#grainboundary

Experimental methods LSTZ0.75 ceramics synthesis LSTZ0.75 were synthesized via conventional solid state reaction method. Stoichiometric amounts of Li2CO3 (99.99%, Sigma-Aldrich), SrCO3 (99.9%, ALB Materials Inc.), ZrO2 (99.9%, MSE Supplies), and Ta2O5 (99.9%, ALB Materials Inc.) were ground and mixed with ethanol for 18 h by high energy vertical planetary ball mill (MSE Supplies) with yttria…