• Journal of the Korean Ceramic Society
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• v.38 no.5
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• pp.438-445
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• 2001

600 W의 마이크로파 출력 하에서 PbO, V$_2$O$_{5}$, TeO$_2$ 및 V$_2$O$_{5}$-PbO-TeO$_2$성분들의 마이크로파 발열 특성을 조사하였다. V$_2$O$_{5}$ 성분의 높은 마이크로파 흡수능에 기인하여 V$_2$O$_{5}$-PbO-TeO$_2$유리상 시편들은 마이크로파를 흡수하여 주어진 온도까지 직접 가열되었다. XRD, OM, SEM 및 고전압 발생 측정기를 통하여 재래식 열 및 마이크로파 공정에서 열처리된 시편들의 결정화 및 전기 전도도의 특성을 비교 조사하였다. PbV$_2$O$_{6}$ 및 Pb$_4$V$_2$O$_{9}$ 결정상들이 마이크로파 열처리된 시편에서는 존재하였다. 그러나, 재래식 열처리된 시편들에서는 존재하지 않는다는 것을 확인하였고, 재래식 열처리된 시편들에 비하여 마이크로파 열처리된 시편들의 전기 전도도 값이 상대적으로 높았다.

• Proceedings of the Korean Ceranic Society Conference
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• 2000.10a
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• pp.80.2-80
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• 2000

• Nuclear Engineering and Technology
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• v.51 no.8
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• pp.2005-2012
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• 2019

This work investigated the radiation attenuation characteristics of three series of tellurite glass systems with the following compositions: 30PbO-10ZnO-xTeO₂-(60-x)B₂O₃ where x = 10, 30, 40, 50 and 60 mol%, xBaO-xB₂O₃-(100-2x)TeO₂ with x = 15-40 mol% and 50ZnO-(50-x)P₂O₅-xTeO₂, where x = 0, 10, .40 mol%. The results revealed that the attenuation parameters in all the samples decrease with increase in the energy, which implied that all the samples have better interaction with gamma photons at low energies and thus higher photon attenuating efficiency. From the three systems, the samples coded as PbZnBTe60, BaBTe70 and ZnPTe40 have the lowest half value layer values and accordingly have superior photon attenuation efficacy. The maximum effective atomic number values were found for energy less than 0.1 MeV particularly near the K-edges absorption of the heavy atomic number elements such as Te, Ba and Pb. At the lowest energy, the Z_eff values are found in the range of 62.33-66.25, 49.43-50.81 and 24.99-35.83 for series 1-3 respectively. Also, we found that the density of the glass remarkably affects the photon attenuation ability of the selected glasses. The mean free path results showed that the PbO-ZnO-TeO₂-B₂O₃ glass system has better radiation shielding efficiency than the glass samples in series 2 and 3.