关键词: 石英光纤, 化学镀, 附着力

Abstract: Quartz optical fibers are of great significance in many fields. For example,they can be used to fabricate strain sensors and temperature sensors.If the surface of optical fibers is metal-coated by the electroless plating method, the measuring precision and stability of the optical fiber sensors can be improved remarkably, additionally the life-span of sensors can be prolonged.In this work, an electroless nickel-phosphor plating process for optical fibers was presented.The influences of the content of NaH₂PO₂•H₂O, bath pH value and temperature and the plating deposition rate on the quality of the plating coatings were studied with orthogonal testing.The results indicated that the content of NaH₂PO₂•H₂O was the key factor, which influenced the adhesion force of the plating coatings.The nickel-phosphor plating bath presented in this work possessed excellent stability and the plating deposition rate could be accelerated.Using the process described in this work, nickel-phosphor coatings with great brightness and high adhesion force can be prepared successfully.Optimum conditions were: NiSO4 30 g•L^-1, NaH₂PO₂•H₂O 20 g•L^-1, C₃H₆O₃ 4 ml•L^-1, Na₂CO₃ 3 g•L^-1, NH₄Cl ₄ g•L^-1, saccharin 1 mg•L-1, temperature 84 ℃, pH 4.6.

Key words: 石英光纤, 化学镀, 附着力