低カリウム溶出性六チタン酸カリウム繊維の合成と評価

概要

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A conversion process from potassium tetratitanate fibers into potassium hexatitanate was investigated to develop potassium hexatitanate fibers with negligible leachability which are usable as a filler for fiber-rein-forced polyester thermoplastic resins. Calcined potassium tetratitanate fibers were dispersed in water. By titrating the above mentioned suspension with an aqueous HCI solution to adjust the value of([K^+]/[H_3O^+])^<2/3>=5.71×10^5 at 60℃, the fibers with TiO_2/K_2O=5.95 was obtained. The product thus obtained was heated at 1000℃ for 30 min, then potassium hexatitanate fibers having a tunnel structure were obtained. Then, the water soluble potassium was further removed with an aqueous HCI solution. Potassium hexatitanate fibers having a tunnel structure whose molar ratio of TiO_2/K_2O was 6.0 was obtainable. Water soluble potassium thus prepared was only 4 mass ppm. The potassium hexatitanate fibers prepared by the novel method developed by the present authors ware found useful as a reinforcing material for polycarbonate which has been known to be vulnerable to soluble potassium.
社団法人日本セラミックス協会の論文
1995-02-01