低温燃烧合成堇青石粉及其性能研究

稀有金属材料与工程, 2009, 38(z2): 63-66.

低温燃烧合成堇青石粉及其性能研究

何英 ^1, , 周和平 ^2, , 黄兆龙 ^3, , 王寒风 ^4, , 翟凤瑞 ^5, , 郭俊明 ^6,

1.红河学院,云南,蒙自,661100

2.清华大学,北京,100084

3.红河学院,云南,蒙自,661100

4.清华大学,北京,100084

5.红河学院,云南,蒙自,661100

6.红河学院,云南,蒙自,661100;云南民族大学,云南,昆明,650031

基金项目: 国家自然科学基金重大研究计划面上项目(90610011) 云南省教育厅科学研究基金(08Y0340)

关键词：低温燃烧合成 , 堇青石 , 析晶过程 , 烧结特性 , 介电性能

Low-Temperature Combustion Synthesis of Cordierite Powder and Its Properties

He Ying ^1, , Zhou Heping ^2, , Huang Zhaolong ^3, , Wang Hanfeng ^4, , Zhai Fengrui ^5, , Guo Junming ^6,

1.红河学院,云南,蒙自,661100

2.清华大学,北京,100084

3.红河学院,云南,蒙自,661100

4.清华大学,北京,100084

5.红河学院,云南,蒙自,661100

6.红河学院,云南,蒙自,661100;云南民族大学,云南,昆明,650031

Keywords： low-temperature combustion synthesis , cordierite , crystallization process , sintering behavior , dielectric properties

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.

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.

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