubricating oils is generally set around 100 ℃, or 140 ℃ for scavenged oils, it is predicted that the future will require oils to function at 200 ℃ or above. To find a clue to developing oils that can be used at higher temperatures, this study attempted to estimate service lives and operating temperature ranges of certain oils, including oils conforming to MIL-PRF-23699, which are deemed promising candidates for high-temperature applications, by analyzing their reaction rates of degradation and degeneration by oxidation. Among a number of methods used in the analyses of reaction rates, this study chose thermo-gravimetry （TG）, with which estimations can be made relatively easily.展开更多
文摘以热高分油为原料,甲苯不溶物含量为考察指标,考察样品质量、滤膜孔径、甲苯温度、甲苯用量对热高分油甲苯不溶物含量的影响。在单因素考察的基础上,采用响应面法和正交设计对比研究热高分油甲苯不溶物含量测定的最佳条件。结果表明,热高分油甲苯不溶物含量的最佳测定条件为:称样量0.5 g,滤膜孔径0.22μm,甲苯温度选择70℃、甲苯用量350 m L。
文摘Development of gas turbine oils that can be used in higher temperature conditions remains the greatest technological challenge. Though the maximum operating temperature of conventional lubricating oils is generally set around 100 ℃, or 140 ℃ for scavenged oils, it is predicted that the future will require oils to function at 200 ℃ or above. To find a clue to developing oils that can be used at higher temperatures, this study attempted to estimate service lives and operating temperature ranges of certain oils, including oils conforming to MIL-PRF-23699, which are deemed promising candidates for high-temperature applications, by analyzing their reaction rates of degradation and degeneration by oxidation. Among a number of methods used in the analyses of reaction rates, this study chose thermo-gravimetry （TG）, with which estimations can be made relatively easily.
