La2Zr2O7　is　a　promising　thermal　barrier　coating　(TBC)　material.　In　this　work,　La2Zr2O7　and　8YSZ-layered　TBC　systems　were　fabricated.　Thermal　properties　such　as　thermal　conductivity　and　coefficient　of　thermal　expansion　were　investigated.　Furnace　heat　treatment　and　jet　engine　thermal　shock　(JETS)　tests　were　also　conducted.　The　thermal　conductivities　of　porous　La2Zr2O7　single-layer　coatings　are　0.50-0.66　W　m(-1)　degrees　C-1　at　the　temperature　range　from　100　to　900　degrees　C,　which　are　30-40%　lower　than　the　8YSZ　coatings.　The　coefficients　of　thermal　expansion　of　La2Zr2O7　coatings　are　about　9-10　x　10(-6)　degrees　C-1　at　the　temperature　range　from　200　to　1200　degrees　C,　which　are　close　to　those　of　8YSZ　at　low　temperature　range　and　about　10%　lower　than　8YSZ　at　high　temperature　range.　Double-layer　porous　8YSZ　plus　La2Zr2O7　coatings　show　a　better　performance　in　thermal　cycling　experiments.　It　is　likely　because　porous　8YSZ　serves　as　a　buffer　layer　to　release　stress.