Behavior of Talc in Formation of Cordierite Ceramics
Behavior of Talc in Formation of Cordierite Ceramics
复制标题
滑石粉在堇青石陶瓷形成中的行为
DOI：
10.2109/jcersj.102.18
复制
发表时间：
1994
影响因子：
1.1
通讯作者：
K. Hamano
中科院分区：
文献类型：
--
作者：
Masae Nakahara;Yutaka Hashizuka;Y. Kondo;K. Hamano
为了考察堇青石陶瓷坯体中气孔的形成，采用SEM、XRD和EPMA等手段研究了烧结过程中滑石粉颗粒在坯体中的熔融行为及其与气孔形成的关系。根据MgO-Al_2 O_3-SiO_2系相图，认为氧化铝的加入降低了滑石粉的熔点。在1250-1350°C范围内对堇青石和氧化铝两种含5wt%粗滑石粉的试样进行了烧成。XRD和SEM观察结果表明，随着基体相氧化铝含量的增加，滑石粉的熔点降低。用电子探针分析了镁铝的分布，结果表明，滑石粉和氧化铝的共晶熔体渗透到周围的基体相中，并留下气孔。
To examine formation of pores in the cordierite body consisting of kaolin, talc and alumina, melting behavior of talc particles in the body during firing and its relation to the pore formation were studied by means of SEM, XRD and EPMA. According to the phase diagram of MgO-Al2O3-SiO2 system, it was considered that the melting temperature of talc is lowered by the addition of alumina. Two kinds of specimens of cordierite and alumina containing 5wt% coarse talc particles were fired in the range of 1250-1350°C. Results of experiments by XRD and SEM observations showed that the melting point of talc particles decreased with increase in alumina content in the matrix phase. Distribution of Mg and Al measured by EPMA showed that the eutectic melt of talc and alumina penetrated into the surrounding matrix phase and left pores behind them.