METHOD OF MAKING LEAD-FREE CERAMIC COATING

摘要

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.

主权项

1. A method of making a lead-free ceramic coating, comprising:
providing a lead-free ceramic composition with a crystalline phase of perovskite structure, wherein the ceramic composition has a general formula of:
(KbNacXd)(NbeYfZg)O3−aE   (1-a) 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; heating the ceramic composition to at least a partially molten state; depositing the at least partially molten ceramic composition onto a substrate; and cooling the deposited ceramic composition, wherein the deposited ceramic composition re-crystallizes on cooling to form the lead-free ceramic coating with a single crystalline phase of perovskite structure.