高铝陶瓷显微结构及制备工艺对金属化层性能影响的研究  

Effect of High Alumina Ceramic Microstructure and Preparation on Performance of Metal-ceramic Layer

作　　者：石棋[1] 郭志猛[1] 郝俊杰[1] 罗凌虹[2] 

机构地区：[1]北京科技大学,北京100083 [2]景德镇陶瓷学院,景德镇333001

出　　处：《人工晶体学报》2007年第6期1382-1385,共4页Journal of Synthetic Crystals

基　　金：国家自然科学基金资助(No.20476008)

摘　　要：通过配方及烧成工艺的改变,得到两种不同显微结构的高铝陶瓷材料,其一为晶粒大小均匀,边界清晰,晶粒堆砌结构;其二为晶粒大小不一,晶粒边界不清,甚至晶粒被包裹在玻璃相中,形成玻璃相堆积结构。测定了材料的抗折强度、体积电阻率、抗击穿强度、比重、金属化层抗张强度和气密性。分析了两种显微结构的成因及不同微观结构对陶瓷材料性能和金属化层性能的影响。实验证明:采用微粉氧化铝配料,利于获得金属化性能优良的细晶结构的高铝陶瓷材料;用粗粉氧化铝配料,并加入复合的添加剂,也可以获得细小晶粒堆砌结构的高铝陶瓷材料,这类结构高铝陶瓷材料的金属化层性能好。In the present paper, two kinds of high alumina ceramic materials with different structures were obtained through the change of formula and sintering schemes. The microstructure of one sample showed the crystalline grains were uniform in size and the body waspiled up by the crystalline grains. The microstructure of another one showed the crystalline grains were different in size, and the grains were surrounded by the glass phase, which formed the glass stacking structure. Some properties of the sintered samples such as fracture strength, volume resistivity, bulk density, tensile strength and helium leak density were measured. The results indicated that using fine alumina powder in formula was beneficial to obtaining high alumina ceramic materials with excellent metallization performance; while using coarse alumina with appropriate complex additives, high alumina ceramic materials with excellent performance also could be obtained.

关 键 词：高铝陶瓷 显微结构 金属化 

分 类 号：TQ174[化学工程—陶瓷工业]