Exploring high-temperature synthesis: Growth mechanism and application potential of hexagonal magnesium hydroxide crystals

The hexagonal flaky crystals of magnesium hydroxide (Mg(OH)₂) have shown wide application prospects in various industries such as chemical industry, building materials, and coatings due to their unique structural characteristics. This study focuses on the synthesis process of hexagonal flaky magnesium hydroxide crystals in a high-temperature system, revealing its growth mechanism and evaluating its potential application value.

This study uses solvothermal and hydrothermal synthesis methods to promote the growth of magnesium hydroxide crystals under high temperature conditions. These methods use the energy provided by high temperatures to optimize conditions for crystal nucleation and growth.

Crystal growth mechanism

nucleation stage

The supersaturation state of magnesium ions and hydroxide ions induced by high temperature initiates the crystal nucleation process.

growth stage

After nucleation, the crystal absorbs magnesium ions and hydroxide ions along specific crystal planes to form a hexagonal sheet structure. Its growth is affected by a variety of factors.

growth kinetics

The crystal growth rate is closely related to solution concentration, temperature gradient, crystal defects, etc., especially in high-temperature systems.

experimental research

Experimental materials

Magnesium chloride or magnesium nitrate is selected as the magnesium source, and crystal synthesis is achieved through precise proportioning.

Experimental conditions

The reaction temperature, pressure, pH value and time are carefully controlled to provide the best environment for crystal growth.

Characterization techniques

Use advanced characterization technologies such as XRD, SEM, and TEM to comprehensively analyze the morphology, size, and quality of crystals.

Results and discussion

Crystal form and size

SEM and TEM observation results confirmed the formation of hexagonal lamellar crystals and analyzed the distribution characteristics of the crystal size.

Crystal quality

XRD analysis revealed the high crystallinity and phase purity of the crystals, confirming the effectiveness of the synthesis method.

The hexagonal flaky magnesium hydroxide crystal synthesized in a high-temperature system not only has excellent physical and chemical properties, but also achieves effective control of crystal morphology and size by precisely controlling the synthesis conditions, laying the foundation for its application in many fields.