1. Function 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, insulating parts and so on.
From a functional point of view, nano-alumina has many functions such as electrical, optical, chemical, biological, sound absorption, thermal, mechanical and so on.
Table 1 The function of nano-alumina (VK-L05C) fine ceramics
Functional application
Integrated circuit substrate, package, spark plug, solid electrolyte of Na-S battery, sensor.
Optical function high-pressure sodium vapor lamp luminous tube, laser material.
Chemical function controls chemical reaction, purifies exhaust gas, catalyst carrier, corrosion-resistant material, solid enzyme carrier.
Biological function artificial bone, artificial tooth root
Thermal function heat-resistant, heat-insulating structural material
Mechanical functional abrasive materials, cutting materials, bearings, precision machinery parts.
Second, the application of nano-alumina (VK-L05C) fine ceramics
Nano-alumina fine ceramics made from nano-alumina (VK-L05C) as the main raw material have been used in high-tech fields and many industries due to their multiple functions. This article is briefly introduced as follows:
1. Application in the electronics industry
(1) Ceramic multilayer substrates for multi-chip packaging: The manufacturing methods of nano-alumina ceramic multilayer substrates for packaging include thick film printing method, green lamination method, green printing method, thick film mixing method, etc. .
(2) High-pressure sodium lamp luminous tube: A nano-alumina transparent body formed of polycrystalline opaque nano-alumina is used in the high-pressure sodium lamp luminous tube. The lighting efficiency is twice that of mercury lamps, thus opening up a new way to improve lighting efficiency. The transparent nano-alumina fine ceramic not only can transmit light, but also has the properties of high temperature resistance, corrosion resistance, high insulation, high strength, and low dielectric loss from Huaxia ceramic mesh. It is an excellent optical ceramic and can also be used as a microwave oven window. Wait.
(3) Nano-alumina ceramic sensor: use nano-alumina ceramic grains, grain boundaries, pores and other structural features and characteristics as sensitive elements, used in high temperature and corrosive gas environment, so that the detection and control information is accurate And quickly. From the perspective of application type, there are temperature, gas, temperature and other sensors.
2. Bio-nano alumina (VK-L05C) ceramics
Nano-alumina polycrystals are used as biological functional materials and applied to the human body in 1969. Nano-alumina fine ceramics are used in medical engineering for single crystal and sintered polycrystal. At present, the United States, West Germany, Switzerland and the Netherlands are all exporting tariffs on Guangzhou aluminum ingots. Polycrystalline nano-alumina is commonly used to make artificial teeth and artificial bones. The medical material is mainly nano-alumina, which is used for roots, joints, The contact angle between alumina fine ceramics and human tissue fluid is a material closer to human teeth. So far, there are more than 20 kinds of bioceramics used in medical engineering, and nano-alumina is the most used one.
3. Nano-alumina (VK-L05C) ceramic cutter
The hardness (Hr) of nano alumina is 2700 ~ 3000, and Young's modulus (kg / mm2) is 35000 ~ 41000. Thermal conductivity 0.75 ~ 1.35 × 103J / m · h · ℃, thermal expansion coefficient 8.5 × 10-6 / ℃ (room temperature ~ 1000 ℃). While using these characteristics, people have also developed Al2O3 ~ TiO2, Al2O3-ZrO2 series 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 during the sintering process control of nano-alumina grain size is an important part of determining the quality of the tool. If high temperature isostatic sintering (HIP) is used, the grain size can be 0.3 ~ 0.5 microns. The bending strength of nano-alumina cutting tools can be increased to 900 ~ 1000MPa.
Application of nano-alumina in fine ceramics
2020 04/27