Can be used as a colorant, decolorizer and purifier for glass Magnesium Oxide

Physical and chemical properties
Magnesium oxide is a white amorphous powder. Odorless, tasteless, non-toxic. Relative density is about 3.58 (25℃). Melting point is 2852℃, boiling point is 3600℃. It is difficult to dissolve in water, insoluble in alcohol, soluble in acid or ammonium salt solution. It can be converted into crystals after being burned at a high temperature of more than 1000℃. When the temperature rises to more than 1500℃, it becomes dead-burned magnesium oxide or sintered magnesium oxide. It generates basic magnesium carbonate when it meets carbon dioxide in the air.

Uses
Magnesium oxide is used to make ceramics, enamel, refractory crucibles and refractory bricks, etc. It is used as a polishing agent, adhesive, filler for paint and paper, accelerator and activator for chloroprene rubber, and can be mixed with magnesium chloride solution to make magnesium oxide cement. It is used as an antacid and laxative in medicine for hyperacidity, gastric and duodenal ulcers. It is also used in glass, dyes, phenolic plastics, etc. Food grade magnesium oxide is used as a decolorizer in the refining of sand and gravel, pH adjustment of ice cream powder, etc.

Preparation method
Soda ash method, ammonium carbonate method
High-purity magnesium oxide process
The domestic method that can actually mass-produce magnesium oxide with a content of more than 99% is mostly the magnesium hydroxide method, that is, using brine as the main raw material, ammonia or alkali as a precipitant, first making magnesium hydroxide and then calcining and decomposing it into magnesium oxide. Using Qinghai brine particles or other hydrous chlorine bischofite as the main raw materials, the magnesium oxide produced by the ammonia method should be able to reach more than 99%, and the large-scale production technology of magnesium oxide should be mature.

Application areas
High-purity magnesium oxide has excellent alkali resistance and electrical insulation at high temperatures. It has high thermal expansion coefficient and thermal conductivity and good light transmittance. It is widely used as a high-temperature heat-resistant material. In the ceramic field, it is used as a raw material for translucent ceramic crucibles, substrates, etc. In the electrical materials and electrical fields, it is used as a filler for magnetic devices, a filler for insulating materials, and various carriers. When used as a ceramic substrate, its thermal conductivity is more than twice that of alumina, and the loss of electrolyte is only 1/10 of that of alumina. It can also be used as a raw material for high-purity fused magnesia, and can be used as "analytical pure" magnesium oxide in chemistry.

Specification Parameters (Table)

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.

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.