화학공학소재연구정보센터
Applied Chemistry for Engineering, Vol.27, No.6, 612-619, December, 2016
폐 LCD 유리를 이용한 흡음특성을 갖는 붕규산유리발포체 제조
Preparation of Borosilicate Foamed Glass Body with Sound Absorption Characteristics by the Recycling Waste Liquid Crystal Display Glass
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초록
폐 LCD 판넬로부터 회수된 폐 붕규산유리를 이용하여 흡음특성을 갖는 알루미늄 함유 붕규산유리발포체의 제조 가능성을 조사하였다. 입도 325 mesh 이하의 크기로 분쇄 조절된 폐 붕규산유리분말 100 g에 대해 발포제로서 탄소분을 0.3중량 분율, Na2CO3, Na2SO4, CaCO3를 각각 1.5중량 분율, 기공조절제로서 H3BO3 및 Al2O3를 각각 6.0 및 3.0 중량분율이 되도록 첨가한 원료 유리분말을 발포소성온도 950 °C에서 20 min간 발포를 진행함으로서 개기공률 45%를 갖는 발포체를 제조하였으며 이 경우 흡음률 0.5~0.7의 흡음 특성을 갖고 있음을 보여 주었다. 아울러 이 흡음성능을 지닌 알루미늄 함유 붕규산유리발포체는 밀도 0.21 g/cm3, 굽힘강도 55 N/cm2 이상, 압축강도 298 N/cm2 이상의 우수한 물성을 가지고 있어 다양한 용도에 내화학성 및 내열성의 흡음체로 사용될 수 있다.
In this research, an alumino-borosilicate foamed glass with sound absorption property was prepared using the waste borosilicate glass obtained from the recycling process of waste liquid crystal display (LCD) panel. A 100 g of pulverized waste borosilicate glass with the particle size of under 325 mesh, was mixed with 0.3 g (wt/wt) of graphite, each 1.5 g (wt/wt) of Na2CO3, Na2SO4 and CaCO3 as a foaming agent, and 6.0 g (wt/wt) of H3BO3 and 3.0 g (wt/wt) of Al2O3 as a pore control agent. Following mixture was under the foaming process for 20 minutes at a foaming temperature of 950 °C. The result yielded the foaming agent with 45% of the opened porosity and 0.5-0.7 of the sound absorbing coefficient. This alumino-borosilicate foamed glass with the sound absorption property showed excellent physical and mechanical properties such as density of 0.21 g/cm3, bending strength of 55 N/cm2 and compression strength of 298 N/cm2 which can be ideally used as sound absorption materials with heat-resisting and chemical-resisting property.
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