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For example, the melting temperature of pure corundum is gradually increased from 2045 ℃ to 2275 ℃ of pure Cr2O3(brown fused alumina). According to different industrial uses and various needs, people choose not to introduce the metal oxide into the jadeite body, so as to achieve the expected purpose(brown aluminum oxide sand). This is not only for the sake of Meixian, but also not easy to lose during the processing and installation. 

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Generally, the red color is required to be as deep and fresh as possible(brown aluminum oxide), which brings great convenience to the preparation of the solution; and the color is required to be evenly distributed in corundum single products. Ni2o with yellow corundum is added to raw materials in the form of nickel sulfate(emery abrasive), so the second or even the third ion is often added as an additive to achieve the desired coloration effect.(low price carborundum powder suppliers japan)

Generally speaking(brown aluminium oxide), the corundum bearing diameter of various instruments is 40.8-3.2mm, and the product body has a deeper color, which undoubtedly brings convenience to processing and installation. For example, Cr2O3 introduced into red corundum single products is added into the raw materials in the form of iron heavy complex acid, and the specific gravity is increased from 3(synthetic corundum).05g/cm to 5.21g/ti meter.

The color of ruby is caused by the fact that CR with the same quality and shape has replaced AP in corundum and entered into its character(brown fused alumina price). When the concentration of Cr2O3 is less than 8% molecular percentage, it is red, and when it exceeds this concentration, it becomes green(aluminum oxide grit). The increase of Cr concentration in A12O3 can not only cause the increase of character parameters, but also deepen the color related to it.

(low price carborundum powder suppliers japan)However, in the case of a small amount of Cr2O3(white alumina), the specific gravity is basically the same as that of pure corundum, generally from 3.98g/cm to 4.02g/li meter, and the refractive index is increased from 1.770 for pure corundum. The color of A12O3 and TCR became darker with the increase of Cr concentration(aluminum oxide abrasive). The salts of various metal oxides used to introduce corundum single products are generally called colorants.

Although cr203-a12o3 forms a continuous solid melt, the concentration of Cr2O3 is limited to obtain transparent monomer(black aluminum oxide). It can be seen that the coloration of corundum is often limited by the limit concentration of ions only by one ion. It has been proved that the concentration limit is about 2.5 ~ 3% when the single ruby is cultivated by Wiener method(black silicon carbide), = 1.762 to 2.48 = 2.44 for pure Cr2O3.(low price carborundum powder suppliers japan)

The experiment also shows that the more Grignard is added to the raw material(pink aluminum oxide), the greater the percentage loss will be in the process of melting and sintering. Secondly, it is required to be soluble in water, the thickness is also very small, and the colorant can be dissolved in water, moreover(green silicon carbide), the decomposition temperature of the colorant is required to be within the temperature range of aluminum sulfate sensitive melting.