| Oxalic Acid법으로 합성한 $BaTiO_3$ 분말과 소결한 PTC 세라믹스에 대한 하소조건의 효과 |
| 이미재, 황선아, 최병현 |
| 국립공업기술원 요업기술원 |
| Effect of the Calcination Conditions for the Synthesized $BaTiO_3$ Powder and the Sintered PTC Ceramics by Oxalic Acid Method |
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| ABSTRACT |
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The characteristic of calcined BaTiO3 powder and sintered PTC ceramics was investigated varing with calcination temperature and time of BaTiO(C2O4)2.4H2O synthesized from BaCl2.2H2O, TiCl4, oxalic acid and ethanol by oxalic acid method. When the particle size was less than 0.1 ${mu}{textrm}{m}$ by controlling calcination temperature and time, the resistance at room temperature was measured very high (above M{{{{ OMEGA }}). However, when the calcined particle sizes ranged from 0.2 to 0.3 ${mu}{textrm}{m}$, the resistance was 100 {{{{ OMEGA }} (After sintering, the grain size was 10~30 ${mu}{textrm}{m}$ homogeneously with the addition of dopant in sintering, the resistivity, resistance, $alpha$ value and jumped to were 110{{{{ OMEGA }}.cm, 24$^{circ}C$/% and 106{{{{ OMEGA }}, respectively. |
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