水酸アパタイト-ジルコニア系複合体のち密化及び機械的性質に対するフッ化カルシウムの添加効果

概要

論文の詳細を見る
CaF_2 up to 2.5 wt% was added to a mixture of 50 vol% Hydroxyapatite (HAp) and 50 vol% zirconia containing 2 mol% Y_2O_3. The mixture was hot-pressed at 1300°-1400℃ and 20 MPa for 10 min. The sintered bodies obtained consisted of apatite (HAp and/or FAp) and zirconia ( tetragonal and cubic phase) . The addition of CaF_2 enhanced the densification, increasing the bending strength and hardness. The bending strength of sintered body containing 0.5 wt% CaF_2 obtained at 1400℃ was about 450 MPa, whose value was about 12% larger than that without CaF_2. On the other hand, the fracture toughness was not improved by the addition of CaF_2. After soaking in distilled water, saline and Ringer's solution, bending strength of the composite ceramics was 12-14% lower than that in air.
社団法人日本セラミックス協会の論文
1988-12-01