Sintering and Properties of Dense Manganese-Doped Calcium Phosphate Bioceramics Prepared Using Sol-Gel Derived Nanopowders I. Sopyan a , N. A. Nawawi a , Q. H. Shah b , S. Ramesh c , C. Y. Tan d & M. Hamdi c a Department of Manufacturing and Materials Engineering, Faculty of Engineering, International Islamic University Malaysia, Gombak, Kuala Lumpur, Malaysia b Department of Mechanical Enginee...