Preparation method of controllable yttrium silicate nano-rod

Abstract

The invention relates to a preparation method of a controllable yttrium silicate nano-rod. The preparation method comprises the following steps: respectively adding NaOH and analytically pure (NO3)3.6H2O and Na2SiO3.9H2O into distilled water, adjusting the pH to 4-13 and obtaining a solution A; adding the solution A into a hydro-thermal reaction kettle, sealing the hydro-thermal reaction kettle, placing the hydro-thermal reaction kettle into a temperature and pressure double-control microwave hydro-thermal reaction instrument, naturally cooling to room temperature after reaction, and obtaining a solution B; opening the hydro-thermal reaction kettle, collecting the product through filtering, washing the product by respectively adopting de-ionized water and absolute ethyl alcohol or isopropanol, drying the product in an electrothermal blowing dry box and obtaining a final product, i.e. yttrium silicate nano-powder. The invention adopts microwave hydro-thermal method to synthesize yttrium silicate nano-crystal, and then controls the yttrium silicate nano-structure through processes of anneal, and the like. The invention has the advantages of simple process preparation, convenient operation, easily obtained materials, low preparation cost, short reaction period, low temperature and good repetitiveness. The yttrium silicate nano-powder prepared by the method has narrow distribution of grain diameter, controllable crystal grain shape and higher purity.

Description

technical field [0001] The invention relates to a preparation method of yttrium silicate, in particular to a preparation method of controlled yttrium silicate nanorods. Background technique [0002] The structural characteristics and a series of excellent physical and chemical properties of yttrium silicate materials make it possible to be used as high-temperature anti-oxidation coating materials, optical matrix materials and Dielectric materials, etc. At present, the methods for preparing yttrium silicate crystals mainly include solid-state reaction method, hydrothermal method and sol-gel method. However, due to the many crystal forms and complex structures of yttrium silicate, the above-mentioned methods generally require high temperature (such as 1500-1700°C for solid-state reaction method) or long time (such as 24-200h for hydrothermal method) to obtain silicic acid with expected structure. Yttrium crystals, and the microscopic morphology of the prepared yttrium silica...

AI Technical Summary

Problems solved by technology

Its preparation method is complex and requires high temperature for a long time, and its application is limited due to its large volume

YCl 3 , PrOH, TEOS, etc. as raw materials, Y was prepared by the sol-gel method 2 SiO 5 , the process is complex, the cycle is long, and there are impurities. There is no more detailed report on the impact of the process on the structure

Ana I.Becerro et al. (Ana I.Becerro, Moise's Naranjo, Ana C.Perdigo'n, and Jose'M.Trillo Hydrothermal Chemistry of Silicates: Low-Temperature Synthesis of y-Yttrium Disilicate.J.Am.Ceram.2003.86 [9]1592-1594.) with Y 2 o 3 , SiO 2 etc. as the main raw materials and synthesize yttrium silicate at high temperature, the preparation temperature is too high and the cycle is long, which is not conducive to mass production

[0005] So far, although there are many reports on the preparation of yttrium silicate, the control of the morphology of yttrium silicate is rarely involved.

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