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The surface of silicon is always covered with a layer of silicon dioxide, even if it is just cleaved silicon, at room temperature, as long as it is exposed to air, an oxide film of several atomic layers will be formed on the surface. TC4 Titanium Alloy Powder Metallurgy Vacuum Sintering When we expose the silicon wafer to a high temperature and oxygen-containing environment for a period of time, the surface of the silicon wafer will grow a layer of silicon dioxide, SiO2, which has good adhesion to silicon and is highly stable chemically and electrically insulating. Vacuum Heat Treatment of Aerospace Fasteners Because silicon dioxide has such good properties, it is widely used in silicon semiconductor devices. According to different needs, silicon dioxide is used for the protective layer and passivation layer of devices, as well as the isolation of electrical properties, insulating materials and dielectric films of capacitors, etc. Analysis of vacuum heat treatment process for wind power products In addition to being prepared by heating silicon wafers, silicon dioxide can also be obtained by various chemical vapor deposition, such as LPCVD and PECVD. The choice of which method to prepare the silicon dioxide layer has a considerable relationship with the manufacturing process of the device.Vacuum Hardening Stainless Steel
High-temperature furnace box furnace is a common high-temperature heating equipment. Its structural features mainly include furnace body, heating element, temperature control system and furnace door. The following will explain these aspects in detail, and expand the description in conjunction with the title center.Effects of Vacuum Heat Treatments on Steels for Bearing Applications The furnace body is the main part of the high-temperature box-type furnace, which is usually welded by steel plates and has high strength and stability. The interior of the furnace body is usually lined with high temperature resistant materials to ensure the high temperature resistance of the furnace body. In addition, the furnace body is also equipped with vents and exhaust ports to facilitate the circulation and discharge of gas in the furnace.Application of Vacuum Heat Treatment in Fastener Manufacturing The heating element is the core part of the high temperature box furnace, usually made of materials such as resistance wire or electric heating rod. The number and layout of heating elements are determined according to the size of the furnace body and heating requirements. Usually, multi-point heating is used to ensure the uniformity and stability of the temperature in the furnace.Vacuum Hardening Stainless Steel Third, the temperature control system is an important part of the high-temperature box-type furnace, and its main function is to monitor and control the temperature in the furnace in real time. The temperature control system is usually composed of temperature sensors, controllers and actuators, which can realize functions such as automatic temperature control and timing temperature control to meet different heating requirements.Sintering of B4C by Pressureless Liquid Phase Sintering