Molten　salt　is　considered　to　be　part　of　the　main　direction　for　studying　high　temperature　heat　transfer　and　storage　medium　in　concentrated　solar　power　due　to　its　good　thermo　physical　properties.　Specific　heat　capacity　performs　a　significant　role　in　increasing　the　overall　cycle　efficiency　and　reducing　the　cost　of　heat　transfer　and　storage.　In　this　paper,　in　order　to　enhance　the　specific　heat　capacity,　1　wt%　SiO2　nano　particles　are　added　into　a　quaternary　nitrate　(Ca(NO3)(2)-KNO3-NaNO3-LiNO3　with　a　low　melting　point　called　the　low　melting　point　salt　(LMPS),　which　are　mixed　through　ultra-sonication.　Experimental　results　show　that　the　specific　heat　capacity　can　be　enhanced　when　nanoparticles　are　evenly　distributed　in　the　quaternary　nitrate.　The　optimal　ultra-sonication　time　with　a　frequency　of　45　kHz　is　researched.　The　average　specific　heat　capacity　of　nano-LMPS　can　reach　up　to　1.87　J/(g　K)　and　the　average　enhancement　reaches　19.4%.　There　is　a　good　linear　relationship　between　the　specific　heat　capacity　of　nano-LMPS　and　ultra-sonication　time.　Scanning　electron　microgram　images　reveal　that　lamellar　networks　with　higher　density　phase　on　the　solid　nano-LMPS　surface　exist　and　may　cause　the　specific　heat　capacity　enhancement　of　nano-LMPS.　(C)　2016　Elsevier　B.V.　All　rights　reserved.