Methods For Producing Seed And Transformation Of Seeds Into Hollow Structures

An example method for producing a seed capable of transforming into a hollow structure includes providing a core, forming a coating around the core to create a coated core, forming an exterior layer surrounding the coated core, forming a layer of release agent surrounding the exterior layer, and heating the core, the coating and the exterior layer. Heating the core, the coating, and the exterior layer to a particular temperature transforms the exterior layer to a fixed shell and produces a seed with the coated core surrounded by the fixed shell. The particular temperature is sufficient to fuse or sinter the exterior layer, but too low to fuse the coating, and too low to cause the core to generate a gas.