Experimental measure mass diffusion transparency

• Borrowed the concept of electromagnetic wave transparency in electromagnetic material.
• Formulated various materials with a wide range diffusion coefficient.
• Obtained the conditions of the mass diffusion transparency.

Based on the concept of electromagnetic wave transparency in electromagnetic material, we proposed the concept of mass diffusion transparency. The mass diffusion transparency means that the trajectory of diffusion matter is not perturbed by neutral inclusion. We formulated different diffusion coefficient concrete by mixing cement, sand and glue, and fabricated the neutral inclusion. According to the mass diffusion transparent conditions, we obtained the size parameters and material parameters of the neutral inclusion. The simulation and experiment results show that the diffusion fluxes are parallel and equal outside the neutral inclusion, the iso-concentration lines are parallel outside the neutral inclusion.