Fluorozirconate fibers

Blue transitions are also observed with IR excitation at 1.064 m in Tm3+-doped fluorozirconate fibers. Depending on the pumping power, different up-conversion pathways are identified. For low pumping powers, a four-fold up-conversion process leads to excitation of 1D2 ... 

Textile Finishing. Polyethyleneimine-A/-methylolurea derivatives improve the crease and wear resistance of cotton (429,430). The adhesion between individual wool fibers is improved by pretreatment with amines, which leads to improved shrink resistance (431). An antimicrobial finish can be appHed to cotton by using a combination of PEI and ureas to bind zinc pyrithione to the fabric (432). After wool has been provided with a flameproof finish using fluorozirconate or fluorotitanate, the wool can be neutralized with PEI (433). Conventional neutralizing agents caimot be used for this purpose since they impair the flameproof characteristics of the impregnated fabric. 

All fluoride glasses have excellent optical properties and transmit more than 50% between 0.25 pm and 7pm. While fluoroaluminate glasses do not transmit as far as fluorozirconate glasses, non-ZrF4 based on heavy metal can transmit to even longer wavelengths. As a result, fluoride glasses are candidate materials for both bulk windows and fibers for the IR. 

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