Rare earth borate, its precursor, and luminophore made thereof

A rare-earth boron hydroxycarbonate in the form of cubic, parallelepipedal or spherical particles having a dispersion index of not more than 0.8.

A material comprising a matrix and a dopant, the matrix comprising a rare earth borate having a formula LnBO3, wherein Ln comprises at least one rare earth which has no luminescent property, and the dopant comprising at least one of antimony, bismuth, and a rare earth having luminescent properties, the borate having a morphology comprising spherical, cubic, or parallelepipedal particles with a dispersion index not greater than 0.8.

A material comprising a rare-earth boron hydroxycarbonate and a dopant, the hydroxycarbonate comprising at least one rare earth which has no luminescent property, and the dopant comprising at least one of antimony, bismuth, and a rare earth having luminescent properties, the hydroxycarbonate having a morphology comprising spherical, cubic, or parallelepipedal particles with a dispersion index not greater than 0.8.

A rare-earth borate, in the form of cubic, parallelepipedal or spherical whole particles having an average particle size of not more than 10 μm and having a dispersion index of not more than 0.8.

A rare-earth boron hydroxycarbonate in the form of cubic, parallelepipedal or spherical whole particles having an average particle size of not more than 10 μm and having dispersion index of not more than 0.8.

A material comprising a matrix and a dopant, the matrix comprising a rare earth borate having a formula LnBO3, wherein Ln comprises at least one rare earth which has no luminescent property, and the dopant comprising at least one of antimony, bismuth, and a rare earth having luminescent properties, the borate having a morphology comprising spherical, cubic, or parallelepipedal whole particles having an average particle size of not more than 10 μm and with a dispersion index not greater than 0.8.

A material comprising a rare-earth boron hydroxycarbonate and a dopant, the hydroxycarbonate comprising at least one rare earth which has no luminescent property, and the dopant comprising at least one of antimony, bismuth, and a rare earth having luminescent properties, the hydroxycarbonate having a morphology comprising spherical, cubic, or parallelepipedal whole particles having an average particle size of not more than 10 μm and with a dispersion index not greater than 0.8.

A process forming a rare-earth boron hydroxycarbonate, the process comprising forming a suspension with a starting material comprising a rare-earth carbonate or hydroxycarbonate and reacting the starting material with boric acid in an aqueous reaction medium.

A process of forming a rare-earth borate, the process comprising forming a suspension with a staring material comprising a rare-earth carbonate or hydroxycarbonate, reacting the starting material with boric acid in an aqueous reaction medium, recovering precipitate formed by the reaction, and calcining the precipitate.