http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
저온소성 프릿이 첨가된 MnWO<sub>4</sub>의 소결체의 습도특성
정병해,소지영,김형순,Jung, Byung-hae,So, Ji-young,Kim, Hyung-sun 한국재료학회 2003 한국재료학회지 Vol.13 No.2
A low melting borosilicate glass frit was used as an adhesion promoter, which enables $MnWO_4$to be sintered with in a reasonable sintering temperature range ($800∼1000^{\circ}C$). The glass was evaluated for glass transition temperature ($Τ_{g}$ X) and thermal expansion coefficient($\alpha$). Mechanical property (Vickers hardness), grain growth, the comparison of lattice parameter and pore distribution of sintered $MnWO_4$ with the frit were methodically discussed. As sintering temperature increased, a typical liquid phase sintering showed the rapid grain growth and high densification of X$MnWO_4$grain, improvement of hardness (until $920^{\circ}C$) and different pore size distribution. Resistance of sintered $MnWO_4$varied from 450k$\Omega$ to 8.8M$\Omega$ under the measuring humidify ranging from 30 to 90%. Thus, the results will contribute to the application of glass frit containing sensor materials and their future use.
나노 인덴터를 이용한 플라즈마 디스플레이 소자(PDP)내 격벽의 기계적 물성 평가
정병해,김형순,Jung, Byung-Hae,Kim, Hyung-Sun 한국재료학회 2003 한국재료학회지 Vol.13 No.1
For the rib materials in PDP(plasma display panel), an effective method to improve the mechanical properties is to form a composite material by reinforcing a glass matrix with rigid fillers, such as alumina and titania powders. In this study, two types of ribs with different volume percent of fillers and with different glass matrix were tested for hardness, Young's modulus with the Berkovich indentation. As a result, cracks appeared around at the load of 1345 mN for the dense type of rib, while porous one endured until 2427 mN without any crack formation. Young's modulus and hardness decreased at the range: 90∼65 GPa, 9∼4 GPa, respectively as a function of indent load. Thus, a new method with nanoindenter represents a possible evaluation method for mechanical properties of barrier ribs.
전재삼,차명룡,정병해,김형순 한국세라믹학회 2003 한국세라믹학회지 Vol.40 No.11
인삼염유리는 전자부품분야에서 저온소성유리로 그 활용범위가 넓은 편이나 높은 열팽창계수로 알칼리 산화물 등을 첨가하여 그 특성을 조정하고 있다. 본 연구에서는 P$_2$O$_{5}$-SnO-ZnO-SiO$_2$/B$_2$O$_3$ 유리계에 대하여 열적특성으로 선팽창계수와 유리전이온도, 용융온도 등을 측정하여 그들 값의 상관관계를 고찰하였다. 이러한 결과는 다른 인삼염 유리와 비교하였을때 선팽창계수와 유리전이온도의 곱이 일정한 값으로 나타나서 이들 중의 하나의 값으로부터 간접적으로 다른 변수를 측정 할 수 있는 한 방법이 될 수 있다. Phosphate glasses known for low melting temperature glasses in electrical parts has been recently used in wide area with modification of thermal properties using alkali oxides. It is our purpose to find a correlation between thermal expansion coefficient, glass transition temperature and melting temperature through investigating thermal properties in P$_2$O$\sub$5/-SnO-ZnO-SiO$_2$/B$_2$O$_3$. As a result, the product of thermal expansion coefficient and the glass transition temperature in the glasses is found to be a constant value would be a unique value for knowing one of thermal properties.
오영석,이용수,강원호,정병해,김형순 한국세라믹학회 2003 한국세라믹학회지 Vol.40 No.10
To develop mobile phone antenna modules, glass-ceramics composites that are 20∼80 dielectric constant materials which has been fabricated. The glass-ceramics composites were based in the BNT (BaO-Nd$_2$O$_3$-TiO$_2$), and properties-a sintering and dielectric property-were investigated in its composites according to the $K_2$O-CaO-P$_2$O$_{5}$ system glass frits. The prepared ceramics were sintered at 900∼120$0^{\circ}C$ with the glass frit contents ranging from 10 to 40 wt%. The shrinkage and relative density grew into increasing glass frits and sintering temperature. Sintered composites showed the tendency that the dielectric constant ($\varepsilon$$_{r}$) and quality factor (Q${\times}$f) decreased in increasing glass frits and sintering temperature. 본 연구에서는 모바일 폰 안테나 모듈용 유전체 재료를 개발을 위해 20∼80의 유전율을 가지는 유리-세라믹스 복합체를 제조하고자 하였다. BaO-Nd$_2$O$_3$-TiO$_2$계 세라믹스에 $K_2$O-CaO-P$_2$O$_{5}$계 글래스 프릿의 첨가를 통해 제조된 글래스-세라믹스 복합체의 소결특성과 유전특성을 조사하였다. BaO-Nd$_2$O$_3$-TiO$_2$계 세라믹스에 글래스 프릿을 10∼40 wt% 범위로 첨가하였고, 900∼120$0^{\circ}C$의 온도범위에서 소결하였다. 그 결과로서, $K_2$O-CaO-P$_2$O$_{5}$계 글래스 프릿의 첨가량이 증가하고 소결온도가 증가할수록 소결수축률과 상대밀도가 증가하였다. 또한 유전율($\varepsilon$$_{r}$)과 품질계수(Q${\times}$f)는 감소하는 경향을 나타내었다.