Submicron Eu<3+>: beta-Li2TiO3 high-purity red fluorescent powder and preparation method thereof

[0038] Example 1

[0039] 1) Weigh a certain amount of Li 2 O particles are placed in a high-pressure container, and an appropriate amount of distilled water is added to the high-pressure container at a filling ratio of 70% (referring to the proportion of the volume of distilled water to the volume of the high-pressure container). After being fully dissolved, LiOH with a concentration of 1.00 mol / L is formed in the high-pressure container Solution

[0040] 2) According to the ratio of Li:Ti=2.05:1 (atomic mole ratio), weigh an appropriate amount of TiO 2 Powder. Follow Eu 3+ The molar concentration of is 1.0mol% (referring to Eu 3+ Accounting for matrix material β-Li 2 TiO 3 Molar concentration), weigh an appropriate amount of Eu 2 O 3 Powder. TiO 2 Powder and Eu 2 O 3 Add the powder to the high-pressure container of step 1 together;

[0041] 3) Put the inner lining of the high-pressure vessel in step 2 in an ultrasonic cleaning machine, and perform ultrasonic treatment, the ultraso

[0046] Example 2

[0047] 1) Weigh a certain amount of Li 2 The O particles are placed in a high-pressure container, and an appropriate amount of distilled water is added to the high-pressure container at a filling ratio of 65% (referring to the ratio of the volume of distilled water to the volume of the high-pressure container), and after it is fully dissolved, LiOH with a concentration of 2.50mol / L is formed in the high-pressure container Solution

[0048] 2) According to the ratio of Li:Ti=2.00:1 (atomic mole ratio), weigh an appropriate amount of TiO 2 Powder. Follow Eu 3+ The molar concentration of 6.5mol% (referring to Eu 3+ Accounting for matrix material β-Li 2 TiO 3 Molar concentration), weigh an appropriate amount of Eu 2 O 3 Powder. TiO 2 Powder and Eu 2 O 3 Add the powder to the high-pressure container of step 1 together;

[0049] 3) Put the inner lining of the high-pressure container in step 2 in an ultrasonic cleaning machine and perform ultrasonic treatment with an ult

[0054] Example 3

[0055] 1) Weigh a certain amount of Li 2 O particles are placed in a high-pressure vessel, and an appropriate amount of distilled water is added to the high-pressure vessel according to a filling ratio of 40% (referring to the proportion of the volume of distilled water to the volume of the high-pressure vessel). After being fully dissolved, a concentration of 3.00mol / L is formed in the hydrothermal kettle. LiOH solution;

[0056] 2) According to the ratio of Li:Ti=1.95:1 (atomic mole ratio), weigh an appropriate amount of TiO 2 Powder. Follow Eu 3+ The molar concentration of is 10.0mol% (referring to Eu 3+ Accounting for matrix material β-Li 2 TiO 3 Molar concentration), weigh an appropriate amount of Eu 2 O 3 Powder. TiO 2 Powder and Eu 2 O 3 Add the powder to the high-pressure container of step 1 together;

[0057] 3) Put the inner lining of the high-pressure container in step 2 in an ultrasonic cleaning machine and perform ultrasonic treatment with an ultrason