Mixed　molten　salt　is　considered　as　a　promising　medium　for　both　heat　transfer　and　energy　storage　in　solar　thermal　power　because　of　its　many　advantages　such　as　large　heat　capacity,　low　vapor　pressure,　low　cost,　wide　range　of　temperature　in　application,　etc.　In　order　to　obtain　molten　salt　with　lower　melting　point　and　higher　decomposition　temperature,　a　new　kind　of　nitrate　was　prepared　based　on　different　mixing　ratios　of　KNO3-NaNO3-LiNO3-Ca(NO3)(2)center　dot　4H(2)O.　Experimental　results　show　that　the　melting　point　of　some　molten　salts　can　be　down　to　below　90　degrees　C　with　their　decomposition　temperature　above　600　degrees　C.　The　new　kind　of　mixed　molten　salts　has　a　lower　melting　point　and　wider　usable　temperature　range.　In　addition,　other　thermal　properties　such　as　latent　heat　of　melting,　specific　heat,　density,　viscosity,　thermal　conductivity　and　thermal　stability　are　measured　and　analyzed,　which　are　also　not　worse　than　that　of　commonly　used　mixed　molten　salt.　Therefore,　it　is　a　promising　medium　for　both　heat　transfer　and　energy　storage　in　solar　thermal　power　plants.　(C)　2014　Elsevier　B.V.　All　rights　reserved.