Quartz glass, as an important inorganic non-metallic material, plays a key role in many fields with its unique physical and chemical properties. Hardness, as the ability of a material to resist deformation and scratching, is one of the most important indicators of the performance of quartz glass.

Overview of hardness of quartz glass

1. Definition of hardness

Hardness is the ability of a material to resist being pressed into or scratched by a hard object. Usually, hardness is categorized into various types, such as Mohs, Vickers and Rockwell. For quartz glass, its hardness is usually expressed in Mohs or Vickers.

2. Mohs hardness of quartz glass

The Mohs hardness of quartz glass is about 5.5 to 6.5, between ordinary glass (Mohs hardness of about 5.5) and quartz crystal (Mohs hardness of 7). This hardness value gives quartz glass good resistance to abrasion and scratching in everyday use.

Factors affecting the hardness of quartz glass

1. Chemical composition

The chemical composition of quartz glass has a significant effect on its hardness. The higher the purity, the higher the hardness of quartz glass usually is. The presence of impurity elements may reduce its hardness.

2. Structural Homogeneity

The structural homogeneity of quartz glass also has an effect on its hardness. Structural defects, air bubbles, etc. can affect the hardness of quartz glass. Quartz glass that has been melted at high temperatures and cooled slowly has a more uniform structure and is relatively hard.

3. Temperature

Temperature has a greater effect on the hardness of quartz glass. As the temperature increases, the hardness of quartz glass decreases. Under high temperature environment, quartz glass is prone to soften and the hardness decreases significantly.

Quartz glass hardness test method

1. Mohs hardness test

The Mohs hardness test is an easy and practical method for quickly assessing the hardness of quartz glass. During the test, the quartz glass is scratched with minerals of known hardness, and the Mohs hardness of the quartz glass is judged according to the scratched traces.

2. Vickers Hardness Test

Vickers hardness test is a high precision hardness test method. During the test, a diamond indenter with a certain load is pressed into the surface of quartz glass, and the Vickers hardness value is calculated according to the area of the indentation.

3. Rockwell Hardness Test

Rockwell hardness test is suitable for harder materials, such as quartz glass. During the test, a diamond cone or steel ball indenter is pressed into the surface of the material, and the Rockwell hardness value is calculated according to the depth of the indentation.

The high hardness of quartz glass gives it excellent properties in terms of abrasion and scratch resistance. Understanding the hardness characteristics of quartz glass helps us to better apply this material. In the actual production and application process, the appropriate hardness test method should be selected according to the needs to ensure the quality and performance of quartz glass products.

Luverre Quartz manufactures and sells a wide range of high quality quartz glass, including quartz tubes, quartz plates, quartz rods, quartz windows, quartz crucibles, quartz boats, quartz flanges, quartz beakers, quartz glass instruments, and more. We can meet all kinds of customized requirements for quartz glass products.