รายละเอียดวารสารวิชาการ

  • ผศ.ดร. ผิวพรรณ ประจันทร์ศรี
  • สาขา ฟิสิกส์
  • -
  • piewpan.p@rmutk.ac.th

ชื่องานวิจัย ( Article Name)

Improvement in Electrical Properties of (Bi0.5Na0.5)TiO3 (BNT) Ceramics Using the SeedInduced Method

บทคัดย่อ ( Abstract )

(Bi0.5Na0.5)TiO3 (BNT) lead-free ceramics were prepared by the seedinduced technique using different particle sizes of BaTiO3 (BT) powder as seeds. The BT seeds was synthesized by the molten-salt method and then calcined at different temperatures of 750 (750BTs), 800 (800BTs) and 850 C (850BTs). The pure perovskite seeds (5 mol%) were mixed with the starting materials of the BNT system for conventional mixed oxide method. After that, the mixture was calcined and sintered at 900 C for 2 h and 1100 C for 2 h, respectively. From results it was found that the particle size of BT seed increased with calcine temperature increase from 750 to 850 C. The samples of non-BT seed (S0) and BT seed-added (S1, S2 and S3) showed pure perovskite phase. Average density values were in the range of 5.53-5.77 g/cm3. Dielectric constant (er) measured at room temperature (at 1 kHz) was in the range of 732.04-788.59. The dielectric loss (tand), remnant polarization (Pr) and coercive field (Ec) values decreased with the addition of BT seed. The highest piezoelectric coefficient (d33) 156 pC/N was obtained for the sample of 850BTs (S3).

เอกสารวิจัย ( Paper )

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ผู้เขียน ( Authors )

  • ผิวพรรณ ประจันทร์ศรี