1, Rare: Germanium is a rare metal element, which is rare on the earth. At present, the available germanium resources in the world are limited. Scarce resources make the price of germanium relatively high.
2. High purity requirements: Germanium glass needs high purity germanium material to make. The process of preparing high-purity germanium material is complex, and special preparation process and equipment are needed to remove impurities from the original germanium material and control the purity of the material, which will increase the production cost.
3. Technical difficulty of preparation: The preparation process of germanium glass is relatively complex, which requires multiple steps, including melting, molding and annealing of germanium materials. These processes require strict temperature control and technical experience, as well as special equipment and highly specialized manufacturing technology, which also leads to higher production costs. Germanium glass is a glass material composed of germanium.