We are Russian producer of semiconductor materials, for our manufacture we usually use quartz products. So, could you make your offer under our requirements: Quartz optical glass, transparent in UV and visible region of the spectrum, with weak absorption band of the range of wavelengths 170-250 nanometer wavelength, with a bandwidth of absorption in the range 2600-2800 nanometer. Requirements for quartz products: 1. Quartz product is designed to operate in a vacuum, in pairs sulphur, cadmium, tellurium at a temperature of not more than 1250o C. Softening temperature quartz - (minus)1700oC . 2. Quartz products should not have a fistula, cracks, chips, scratches. Dimensions of internal bubbles should not be more than % of the thickness of the wall. 3. Quartz products should not be rough, blasting, should not have drops of quartz on the surface. 4. With quartz products should be cleared of all voltage by thermal annealing. 5. Quartz products must be processed. (China Glass Network)
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