tivatedclayareofhigherthickeningeff— cieneyforNa2S203·5H2O-CaSe4·2H2Owiththesamedosageofthickeningagent;(3)Na2S2O3‘5H2Omodi— fledwithCaSe4·2H2Oandactivatedclayachievesthecrystallizationandreleasesthermalenergyatabove27℃, withthehighestexothermietemperaturevaryingfrom43to48cICandwithanexothermicdurationbeingmorethan 80min;(4)Na2S203·5H20modifiedwithnaphthol-NaC1possessesgoodstabilityandisofaphase—changetem— peraturevaryingfrom41to46cICatdifferenttimesofheatstoring—releasingcirculation.andtheheatreleaseeven lastsformorethan70rain;and(5)thephasechangeenthalpyofmodifiedNa2S2O3·5H2Ovariesfrom150to 180J/g.ursinthethermalstorage/releaseprocess. Keywords:phase—changethermal—storagematerial;sodiumthiosulfatepentahydrate;modification;naphthol;cal— ciumsulfatedihydrate;nucleatingagent;thickeningagent
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