提出应用3ω谐波探测技术进行脲醛树脂-石蜡相变微胶囊的有效吸热系数的测量方法.测试了跨越相变温度区间的微胶囊有效吸热系数,分析了有效吸热系数随温度的变化关系.在其相变温度区间内,有效吸热系数存在极大值,该极值点对应的温度与其相变温度峰值一致.
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