# 고전압 펄스 발생기를 위한 강유전체의 전압 출력 특성

• Accepted : 2013.08.27
• Published : 2013.10.01

#### Abstract

High power pulse generating technology is to accumulate the energy for relatively long and then to create a strong force by emitting the energy very fast. High power pulse generating technology has recently been using in various fields like environments, industry, research, military and so on. Numerous studies about high power pulse generators have already been performed and commercialized in various conditions. However, in aspect of their size and weight, it is hard to carry the generators which currently have been developed. For these reasons, din nations like America or Russia, the researches have been performed for Ferroelectric Generators(FEG), which have relatively simple structure and are economical. To realize the ferroelectric generator, in this study, we selected the PZTs which have different physical properties respectively, and then shocked them using explosives. The PZT samples with volumes of $0.31{\sim}0.94cm^3$ were depolarized by shocked and produced the waveform that have peak voltages of 4.28 ~ 15kV. The lowest relative permittivity sample generated much higher peak voltage. And sudden voltage drops which seem to be caused by dielectric breakdown were observed in some experiments using low young's modulus samples. Also, increase in thickness led to increase in peak voltage, but the ratio of the voltage rise did not reach the ration of the thickness increase.

#### Acknowledgement

Supported by : NIPA(National IT Industry Promotion Agency)

#### References

1. F. W. Neilson, "Effect of strong shock in ferroelectric materials", Bull. Amer. Phys. Soc., vol. 2, no. 2, p. 302, 1957.
2. C. E. Reynolds and G. E. Seay, "Multiple shock wave structures in polycrystalline ferroelectrics", J. Appl. Phys., vol. 32, no. 7, pp. 1401-1402, Jul. 1961. https://doi.org/10.1063/1.1736243
3. C. E. Reynolds and G. E. Seay, "Two-wave shock structures in the ferroelectric ceramics barium titanate and lead zirconate titanate", J. Appl. Phys., vol. 33, no. 7, pp. 2234-2241, Jul. 1962. https://doi.org/10.1063/1.1728934
4. W. J. Halpin, "Currents from a shock-loaded short-circuited ferroelectric ceramic disk", J. Appl. Phys., vol. 37, no. 1, pp. 153-163, Jan. 1966. https://doi.org/10.1063/1.1707798
5. J. T. Cutchen, "Polarity effects and charge liberation in lead zirconate titanate ceramics under high dynamic stress", J. Appl. Phys., vol. 37, no. 13, pp. 4745-4750, Dec. 1966. https://doi.org/10.1063/1.1708130
6. W. J. Halpin, "Resistivity estimates for some shocked ferroelectrics", J. Appl. Phys., vol. 39, no. 8, pp. 3821-3826, Jul. 1968. https://doi.org/10.1063/1.1656860
7. P. C. Lysne, "Dielectric breakdown of shock-loaded PZT 65/35", J. Appl. Phys., vol. 44, no. 2, pp. 577- 582, Feb. 1973. https://doi.org/10.1063/1.1662227
8. F. Bauer and K. Vollrath, "Behaviour of non-linear ferroelectric ceramics under shock waves", Ferroelectrics, vol. 12, no. 1-4, pp. 153-156, 1976. https://doi.org/10.1080/00150197608241413
9. F. Bauer and K. Vollrath, "New aspects in ferroelectric energy sources for impact fuses," Propellants, Explosives, Pyrotechnics, vol. 1, no. 3, pp. 55-59, 1976. https://doi.org/10.1002/prep.19760010304
10. V. N. Mineev and A. G. Ivanov, "Electromotive force produced by shock compression of a substance", Sov. Phys.-Usp., vol. 19, no. 5, pp. 400 -419, May 1976. https://doi.org/10.1070/PU1976v019n05ABEH005260
11. G. E. Duvall and R. A. Graham, "Phase transitions under shock-wave loading", Rev. Mod. Phys., vol. 49, no. 3, pp. 523-579, Sep. 1977. https://doi.org/10.1103/RevModPhys.49.523
12. E. Z. Novitskii, V. D. Sadunov, and G. Y. Karpenko, "Behavior of ferroelectrics in shock waves", Combustion, Explosion, Shock Waves, vol. 14, no. 4, pp. 505-516, Jul. 1978. https://doi.org/10.1007/BF00742960