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关于温度及稳定性,提供如下材料作参考 How stable is Fluorilon-99 to aging? Under 'normal' conditions, Fluorilon-99W, as with any sintered PTFE product, will have indefinite stability. The only causes of instability are contaminants introduced into the material from the environment in which it is used. Advanced aging studies on sintered PTFE such as Fluorilon™ have indicated stability in excess of 100 years. What kind of effects happen with temperature/reflectance? Does high or low temperatures cause any difference? Sintered PTFE such as Fluorilon has been used extensively as a standard for spectrophotometers and spectroradiometers in low-earth orbit space platforms. Under such conditions, it experiences temperatures from about 4K to about 450K. While the expansion and contraction of the material may cause minor changes in reflectance, there are no literature citations (and the literature is extensive) that indicates that there IS a change. |