Aqueous tape casting of CSLST microwave dielectric ceramic with BCL sintering aid

Aqueous tape casting of(Ca0.9375Sr0.0625)0.3(Li0.5Sm0.5)0.7TiO3(CSLST) microwave dielectric ceramic powder with B2O3-CuO-LiCO3(BCL) sintering aid was researched by using styrene-acrylic latex as binder, PAA as dispersant, glycerol as plasticizer, and deionized water as dispersion medium. Suitable slurry mass fraction components for aqueous tape casting are: ceramic powder of 50%, dispersant of 1%, binder of 10%, and the mass ratio of plasticizer to binder of 1:4. The slurry possesses the shear-thinning characteristics, and the well uniform green tape without crazing is achieved after aqueous tape casting. The diapHragm laminated later sintering at 900 ℃ possesses preferable microwave dielectric properties: er = 75.8, Q×f = 1 422 GHz, τf = 13.39×10–6/℃.