The goads of this thesis: Successfully fabricated ceramic piezoelectric samples (Ba1-xCax) TiO3 (BCT) and BZT-BCT by solid phase synthesis method. BZTBCT materials must be good quality, high piezoelectric coefficient (500-600 pC / N). Studying the relationship between morphological competition and dielectric ferroelectric properties, especially with the high piezoelectric properties of materials. | Summary of doctoral in materials science: Fabrications of ferroelectric materials do not contain Pb on BaTiO3 substrate and study their electricity and piezoelectricity properties MINISTRY OF EDUCATION AND VIET NAM ACADEMY OF SCIENCE TRAINING AND TECHNOLOGY GRADUATE UNIVERSITY OF SCIENCE AND TECHNOLOGY ***** . NGUYEN VAN KHIEN Fabrications of ferroelectric materials do not contain Pb on BaTiO3 substrate and study their electricity and piezoelectricity properties Specialized: Electronic materials Numerical code: SUMMARY OF DOCTORAL IN MATERIALS SCIENCE Ha noi, 2018 The work is completed at: INSTITUTE OF MATERIALS SCIENCE - VIET NAM ACADEMY OF SCIENCE AND TECHNOLOGY Science supervisor: 1. Le Van Hong 2. PGS. TS. Nguyen Van Dang PhD dissertation reviewer 1: PhD dissertation reviewer 2: PhD dissertation reviewer 3: The thesis will be protected under supervisory board academy level at: Academy at hours day month 2018 People can find this thesis at: - National library - Graduate university of Science and Technology library LIST OF PROJECTS PUBLISHED Articles in the ISI directory 1. Le Van Hong, Nguyen Van Khien and Truong Van Chuong, “Dielectric Relaxation of Ba1¹xCaxTiO3 (x = )”, Materials Transactions, Vol. 56, No. 9 (2015) pp. 1374 to 1377. 2. Van Khien Nguyen, Thi Hong Phong Le, Thi Kim Chi Tran, Van Chuong Truong and Van Hong Le, “Influence of Ca Substitution on Piezoelectric Properties of Ba1xCaxTiO3” Journal of electronic materials, DOI: (2017). 3. Nguyen Van Khien, Than Trong Huy, Le VanHong, “AC conduction of Ba1-xCaxTiO3 and BZT-BCTx”, Physica B, S0921-4526(17)30193-X (2017). Articles published in domestic magazines 4. Nguyễn Văn Khiển, Vũ Đình Lãm và Lê Văn Hồng, “Ba1- xCaxTiO3 và tính chất điện môi của chúng”, Tạp chí Khoa học và Công nghệ 52(3C) (2014) 725-730 5. Nguyen Van Khien, Vu Dinh Lam
