The Role of Silicon in the Color of Gem Corundum | …
That paper shows that the silicon donor level lies well below the titanium donor level, and we used that position in our analysis of the effect of silicon on the color of corundum. Unknown at the time was that a second summary paper by the same author (Kröger, 1984b) corrected the silicon donor level based on measured data in a concurrent paper by Kröger and one of his students (Lee and
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Jadecarver provides high quality diamond tools for the lapidary, sculpturing, stone, glass, tile, welding, manufacturing and space industries.David custom designs many of the diamond tools found on the website. Jadecarver offers jade sculptures, jade boulders, and jade rough from around the world, specializing in nephrite jade from Siberia, Wyoming, California, and jadeite from Burma
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Grinding stone carbide tools In the Silicon Carbide egory, you will find a variety of products designed for Grinding and Smoothing Stones, like Marble, Granite and other Stones, Sandpapers, and Dresser Tools which contribute on the long life of your Silicon.
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Silicon carbide is harder than aluminum oxide, but more friable. Super-abrasive diamond pastes are useful in ferrous polishing or lapping appliions where heat and reactivity are not a factor. Cubic boron nitride (CBN) is a superabrasive grain with hardness second to diamond and a cubic crystal structure.
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Before electrolytic polishing, the samples have to be ground to 500# or finer on silicon carbide foil/paper. The finer the initial surface, the better the results of the electrolytical polish. Fig. 4: Laser weld in stainless steel, unmounted, electrolytically polished with A2 and etched with oxalic acid in water 10 %.
Silicon Carbide (carborundum)
Silicon carbide (SiC), also known as carborundum, is a semiconductor containing silicon and carbon with chemical formula SiC. It occurs in nature as the extremely rare mineral moissanite. Synthetic silicon carbide powder has been mass-produced since 1893 for use as an abrasive.
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Synthetic moissanite is also known as silicon carbide after its chemistry (in industry moissanite is known as the man-made abrasive Carborundum). Moissanite is used as a diamond substitute as it is transparent and hard with a slightly higher refractive index than diamond.
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When the stone is used dry, it will produce an extremely sharp edge on you tools. Silicon Carbide Stones are very fast cutting and whilst a thin clear oil is usually sufficient, cutting may be tempered by soaking the stone in hot petroleum jelly.
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