Zirconium nitride nanopowders production

 Zirconium nitride nanopowders were prepared by carbothermic nitridation process ofpowder mixture of zirconium hydroxide gel with carbon black. The effects of temperature,dwell time and C/Zr molar ratio on carbothermic nitridation process were investigated. Therelative content of nitride phase and the nitridation level increased with the increase ofreaction temperature and dwell time.

The molar ratio of C/Zr crucially decided the finalcomposition of the powder products. The addition of carbon black is necessary forconversion from oxynitride to nitride. But excess value of C/Zr would impede solid statediffusion so that was harmful to further nitridation. Based on our research, zirconiumoxynitride is intermediate product in CN process, and carbon mainly acted as an oxygengetter in this process. Those are the differences from CRN process. The CN processstarted with nucleation of oxynitride and substitution of its oxygen atoms by nitrogencompleted the nitride formation under the action of carbon as an oxygen getter.

Pre：The synthesis of zirconium nitride powders

Next：What is Zirconium Nitride coating