[China Aluminum Network] 1. Functions of nano-alumina (VK-L05C) From the perspective of structural ceramics, nano-alumina fine ceramics can be divided into wear-resistant parts, structural parts, refractory parts, carriers, acid-resistant parts, and insulating parts. and many more.
From a functional point of view, nano-alumina has many functions such as electrical, optical, chemical, biological, sound absorption, thermal, and mechanical properties (see Table 1).
Table 1 Functions of nano-alumina (VK-L05C) fine ceramics Applications Integrated circuit Substrate, package, spark plug, Na-S battery solid electrolyte, sensor.
Optical function high pressure sodium vapor lamp tube, laser material.
Chemical functions control chemical reactions, purify exhaust gas, catalyst carriers, corrosion-resistant materials, solid-enzyme carriers.
Biological function artificial bone, artificial tooth root thermal function heat resistance, thermal insulation structure material mechanics functions abrasive materials, cutting materials, bearings, precision machinery parts.
Second, the application of nano-alumina (VK-L05C) fine ceramic nano-alumina fine ceramics made of nano-alumina (VK-L05C) as the main raw material, due to a variety of functions, in the field of high-tech technology and many industries Get the application, this article briefly describes the following:
1. Applications in the electronics industry (1) Ceramic multi-layer substrates for multi-chip packaging: Manufacturing methods for nano alumina ceramic multilayer substrates for packaging include thick-film printing, green lamination, and green-printing Thick film mixing method and other four.
(2) High Pressure Sodium Lamp Luminaire: The nano alumina transparent body formed of polycrystalline opaque nano alumina is applied to the high pressure sodium lamp, and the lighting efficiency is twice that of the mercury lamp, thus opening up new ways to improve the lighting efficiency. Transparent nano-alumina fine ceramics can not only transmit light, but also have high temperature resistance, corrosion resistance, high insulation, high strength, this article comes from the Chinese ceramics network dielectric loss and other properties, is an excellent optical ceramics, but also for the microwave oven window Wait.
(3) Nano-alumina ceramic sensor: The nano-alumina ceramic grain, grain boundary, porosity and other structural features and characteristics as a sensitive element, used in high temperature and corrosive gas environment, so that the detection and control information is accurate And quickly. From the type of application, there are sensors such as temperature, gas, and temperature.
2. Bio-Nano-Alumina (VK-L05C) Ceramics Nano-alumina polycrystals are used as bio-functional materials and applied to the human body. In 1969, nano-alumina fine ceramics were used in medical engineering as single crystals and sintered polycrystals. Now, the United States, West Germany, Switzerland and the Netherlands are all using polycrystalline nano-alumina to make artificial teeth and artificial bones. The medical materials are mainly nano-alumina, used for roots, joints, nano-alumina fine ceramics and human tissue fluids. The contact angle is a material that is closer to human teeth. There are more than 20 types of bio-ceramics used in medical engineering so far, and nano-alumina is one of the more used ones.
3, nano-alumina (VK-L05C) ceramic tool nano-alumina hardness (Hr) of 2700 ~ 3000, Young's modulus (kg/mm2) 35000 ~ 41000. Thermal conductivity of 0.75 ~ 1.35 × 103J/m · h · °C, thermal expansion coefficient of 8.5 × 10-6 / °C (room temperature ~ 1000 °C). While utilizing these characteristics, people have also developed Al2O3~TiO2, Al2O3-ZrO2 ceramics to improve the toughness and thermal shock resistance of nano-alumina ceramic tools to meet the needs of high-speed cutting.
Al2O3 particle size composition in the sintering process of nano-alumina grain size control is an important part of the decision tool quality, if the use of high temperature isostatic pressing (HIP), the grain size can be 0.3 ~ 0.5 microns. The nano-alumina tool's flexural strength can be increased to 900-1000 MPa.
