What is the melting point and density of lithium disilicate glass ceramics?

Regarding the melting point and density of lithium disilicate glass ceramics, the following information is organized according to authoritative sources:

Fusing point

The melting point of lithium silicate is affected by many factors, including crystal structure, composition and crystallization conditions. Therefore, the melting point of lithium silicate is not a fixed value. Under normal circumstances, the melting point of lithium silicate ranges from about 950 ° C to about 1200 ° C. Among them, Li2O·2SiO2 and Li2O·3SiO2 are the main components of lithium silicate, and its melting point is mostly concentrated at about 1000℃. It is worth noting that the melting point of lithium silicate is closely related to its crystal structure. There are two main crystal structure types of lithium silicate, which are high temperature phase (β-lithium silicate) and low temperature phase (α-lithium silicate), and the melting point of the two is also different. Among them, the melting point of α-lithium silicate is higher, usually above 1100 ° C, while the melting point of β-lithium silicate is lower, generally around 950 ° C. However, the specific melting point of the lithium disilicate glass ceramics composite may vary due to the different preparation process and composition ratio. Therefore, an exact melting point value cannot be given.

density

The density of lithium disilicate glass ceramics varies depending on its composition and preparation process. However, according to reliable sources, the density of lithium disilicate glass powder is about 2.44g/cm³. This means that the mass of lithium disilicate glass powder per cubic centimeter is about 2.44 grams. Since the density of glass ceramics is closely related to its composition and microstructure, and may vary depending on the preparation process, the overall density of lithium disilicate glass ceramics may also fluctuate around this value. However, it should be noted that this density value refers to the state of lithium disilicate glass powder, and the density of lithium disilicate glass ceramic parts that have been processed may change due to shrinkage and densification during the sintering process.

In summary, the melting point and density of lithium disilicate glass ceramics are affected by many factors, and an accurate value cannot be given. For the melting point, it is usually located in the range of 950 ° C to 1200 ° C, but the specific value may vary depending on the material and process. For density, the density of lithium disilicate glass powder is about 2.44g/cm³, but the density of the formed lithium disilicate glass ceramic parts may vary.