焼成発泡法によるCaTiO_3多孔質支持体の作製

概要

論文の詳細を見る
CaTiO_3 porous substrates required for spin-coating of mixed conductor Ca(Ti, Fe)O_3 films were prepared by a foam-burning method. Mixtures of calcined CaTiO_3 powder and foaming agents such as corn starch, wheat starch D (+) -glucose and carbon black were heated gradually up to 500℃, then kept at 500℃ for 2h and finally sintered at 1350℃. Relatively large pores above 15 μm in diameter were formed when 15-35 mass% corn starch was used as a foaming agent. Pore diameter distribution broadened with wheat starch. Sintered compacts with pore diameters as small as 5-10 μm were prepared by using 15-25 mass% carbon black or D (+) -glucose. The addition increased the mechanical properties of the spin-coated substrate. Gas permeability was found to increase according to the order; corn starch>wheat starch>D (+) -glucose≧carbon black for a fixed amount of addition. An accelerated increase in the gaseous permeability was ascertained with increasing amount of foaming agent. A CaTiO_3 porous substrate prepared with 20 mass% carbon black or 40 mass% wheat starch exhibited sufficiently high mechanical strength for the thermal cyclic process of spin-coating and subsequent sintering.
社団法人日本セラミックス協会の論文
1997-11-01