Manufacturing line, process, and sintered article

A sintered polycrystalline ceramic ribbon, comprising:

• ceramic grains fused to one another;
• a length of at least 10 m,
• a thickness of at least 10 μm and less than 100 μm,
• a width at least 10 times the thickness, and wherein the length is at least 100 times greater than the width,
• wherein the ribbon has fewer than 10 pin holes having a cross-sectional area of at least a square micrometer per square millimeter of surface on average over full surfaces thereof;
• and
• wherein porosity of the ribbon is less than 1%.

A sintered polycrystalline ceramic ribbon, comprising:

• ceramic grains fused to one another;
• a length of at least 10 m,
• a thickness of at least 10 μm and less than 100 μm,
• a width at least 10 times the thickness, and wherein the length is at least 100 times greater than the width,
• wherein the ribbon has fewer than 10 pin holes having a cross-sectional area of at least a square micrometer per square millimeter of surface on average over full surfaces thereof, and
• wherein the ceramic grains are lithium garnet.