Abstract
The report describes the solid reaction between TiO2 and BaCO3 under a CO2 laser irradiation. The powders of TiO2 and BaCO3 are mixed for a compaction and the green pellets (thickness; 0.95mm) were irradiated with the powers of 1.14, 1.40, 1.85 and 2.14 kW/cm2. The temperatures were 1053-1500 K depending on the laser powers. The laser power more than 1.85 kW/cm2 led to the sintered body from the green pellet. The formation of BaTiO3 was identified with X-ray diffraction analysis. The scanning electron microscopy revealed that the product was the porous ceramics with necking between grains. The sintered density was as low as 60-70% TD. The permittivity of BaTiO3 after irradiation at 2.14 kW/cm2 was 80 approximately.
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