1309-48-4 Magnesium Oxide Powder Bulk Loose Powder Density 3.58 G/Cm³ (At 25℃)

Product Specification

Appearance White, Loose Powder Density 3.58 G/cm³ (at 25℃) Molecular Weight 40.30

Basic properties

Chemical formula and molecular weight: The chemical formula of magnesium oxide is MgO, and the molecular weight is 40.304.

Appearance and state: It is a white solid at room temperature, usually in powder form.

Physical properties: Melting point is 2852, boiling point is 3600, and density is 3.58g/cm³ (25). Magnesium oxide is slightly soluble in water, and its solubility increases slightly with increasing temperature. For example, at 0, its solubility in water is 0.00062g/100mL; at 30, the solubility is 0.0086g/100mL. It is soluble in acid and ammonium salt solutions, but insoluble in alcohol.

Crystal structure: The crystal structure type of magnesium oxide belongs to the hexagonal closest packing (hcp) structure, which can also be called hexagonal close packing or compact packing (hcp) structure. In the magnesium oxide crystal structure, magnesium oxide molecules are arranged in a hexagonal close packing, oxygen ions are arranged closely along the axis of the stacking axis, magnesium ions occupy the hexagonal voids of the first and third layers, and are stacked with the second layer of oxygen ions, forming an ABA type stacking structure.

Specification Parameters (Table)

Preparation process

There are many methods for preparing magnesium oxide, including double reduction carbonization method, gas phase method, calcination method, carbonization method, ammonium carbonate method, carbonation method, sintering method, brine ammonium carbonate method, electric melting method and hydrochloric acid method. The following are some common preparation methods:

Double reduction carbonization method: The purified lime emulsion is subjected to carbonization reaction under specific conditions to generate a supersaturated solution of light magnesium carbonate containing MgO. Then, after filtering, analysis, calcination and other steps, a light magnesium oxide product is obtained.

Calcination method: After the magnesium-containing raw materials (such as magnesite, dolomite, etc.) are crushed, screened, and impurities are removed, they are calcined to dehydrate magnesium hydroxide to generate magnesium oxide.

Magnesium hydroxide calcination method: Using the impurity-purified magnesium sulfate solution as the raw material, pure ammonia water is added to the magnesium solution as a precipitant to precipitate Mg(OH)2, and then filtered, washed, dried, calcined and other steps to obtain high-purity magnesium oxide.

Electric fusion method: The electric fusion magnesium block is used as the raw material. After material selection, crushing and screening, it is fully mixed with a certain proportion of liquid titanium dioxide, and then washed, dried and sintered to screen out the finished product with a specific particle size, which is high-temperature electrical grade magnesium oxide.

Characteristics

1. Strong Chemical Stability: It maintains its chemical stability at high temperatures and is resistant to decomposition or deterioration.
2. Non-toxic and Harmless: It is non-toxic and harmless to humans and the environment, without generating harmful substances during use.
3. Renewable: It is a renewable resource that can be recycled through natural reactions.
4. High Insulation: It exhibits excellent insulating properties, suitable for the electronics industry.

Advantages

1. Enhanced Product Performance: Used in building materials such as glass and ceramics, it improves product quality and performance.
2. Environmental Applications: It can be used in wastewater treatment, flue gas desulfurization, and soil remediation, contributing to environmental protection.
3. Biomedical Applications: In the medical field, magnesium oxide serves as an antacid ingredient to relieve discomfort caused by excessive stomach acid secretion.

Application Fields

1. Industrial Applications: Used in the manufacture of fireproof boards, fireproof coatings, refractory bricks, and other fireproof materials, as well as catalysts, desiccants, and adsorbents.
2. Agriculture and Chemical Industry: Used in the production of fertilizers, pesticides, and dyes, enhancing product quality and performance.
3. Electronic Components: As a packaging material for electronic components, it improves their stability and reliability.
4. Biomedicine: Used in the manufacture of artificial bones, teeth, and other medical devices, with good biocompatibility and antibacterial properties.

Production Techniques

Magnesium oxide can be produced through various methods, including the carbonation process, calcination of magnesium hydroxide, soda ash process, and ammonium bicarbonate process. The choice of method often depends on the specific needs and characteristics of downstream industries. For example, the carbonation process can produce lightweight magnesium oxide, while the calcination of magnesium hydroxide can produce high-purity magnesium oxide.

Theory (Background)

Magnesium oxide consists of Mg²⁺ ions and O²⁻ ions bound together through ionic bonds to form a crystal lattice. At high temperatures, magnesium oxide exhibits excellent physical and chemical stability, making it a model system for studying crystal vibration characteristics. Additionally, magnesium oxide is widely regarded as the most effective metal stabilizer compared to silicate cement, lime, and others due to its superior buffering capacity, cost-effectiveness, and ease/safety of operation.

Services

Magnesium oxide enterprises should establish an application technology department with professional technical service personnel. These personnel should possess extensive knowledge and experience in production processes, technology, and magnesium oxide applications, enabling them to provide professional technical support and solutions to customers.

Packaging and Storage

Magnesium oxide should be stored in a cool, well-ventilated warehouse, avoiding direct sunlight and high temperatures. The warehouse should be kept away from fire sources and heat to prevent magnesium oxide from undergoing chemical reactions or fires due to high temperatures. The packaging of magnesium oxide should be intact to prevent leakage, damage, or dropping during transportation. According to the HG/T 2573-2012 standard, the packaging of industrial light magnesium oxide must comply with specific regulations.

Preventive Measures

1. Industrial Protection: Operators should wear appropriate personal protective equipment, such as dust masks, chemical safety goggles, breathable work clothes, and rubber gloves, during industrial use.
2. Medical Monitoring: When using magnesium oxide preparations in the medical field, they should be used as prescribed by a doctor to avoid long-term or excessive use, which may cause harm to the human body.
3. Environmental Monitoring: During storage and transportation, clear emergency response plans should be in place to address potential leaks or other emergencies.