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The manufacturing method of zinc oxide is an important raw material for chemical production, widely used in fields such as plastics, ceramics, glass, electronics, medicine, etc. There are two main types of manufacturing methods: physical and chemical methods. This article will provide a detailed introduction to these two manufacturing methods, as well as their respective advantages, disadvantages, and application scope

1、 The physical method for producing zinc oxide mainly involves the conversion of zinc ore or zinc waste into zinc oxide through physical means such as mechanical grinding and high-temperature calcination. The specific steps are as follows: 

1 Ore preparation: Select zinc ore with high zinc content, crush and grind it into a powder with a certain fineness

2. Calcination: The zinc ore powder is calcined in a high-temperature furnace to convert the zinc oxide into zinc oxide. The calcination temperature and time are key factors affecting the purity and particle size of zinc oxide

3. Crushing: The calcined zinc oxide blocks are crushed and graded to obtain the desired particle size of zinc oxide powder

The physical method for producing zinc oxide has the advantages of simple process and low cost, but the product purity is low and the particle size distribution is wide, making it suitable for fields with low requirements for zinc oxide purity

2、 Chemical method for producing zinc oxide 

Chemical method for producing zinc oxide is the process of converting zinc salts into zinc oxide through a chemical reaction. Common chemical methods include precipitation method, hydrolysis method, sol gel method, etc

1. Precipitation method: The zinc salt solution is reacted with an alkaline solution to form zinc hydroxide precipitate, which is then calcined to obtain zinc oxide. The key to precipitation method is to control the precipitation conditions and calcination temperature to obtain high-purity and uniformly sized zinc oxide

2. Hydrolysis method: Add acid or alkali to zinc salt solution to cause zinc ions to undergo hydrolysis reaction to produce zinc hydroxide, which is then calcined to obtain zinc oxide. The hydrolysis method requires strict control of the pH value and temperature of the solution to ensure the progress of the hydrolysis reaction

3. Sol gel method: zinc salt solution is reacted with organic or inorganic compounds to generate sol, and zinc oxide is obtained through gelatinization, drying, calcination and other steps. Sol gel method can be used to prepare zinc oxide with high purity, uniform particle size and controllable morphology, but the process is complex

The chemical method for producing zinc oxide has advantages such as high product purity and narrow particle size distribution, but the process is complex and the cost is relatively high, making it suitable for fields that require high purity and particle size of zinc oxide

3、 The Application of Zinc Oxide 

Zinc oxide, as an important raw material for chemical production, is widely used in the following fields: 

1 Plastic industry: Zinc oxide can be used as an additive in plastics to improve their heat resistance, weather resistance, and mechanical properties

2. Ceramic industry: Zinc oxide can be used to prepare ceramic glaze and ceramic body, improving the toughness and thermal shock resistance of ceramics

3. Glass industry: Zinc oxide can be used as a glass additive to improve the transparency, heat resistance, and mechanical strength of glass

4. Electronics industry: Zinc oxide can be used to prepare piezoelectric materials, gas sensitive materials, optoelectronic devices, etc

5. Pharmaceutical industry: Zinc oxide can be used as a drug carrier and antibacterial agent to treat skin diseases, oral ulcers, and other diseases

In summary, zinc oxide has broad application prospects in the field of chemical raw materials, and the choice of its manufacturing method depends on the requirements of product purity and particle size, as well as considerations of production costs and other factors.