• Proceedings of the Korean Ceranic Society Conference
• /
• 2000.10a
• /
• pp.89.1-89
• /
• 2000

• Proceedings of the Materials Research Society of Korea Conference
• /
• 1997.10a
• /
• pp.73-73
• /
• 1997

• Bulletin of the Korean Chemical Society
• /
• v.31 no.11
• /
• pp.3451-3453
• /
• 2010

• Proceedings of the Materials Research Society of Korea Conference
• /
• 1999.05a
• /
• pp.50-50
• /
• 1999

• Proceedings of the Korean Ceranic Society Conference
• /
• 2002.10a
• /
• pp.184.2-184
• /
• 2002

• Proceedings of the Korean Ceranic Society Conference
• /
• 2003.10a
• /
• pp.106.2-106
• /
• 2003

• Journal of the Korean Ceramic Society
• /
• v.45 no.6
• /
• pp.320-323
• /
• 2008

The preparation of $Zn_xMn_{1-x}Fe_2O_4$ nanoparticles in an Igepal CO-520-cyclohexane water reverse micelle solution has been studied. The transmission electron microscopy and X-ray diffraction pattern analyses revealed the resulting particles to be $Zn_xMn_{1-x}Fe_2O_4$. The average size and distribution of the synthesized particles calcined at $500^{\circ}C$ for 5 h were in the range of 10 to 20 nm and broad, respectively. The phase of the synthesized particles was crystalline, the magnetic behavior of the synthesized particles was ferromagnetic. The effect of the synthesis parameters, such as the molar ratio of water to surfactant and calcination temperature, is discussed.

• Korean Journal of Materials Research
• /
• v.2 no.4
• /
• pp.263-269
• /
• 1992

Low-firing dielectric materials with negative small temperature coefficients were investigated. The newly developed materials are based on Ti$O_2$(100-x)/ CuOx(X=1~5wt%) with small amount of Mn$O_2$ additive. The sample without CuO was not sintered at 90$0^{\circ}C$. As CuO content was increased the sample could be sintered at low temperature. However, the dielectric constant was decreased and the dielectric loss was increased. In the case of adding 3wt% CuO and 0.6wt% Mn$O_2$, the dielectric constant and the Q values appeared very high.

• 한국정보디스플레이학회:학술대회논문집
• /
• 2009.10a
• /
• pp.272-275
• /
• 2009

A new green phosphor, ($Mg_{1-x-yZnx)$)$Al_2O_4:Mn^{2+}{_y}$ (0 x 0.6, 0.001 y 0.01), was synthesized by a flux-assisted solid reaction and its vacuum ultraviolet (VUV) excitation and emission characteristics were examined in this study. The chromaticity and peak intensity of the $(Mg_{0.79}Zn_{0.2})Al_2O_4:Mn^{2+}{_{0.01}}$ (x = 0.177, y = 0.745) phosphor were found to be more desirable than that of $Zn_2SiO_4:Mn^{2+}$ (x = 0.216, y = 0.72) phosphor as a green primary color.

• Journal of the Korean institute of surface engineering
• /
• v.24 no.1
• /
• pp.1.2-1.2
• /
• 1991

The formation of managanese ferrite has been performed to investigate some properties according to the variation of compositions, pH, current density by electrolysis. It has been found that the amount of oxidized weight of anode were increased with increasing current density. The amount of oxidized weight of anode were most in pH10. As the result of X-ray diffraction Mn Fe2O4 crystal composition in pH13. When the particles of Mnx Fe3-x O4 were heated at 30$0^{\circ}C$, it has been shown typical MnFe2O4(JCPDS Card No. 10-319) in X-1 composition. As the result of SEM observation, the size of MnFe2O4 particles were about 0.1$\mu\textrm{m}$, the shape of particles were spherical type. According to the above mentioned experimental condition, 0.1-0.5$\mu\textrm{m}$ sub-micron particles of manganese ferrite were formed from the wasted manganese dry cell, through washing longrightarrow reduction longrightarrow electrloysis.