NICKEL NANO POWDER AND PRODUCTION METHOD THEREOF

PROBLEM TO BE SOLVED: To provide a nickel nano powder which has a lower baking initiation temperature compared with particles of similar particle sizes while showing a uniform particle distribution and realizes excellent electrode connectivity and uniformity.SOLUTION: A nickel nano powder comprises nickel nano particle bodies of an average particle size of 50-200 nm and ultrafine nickel particles formed on the surface of the nickel nano particle body, and the diameter of the ultrafine nano particles is 3-30% of the diameter of the nickel nano particle body. The nickel nano powder is produced by mixing a nickel precursor material with an organic amine, carrying out primary heating, adding a reductant, carrying out secondary heating to obtain a nickel nano particle body formed with protrusions on the surface and crushing the particle body with a gas to form the ultrafine nickel particles on the surface of the nickel nano particle. 【課題】均一な粒子分布を示しながらも類似の大きさの粒子に比べて低温の焼成開始温度を有し、且つ優れた電極の連結性及び均一度を実現できるニッケルナノ粉末及びその製造方法を提供する。【解決手段】平均粒径５０〜２００ｎｍのニッケルナノ粒子本体と、上記ニッケルナノ粒子本体の表面に形成される超微粒ニッケル粒子と、を含み、上記超微粒ニッケル粒子の直径は、上記ニッケルナノ粒子本体の直径の３〜３０％であるニッケルナノ粉末。前記ニッケルナノ粉末はニッケル前駆物質及び有機アミンを混合して一次加熱後、還元剤を添加し、二次加熱して表面に突起部が形成されたニッケルナノ粒子本体を得、該粒子本体を気体により粉砕して、前記ニッケルナノ粒子本体の表面に超微粒ニッケル粒子を形成する。【選択図】図４