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Ceramic pipes are a standout among the broad landscape of building materials because they are a dependable and adaptable option that can be used to ...

This article gives an overview of the iron removal process. Controlling the iron content is crucial if special ceramics are to maintain their original color. The presence of iron will also significantly affect the breakdown strength, insulation resistance, and withstand voltage performance of electronic ceramics. Hence, iron impurities must be removed.

This article briefly introduces several commonly used low-temperature composite sintering aid systems for aluminum nitride ceramics. Low-temperature sintering of AlN refers to lowering the sintering temperature from above 1800°C to between 1600°C and 1700°C. In this process, the type, adding method, and adding amount of sintering aids have a significant effect on the structure and performance of AlN ceramic materials and the corresponding products.

This article describes several commonly-used preparation methods of colored zirconia ceramics. Clearly, the single black and white zirconia ceramics cannot satisfy people's sensory needs, so the ceramic industry is focusing on how to make zirconia "colorful." The key to producing colored zirconia ceramics is to evenly distribute the coloring hue throughout the ceramic matrix.

This article presents several preparation methods of high-performance silicon nitride ceramic powder, including silicon powder nitriding, carbothermal reduction, liquid phase reaction, and high temperature self-propagating synthesis. Si3N4 powders manufactured using different processes typically have varied specific surface areas, which have certain influence on the final performance of Si3N4 ceramics.

Alumina is a kind of hexagonal material. If the grain size is too large, exceeding 410 um, there will be dual optical axes. The birefringence effect of ceramic grains causes light scattering and lowers ceramic light transmittance. Alumina transparent ceramics made using conventional techniques often have an in-line transmittance of less than 10%, which largely restricts their application. Hence, improving the light transmittance of alumina ceramics is crucial.

The manufacture of alumina ceramics involves numerous procedures. There are many chances for the raw materials to interact with the environment, tools, machinery, equipment, and utensils during the production process. Consequently, a variety of factors contribute to the pollution and quality issues with alumina ceramic parts. This article primarily introduces the spots and chromatic aberrations of alumina ceramics, and some prevention measures.

Zirconia is currently the most durable all-ceramic tooth material, and it is difficult to crack. Even though zirconia is more visually attractive than other restoration materials, it still has a poor aesthetic effect when used for crown and bridge restorations because of its low light transmittance. Accordingly, this article mainly introduces the factors that affect the translucency of zirconia, as well as some applications of ultra-transparent zirconia ceramics.

Zirconia materials are prone to cracking when fired because of the reversible transformation from the monoclinic phase to the tetragonal phase, which is accompanied by a volume change of 7% to 9%. Consequently, in practical applications, metal ion oxides with a radius comparable to that of Zr4+ are typically added to ZrO2 as a stabilizer to obtain a zirconia solid solution with a high-temperature crystal form that exists steadily at room temperature, thereby avoiding the volume effects due to phase transitions during heating or cooling.