CAJ | 학술논문

以硝酸铝、硝酸镁和硅酸为原料,尿素为燃料,硝酸铵为燃烧助剂,低温燃烧合成了MgO-Al_2O_3-SiO_2(MAS)玻璃粉.用DTA、XRD、TMA、SEM等研究了其析晶过程、烧结特性和介电性能.结果表明:该玻璃粉可在低于1000 ℃的温度下烧结;烧结过程中首先析出μ堇青石,然后转变成μ-堇青石;950和1000 ℃烧结的堇青石基微晶玻璃具有低的介电常数(4.00～4.96, 1 MHz)和介质损耗(约0.003, 1 MHz),高的烧结密度(>理论密度的98%),可用于电子封装领域.
이초산려、초산미화규산위원료,뇨소위연료,초산안위연소조제,저온연소합성료MgO-Al_2O_3-SiO_2(MAS)파리분.용DTA、XRD、TMA、SEM등연구료기석정과정、소결특성화개전성능.결과표명:해파리분가재저우1000 ℃적온도하소결;소결과정중수선석출μ근청석,연후전변성μ-근청석;950화1000 ℃소결적근청석기미정파리구유저적개전상수(4.00～4.96, 1 MHz)화개질손모(약0.003, 1 MHz),고적소결밀도(>이론밀도적98%),가용우전자봉장영역.
The MgO-Al_2O_3-SiO_2(MAS) glass powder have been synthesized by low-temperature combustion technique using magnesium nitrate, aluminium nitrate, silicic acid as starting material, urea as fuel and ammonium nitrate as combustion aid. The crystallization process, sintering behavior and dielectric properties were investigated by means of DTA, XRD, TMA and SEM techniques. The results showed that the glass could be sintered at lower than 1000 ℃. The μ-cordierite crystallite was first crystallized from glass and then transformed into μ-cordierite phase during sintering process. The obtained cordierite-based glass-ceramics sintered at 950 ℃ and 1000 ℃ have low dielectric constant (4.00 ～ 4.96 at 1 MHz), low dielectric dissipation factor (≈ 0.003) and high sintering density (which is above 98% of the theoretical density), which can be used for electronic packaging.