Abstract: A method of making a lead-free ceramic coating is provided. The method includes providing a lead-free ceramic composition with a crystalline phase of perovskite structure. The ceramic composition has a general formula of: (1-a)(KbNacXd)(NbeYfZg)O3?aE, wherein X is one of an alkali metal, a transition metal and a post-transition metal; each of Y and Z is one of a transition metal and a metalloid; E is a metal oxide; 0?a?0.05; 0.4?b?0.6; 0.4?c?0.6; 0?d?0.2; 0.8?e?1; 0?f?0.2; 0?g?0.2; b+c+d=1; and e+f+g=1. The ceramic composition is heated to at least a partially molten state and the at least partially molten ceramic composition is deposited onto a substrate. The deposited ceramic composition is cooled and the deposited ceramic composition re-crystallizes on cooling to form the lead-free ceramic coating with a single crystalline phase of perovskite structure.