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采用化学液相合成法制备了纳米Ｐｄ热稳定性研究表明，温度在７７３～５２３Ｋ内，样品的平均粒径ｄ与退火温度Ｔ之间服从Ａｒｒｈｅｎｉｕｓ关系，且平均粒径与退火时间ｔ之间满足经验公式ｄ＝ｋｔｎ。纳米Ｐｄ的热稳定范围Ｔ≤２５０℃。计算得到纳米Ｐｄ颗粒生长的表观激活能为０.１５ｅＶ，远比纳米复合材料的生长激活能小（约为１ｅＶ），故纳米Ｐｄ颗粒极易长大，热稳定范围非常窄。
The thermal stability of nano-Pd prepared by chemical liquid-phase synthesis method showed that the average particle size d and annealing temperature T of the sample obeyed the Arrhenius relationship and the average particle size and the annealing time t were satisfied at a temperature of 773-523K Empirical formula d = ktn. The thermal stability of nano-Pd T ≤ 250 ℃. The calculated activation energy of Pd nanoparticle growth is 0.15 eV, which is much smaller than that of nanocomposites (about 1 eV). Therefore, the Pd nanoparticles grow easily and their thermal stability is very narrow.