What are the applications of magnesium fluoride

The vapor pressure of magnesium fluoride is high, and the raw material is volatile in the open system grown by the Czochralski method, so the crystal growth process needs to be carried out under positive pressure conditions. First, the crystal growth furnace was evacuated to a vacuum, and then filled to a slightly positive pressure with high-purity argon. After the gas is uniform, the argon gas is pumped out to remove impurities such as moisture and oxygen in the furnace. This process is repeated until the vacuum state in the crystal furnace is reached, and the temperature is raised to the melting of the magnesium fluoride sintered material. Application analysis of magnesium fluoride crystal material The amount of oxygen scavenger added during the growth of magnesium fluoride crystal to prevent oxygen or hydroxyl from entering the crystal. The processed crystalline material is filled into graphite. Among the materials known so far, magnesium fluoride crystal is one of the materials with light-transmitting properties in the vacuum ultraviolet band. Magnesium fluoride crystals range from vacuum ultraviolet to red. Single crystal atoms are arranged in a uniformly ordered long-range order, exhibiting a preferred orientation. Since there are no grain boundaries, adjacent particles (or fluorides). From the perspective of domestic and foreign markets and production processes, the competitive market is the dry aluminum fluoride production process and its products.

 Among the materials known so far, magnesium fluoride crystal is one of the materials with light-transmitting properties in the vacuum ultraviolet band. Magnesium fluoride crystals have good permeability from the vacuum ultraviolet to the infrared range and are common window materials for infrared and ultraviolet detectors. With the rapid development of high-power laser technology, high-precision imaging technology, infrared guidance technology and semiconductor lithography technology, the market demand for magnesium fluoride has increased dramatically, especially for high-quality single crystals in the foreseeable time. A state of short supply.

 Compared with polycrystalline magnesium fluoride, single crystal has higher transmittance in the ultraviolet region. In addition, single crystal materials are superior to polycrystalline materials in physical properties, have high mechanical strength, and are resistant to thermal shock and are not prone to cracking along grain boundaries.

 Magnesium fluoride is prone to oxidation or hydrolysis reactions at high temperatures to produce magnesium oxide impurities. Magnesium oxide has a high melting point and is not easily volatile. Magnesium oxide remaining in the growth system will reduce crystal filtering and cause defects such as scattered particles inside the crystal. Therefore, oxygen and water vapor must be avoided throughout the crystal growth process. It is necessary to add a mass percentage of oxygen scavenger to the magnesium fluoride raw material, which can not only effectively remove the moisture in the raw material and the crystallization furnace, but also further fluoride the raw material to avoid hydrolysis or oxidation. Magnesium fluoride crystal material.

 The vapor pressure of magnesium fluoride is high, and the raw material is volatile in the open system grown by the Czochralski method, so the crystal growth process needs to be carried out under positive pressure conditions. First, the crystal growth furnace was evacuated to a vacuum, and then filled to a slightly positive pressure with high-purity argon. After the gas is uniform, the argon gas is pumped out to remove impurities such as moisture and oxygen in the furnace. This process is repeated until the vacuum state in the crystal furnace is reached, and the temperature is raised to the melting of the magnesium fluoride sintered material.