Strontium borate microparticles and preparation method thereof

Abstract

The invention discloses strontium borate microparticles and a preparation method thereof. The borate microparticles are prepared from strontium, boron and oxygen with the atomic ratio of 1:2:4, and the particle sizes range from 0.5 micrometer to 20 micrometers. The method comprises the steps that a sodium borate aqueous solution or a strontium salt aqueous solution are dropwise added into the strontium salt aqueous solution or the sodium borate aqueous solution which is under stirring, and a suspension is obtained; solid-liquid separation and washing and drying treatment are conducted on the suspension in sequence, and amorphous phase strontium borate particles are obtained; sodium hydroxide or sodium carbonate is added into an amorphous phase strontium borate particle aqueous solution at first to obtain a mixed solution, the mixed solution is placed at the temperature ranging from 150 DEG C to 280 DEG C, closed reacting is conducted for at least 1 h, and a reaction solution is obtained; the reaction solution is subjected to solid-liquid separation and washing and drying treatment in sequence, and then a target product is obtained. The strontium borate microparticles can be used as matrix materials of fluorescent powder for LED and are widely applied to the field of electroluminescence.

Description

technical field [0001] The invention relates to a micron particle and a preparation method thereof, in particular to a strontium borate micron particle and a preparation method thereof. Background technique [0002] In recent years, borate micro-nano materials have made a series of progress in the fields of luminescence and thermoluminescence detection, especially in the field of phosphor materials for LEDs, borate matrix materials have great advantages. Recently, people have made some beneficial attempts and efforts to obtain borate micro-nano materials, such as a compound monohydrate monoboric acid strontium dihydroxydecaborate disclosed on April 29, 2015 in the Chinese invention patent application CN 104562207 A Nonlinear optical crystal, its preparation method and application. The product mentioned in the invention patent application documents is Sr 2 (B 5 o 8 (OH)) 2 B(OH) 3 ·H 2 O, the preparation method uses the hydrothermal method. Although this product can b...

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Problems solved by technology

Although this product can be used as a nonlinear optical crystal for optical frequency multipliers, up or down frequency converters and optical parametric oscillators, there are deficiencies in both the preparation method and the product. Good performance in the field of luminescence; secondly, the size of the product is too large, which is not conducive to use as a matrix material for luminescence; thirdly, the preparation method not only cannot obtain a product with great advantages in the field of luminescence, but also has the defect of too long reaction time

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