Silicon nitride ceramic negatively refractive electromagnetic metamaterial with perfect imaging and super absorption, has industrial potential

https://www.eurekalert.org/news-releases/1074368

"corrosion resistance, excellent comprehensive mechanical properties, high: insulation, thermal conductivity, temperature resistance... overcomes low production efficiency, restricted product shape/ size, poor toughness... densifiable without mechanical pressure... metallic tungsten 2nd phase, matching silicon nitride ceramic thermal expansion... 20% content by volume of tungsten induces conductivity... optical stealth, wireless communication, electromagnetic wave absorption/ shielding"