1, calcium carbonate, hydrated lime and other alkaline materials containing calcium. The general application amount is for the purpose of improving the soil PH value of about 7, because the soil PH value is increased to more than 7, the inhibition effect on heavy metals can reach 70%-80%.
2, thallium mainly exists in the parent material of the earth, through natural chemical reactions and geochemical processes released. In the soil, thallium can be combined with other metallic elements to form various compounds, such as sulfides and sulfide minerals. In industrial production, thallium can be produced as a by-product. The main function of the passivation layer is to reduce the surface recombination rate of the battery, so as to improve the photoelectric conversion efficiency of the battery. The surface recombination rate is reduced in semiconductor materials when photons strike the batteryOn the surface, electron-hole pairs are created. The role of the passivation layer in the battery is to enhance the stability of the battery and improve the photoelectric conversion efficiency. First, let's look at the basic structure of the battery. The cell, especially in the photovoltaic field, usually refers to the solar cell, which is the core part of the solar photovoltaic system, responsible for converting solar energy into electricity. The main function of the passivation layer is to reduce the surface recombination rate of the battery, so as to improve the photoelectric conversion efficiency of the battery. In detail, the role of the passivation layer in the battery is crucial. The cells act as photovoltaic cellsIts main function is to convert light energy into electricity. The chip passivation layer is a protective layer that prevents the surface of the chip from being eroded by oxygen in the air. The PI layer of the chip is an electrical insulation layer, which is used to isolate the current leakage between the circuit in the chip and the external circuit. has different uses. The passivation layer can transform the metal surface into a state that is not easy to be oxidized, and delay the corrosion rate of the metal. It is commonly used in industrial operations. The pi layer of the chip is an important part of the mobile phone chip, which is usually used in the production of mobile phones in the form of mobile phone parts. 2, hello, do you want to ask hydrogen peroxide storage tank will passivation? Hydrogen peroxide tanks will not be passivated. Because in GB1616-2003 "Industrial hydrogen peroxide" provisions, the mass fraction of less than 50% using dark plastic polyethylene storage tank, qualityVolume fraction of 70%, passivated stainless steel storage tank material. So the hydrogen peroxide tank won't be passivated. 3. Hydrogen peroxide will passivate the surface of iron, that is, a dense oxide film will be formed on the surface of iron. But when hydrogen peroxide comes into contact with rusty iron, the above changes do not occur. Rust adheres to the surface of pure iron. The main components of rust are iron sesquioxide and a small amount of ferrous oxide. 4, determine the stability of hydrogen peroxide, to passivate the beaker. The composition of the beaker is glass, and the preparation of the glass is quartz and sodium carbonate, in which the sodium ion replaces part of the hydrogen on the silicon hydroxyl group, which is alkaline.Alkalinity is the catalyst for hydrogen peroxide decomposition. Therefore, the beaker must be passivated so that it loses its alkalinity and thus loses its catalytic activity. 5, passivation paste: 30%HNO3 or 25%HNO3 1% (mass fraction) K2Cr207 and BaSO7 to paste. Coating surface 5 ~ 30min, wash with condensate water to pH=7, single equipment can also be sprayed hydrogen peroxide chemical passivation method. (2) Take Patent m of Shanghai Daming Iron Factory as an example. Action of passivation layer in battery