Abstract: The effect of different nickel sources on the Ni₃（BO₃）₂ product was discussed.It was ultimately determined that NiCO₃·2Ni（OH）₂·4H₂O as the nickel source reacted stoichiometrically with H₃BO₃ to obtain Ni₃（BO₃）₂ at lower temperature.The structure and morphology of products were characterized by XRD，IR spectra，and SEM.XRD and IR analysis results showed that pure orthorhombic structured Ni₃（BO₃）₂ were synthesized by which the basic nickel carbonate（as the nickel source) and boric acid were only calcined at 700 ℃ for 3 h according to a stoichiometrical ratio.SEM result showed that the as-prepared powders exhibited good dispersion，and a uniform particle size distribution of 200~250 nm in the absent of organic solvents.

Key words: basic nickel carbonate, solid-state method at low temperature, nickel borate