Mindblown: a blog about philosophy.

Phase transformation toughening is an early and commonly studied toughening method. It artificially creates a large number of extremely fine cracks in the material to absorb energy and prevent crack propagation. Among them, the research mainly focuses on the martensitic transformation of ZrO2, with relatively successful ceramic materials such as Zirconia toughened alumina and ZTM.…

Dry pressing forming: The dry pressing forming technology of alumina ceramic is limited to objects with simple shapes and inner wall thickness exceeding 1mm, and a length to diameter ratio of no more than 4:1. The forming methods can be uniaxial or bidirectional. There are two types of presses: hydraulic and mechanical, which can be…

Industrial Al2O3 used in the production of structural ceramics is calcined at a higher temperature to completely transform it into α-Al2O3. The shrinkage and local sintering during the crystallographic transformation causes a change in the particle size composition of Al2O3 – the number of fine particles increases. The calcination process also causes a significant change…

So far, many crystalline states, or low-temperature and high-temperature types, have been discovered. The identified there are nine types of alumina: a, K, &, y, x, edge, γ, p, β, etc. β-Al2O3 is not a pure alumina.Its composition is Na20(K2O)-11Al2O3 containing alkali metal ions, but it is still customarily regarded as a kind of alumina.Al2O3…

Silicon carbide crucible are a popular choice for many foundry applications due to their several key advantages over metal crucibles. The primary advantage of these crucibles is their high refractoriness, which allows them to operate at temperatures as high as 1600 degrees celsius. They can be utilized for melting and holding various ferrous and nonferrous…

Uses of hexagonal boron nitride   Hexagonal boron nitride is a material with high temperature resistance, corrosion resistance, high thermal conductivity, high insulation and excellent lubrication properties, and is widely used in petroleum, chemical, mechanical, electronic, electric power, textile, nuclear industry, aerospace and other sectors. Using the excellent chemical stability of hexagonal boron nitride, it…