• Bulletin of the Korean Chemical Society
• /
• v.30 no.7
• /
• pp.1637-1640
• /
• 2009

• Proceedings of the Materials Research Society of Korea Conference
• /
• 2002.11a
• /
• pp.139-139
• /
• 2002

• Proceedings of the Materials Research Society of Korea Conference
• /
• 2008.05a
• /
• pp.36.1-36.1
• /
• 2008

• 대한핵의학회:학술대회논문집
• /
• 1972.11a
• /
• pp.68.3-69
• /
• 1972

• Bulletin of the Korean Chemical Society
• /
• v.15 no.10
• /
• pp.819-821
• /
• 1994

• Bulletin of the Korean Chemical Society
• /
• v.22 no.10
• /
• pp.1111-1119
• /
• 2001

• Proceedings of the Korean Radioactive Waste Society Conference
• /
• 2011.05a
• /
• pp.303-304
• /
• 2011

• Bulletin of the Korean Chemical Society
• /
• v.22 no.3
• /
• pp.318-320
• /
• 2001

• Transactions on Electrical and Electronic Materials
• /
• v.16 no.2
• /
• pp.86-89
• /
• 2015

Uniform ZrO₂ nanoballs were synthesized at 700℃ using the inverse replication method through a colloid-imprinted carbon (CIC) template. The structural, dielectric, and conducting properties of the ZrO₂ nanoballs were investigated and compared with those of ZrO₂ film prepared by sol-gel method and powdered ZrO₂ chemical. Both the monoclinic and cubic phases were found in the ZrO₂ balls and film but the ZrO₂ chemical showed a monoclinic phase, where the cubic structure is known to be formed at above 2,300℃. ZrO₂ nanoballs showed the lower dielectric property of k = 21.2 at 1 MHz because the 8-coordinated cubic phase in the ZrO₂ nanoball produced lower polarization than the polarization of the 7-coordinated monoclinic ZrO₂ chemical (k = 23.6). The dielectric stability was maintained in each ZrO₂ ball, film, and chemical under the applied forward and reverse voltage range (−5 to +5 V) at 1 MHz. The ionic conductivities were 7.86 × 10⁻⁸/Ω·cm for ZrO₂ nanoballs, 3.29 × 10⁻⁸/Ω·cm for ZrO₂ chemical, and 6.70 × 10⁻⁵/Ω·cm for the thickness of 1,053 nm ZrO₂ film at room temperature with the electronic contribution being less than 0.006%.

• The Korean Journal of Nuclear Medicine
• /
• v.15 no.1
• /
• pp.45-49
• /
• 1981

The hot spot on liver scan was demonstrated by many authors in various conditions such as SVC obstruction, Budd-Chiari syndrome, liver abscess, hemangioma of liver, hepatic venoocclusive diseases, IVC obstruction, and tricuspid insufficiency. And the appearance of hot spot in SVC obstruction is due to unsual collateral circulation. But there was no report of this hots pot on liver scan in our country. We have recently observed one patient with SVC obstruction who shows well-defined area of increased radioactivity between right and left lobe of liver on liver scan using $^{99m}Tc-tin$ colloid, and demonstrated collateral circulations with RI venography using $^{99m}Tc-O_4$. The injection site of radiocolloid was left antecubital vein. This hot spot did not appear when the radiocolloid was injected into right leg vein. We report here this hot spot on liver scan in SVC obstruction with review of some liter atures.