نبذة مختصرة : Research has been conducted on the effect of the addition of polyvinyl alcohol on the microscopic characteristics of BaTiO3 piezoelectric. The synthesis of barium titanate was carried out using the sol-gel method by mixing basic ingredients, such as barium carbonate, titanium dioxide, ammonium hydroxide, nitric acid, polyvinyl alcohol, and aquabidestilata which were heated on a magnetic stirrer with a temperature of 90˚C. The parameters that varied were the weight ratio of barium titanate and 10% polyvinyl alcohol (PVA) solution which were 1: 0 (control), 1: 1, and 1:2 with sintering temperature variations of 700˚C, 800˚C, and 900˚C respectively. In the thermal treatment process, conducted gases and moisture content removal process were conducted at a temperature of 150˚C for 1 hour, calcination process for 24 hours at a temperature of 250˚C, and sintering process with a variation of sintering temperature for 2 hours. XRD (X-Ray Diffraction) test results show that the BaTiO3 compound was formed after sintering at Temperatures of 700˚C, 800˚C, and 900˚C for 2 hours and a single BaTiO3 tetragonal phase was formed on a sample with BaTiO3: PVA ratio of 1: 0 at sintering temperature of 800˚C and 1: 1 with sintering temperatures of 800˚C and 900˚C. PSA (Particle Size Analyzer) test results indicate that BaTiO3 powder has particle size in the range of nanometers for 60% i.e. 50-95 nm and the remaining 40% are micro-sized i.e. 100-165 nm. Based on the result of density measurements, with a literature value of 6.02 grams / cm3, there is an average difference of 4 - 3 grams / cm3 or about 44% - 64% in the dry method and 0.5 - 2 grams / cm3 or about 7 % - 40% on wet method (Archimedes).
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