The　[Ca24Al28O64](4+):4e(-)　electronic　compounds　(C12A7:e(-))　with　low　work　function　and　stable　chemical　properties　have　been　employed　in　electron　emission　and　optical　devices.　In　this　paper,　C12A7:e(-)　was　successfully　prepared　using　CaO,　Al2O3,　and　Al　powders　through　spark　plasma　sintering　(SPS)　at　1250　degrees　C　for　20　min.　The　grain　size　of　the　sample　does　not　exceed　10　mu　m.　The　sample　exhibits　typical　Raman　peaks　at　175　cm(-1),　329　cm(-1),　510　cm(-1),　780　cm(-1),　and　a　clear　ultraviolet　absorption　peak　at　2.6　eV.　The　carrier　concentration　of　the　sample　reaches　1.67　x　10(21)　cm(-3).　The　emission　current　density　of　the　sample　at　4000　V　and　1100　degrees　C　is　1.34　A/cm(2),　with　a　fluctuation　of　no　more　than　5%.　The　zero-field　emission　current　density　is　1.18　A/cm(2)　at　1100　degrees　C.　The　lattice　thermal　conductivity　of　C12A7:e(-)　decreases　with　increasing　temperature,　reaching　12.59　W/(K　m)　at　1100　degrees　C.　In　addition,　the　band　structure　of　C12A7:e(-)　includes　valence　band　(VB),　cage　conduction　band　(CCB),　and　frame　conduction　band　(FCB),　and　CCB　extends　to　the　Fermi　level　and　has　a　bandgap　of　0.82　eV　with　FCB.　This　makes　C12A7:e(-)　exhibit　a　typical　band　conduction　mechanism.　The　electron　emission　characteristics　of　C12A7:e(-)　are　derived　from　the　contributions　of　the　s-orbital　electrons　of　Ca　atoms　and　the　p-orbital　and　d-orbital　electrons　of　Al　atoms.　This　article　simplifies　the　preparation　steps　of　C12A7:e(-)　cathode　materials,　shortens　the　synthesis　cycle,　and　provides　a　foundation　for　the　research　of　C12A7:e(-)　cathode.