A brief introduction to silicon metal
As is known to all... Silicon metal properties and germanium, lead, tin similar, with semiconductor properties, is one of the semi-metal.
1. Silicon metal is extremely abundant in the earth's crust, second only to oxygen, accounting for more than a quarter of the total weight of the earth's crust. It exists in the form of silica or silicate. The melting point is 1420℃ and the density is 2.34 g/cm. Hard and brittle. Insoluble in acid at room temperature, soluble in alkali.
2, silicon metal has two allotropes: one is dark brown amorphous powder, lively nature, can burn in the air; The other is a stable crystal (crystalline silicon). General silica and quartz are used in glass and other building materials, and high quality quartz is used in alloys, metals and single crystals.
Large particle size silica sol lapping fluid is an advanced diluent lapping fluid with excellent stability in chemical mechanical lapping (CMP) technology. It is a new generation product of silica sol lapping fluid and gas phase silica lapping fluid. Its ultimate goal is to reduce the cost of consumables for users. Large particle size silica sol has excellent characteristics such as stable removal rate, low defect rate, high grinding ability and strict process control. The product is a new product of the company, which is simple to use and prevents condensation under high shear stress. It has little effect on the micro-roughness of the surface of the grinding pad, can obviously prolong the service life of the grinding pad, prolong the service life of the grinding pad dresser, and save the production cost.
We all know that pure cement can be made into HPC with a compressive strength of up to 100 MPa, but for concrete with a strength of more than 100 MPa, the effect is difficult to achieve? But if the industrial silicon powder is added after the effect is not the same, the following to understand the concrete after adding the appropriate silicon metal powder phenomenon.
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