Thermal　conductivity　enhanced　mineral-based　form-stable　phase-change　materials　(FS-PCMs)　have　promising　applications　in　energy-efficient　buildings.　Examining　the　changes　in　the　thermal　properties　induced　by　thermally　conductive　fillers　for　applying　FS-PCMs　is　of　great　significance.　Herein,　several　FS-PCMs　with　enhanced　thermal　conductivity　based　on　nano-Al2O3　modified　binary　fatty　acids　and　expanded　perlite　(EP)　were　synthesized.　The　results　demonstrate　that　nano-Al2O3　modified　capric-palmitic　acid　(CA-PA)　PCMs　have　ideal　phase-transition　enthalpy　and　good　temperature　regulation　ability　around　22　°C.　The　thermal　conductivity　and　phase-transition　enthalpy　of　EP/CA-PA/nano-Al2O3　FS-PCMs　vary　inversely　with　the　increase　in　nano-Al2O3　addition.　The　effects　of　nano-Al2O3　on　the　microscopic　morphology,　thermal　conductivity,　phase-transition　behavior,　and　thermal　stability　of　EP/CA-PA/nano-Al2O3　FS-PCMs　were　investigated.　Overall,　this　study　promotes　the　potential　applications　of　EP/CA-PA/nano-Al2O3　FS-PCMs　in　energy-efficient　buildings　and　provides　a　strategy　for　enhancing　the　thermal　conductivity　of　FS-PCMs.　©　2022　Elsevier　B.V.