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Differences Between Heavy Magnesium Oxide and Light Magnesium Oxide: Properties, Preparation, and Applications
Differences Between Heavy Magnesium Oxide and Light Magnesium Oxide
1. Different Volumes
Volume Classification:
Light Magnesium Oxide: Defined by a volume greater than 4 ml/g.
Heavy Magnesium Oxide: Defined by a volume less than 4 ml/g.
Intuitive Differences:
Light Magnesium Oxide: Has a larger volume and is relatively fluffy. It appears as a white amorphous powder and is typically used in mid to high-end industries.
Heavy Magnesium Oxide: Has a smaller volume and is more compact. It appears as a white or beige powder and is commonly used in low-end industries.
The volume of light magnesium oxide is approximately three times that of heavy magnesium oxide.
2. Different Properties
Light Magnesium Oxide:
Large volume and fluffy texture.
Difficult to dissolve in pure water and organic solvents.
Soluble in acid and ammonium salt solutions.
Transforms into crystals after high-temperature burning.
Heavy Magnesium Oxide:
Small volume and dense texture.
Easily combines with water.
Prone to absorbing water and carbon dioxide when exposed to air.
Easily solidifies and hardens when mixed with magnesium chloride solution.
3. Different Preparation Processes
Light Magnesium Oxide:
Generally produced by converting magnesium chloride, magnesium sulfate, or magnesium bicarbonate into a water-soluble product.
Chemically converted into an insoluble product and then calcined into magnesium oxide.
Resulting product has a low bulk density, typically around 0.2 g/ml.
The complex production process leads to higher production costs, making it more expensive than heavy magnesium oxide.
Heavy Magnesium Oxide:
Usually directly calcined from magnesite and brucite.
Has a bulk density of about 0.5 g/ml.
The production process is simpler, leading to lower sales prices.
4. Different Application Fields
Light Magnesium Oxide:
Used in the production of rubber products and chloroprene adhesives.
Acts as an acid absorbent and promoter in rubber manufacturing.
Reduces sintering temperature in ceramics and enamel.
Used as a filler in the manufacturing of grinding wheels and paints.
Food-grade light magnesium oxide can be used as a decolorizing agent in sugar refining and as a pH regulator in ice cream powder.
Applied in the pharmaceutical field as an antacid and laxative.
Commonly found in some drug instructions.
Heavy Magnesium Oxide:
Lower purity compared to light magnesium oxide.
Used for producing magnesium salts in the chemical industry.
Used in the construction industry for manufacturing artificial chemical floors, artificial marble floors, ceilings, and thermal insulation boards.
Used as a filling material.
Summary
Understanding the differences between heavy magnesium oxide and light magnesium oxide is crucial for selecting the appropriate material for specific applications. Light magnesium oxide, with its larger volume and unique properties, is suitable for high-end and specialized industries, while heavy magnesium oxide, with its smaller volume and lower cost, is more commonly used in general industrial and construction applications.
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