摘要
以CaCO3,SiO2,H3BO3为原料,采用无压烧结法,分别在3个不同的烧成条件下,低温快速烧成制备了CaO–SiO2–B2O3系陶瓷样品,所得样品在室温下快速冷却。测定了该体系的烧结性能和样品的体积电阻率,并探讨了其变化规律。结果表明:按照一定比例复合添加ZnO和MgO,对CaO–SiO2–B2O3系陶瓷具有明显的助烧作用;在添加量少于6.0%(质量分数,下同),同比例复合添加ZnO,MgO时较相应单一添加ZnO(为同比例复合添加ZnO,MgO时质量的1/2)所得样品的体积电阻率大。当添加6.0%ZnO,6.0%MgO时,在3种烧成条件下,均可制得体积密度较大、吸水率较小、体积电阻率较大(>1011Ω·cm)的致密烧结体。
CaO--SiO2-B2O3 system ceramic samples were prepared by fast firing at low temperature and pressureless sintering and using compacted powders comprised of CaCO3, SiO2 and H3BO3 under three different firing conditions, and the samples were cooled rapidly in air. The sintering properties and volume resistivity of these samples were examined. The results show that the samples with the addition of ZnO and MgO powders can be sintered at low temperature; the volume resistivity of the samples with the addition of equal proportions of ZnO and MgO was greater than that of samples with only ZnO added （half of the mass of the addition of equal proportions of ZnO and MgO） before the dosage reached 6.0% （in mass, the same below）. Samples with 6.0% ZnO and 6.0% MgO addition sintered under three different firing conditions all have a larger volume density, a low rate of water absorption and greater volume resistivity （〉10^12 Ω·cm）.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2008年第8期1140-1143,1147,共5页
Journal of The Chinese Ceramic Society
基金
江苏省科技厅重点基金(BK2007724)
江苏省无机及复合新材料重点实验资助项目
关键词
低温快速烧成
吸水率
体积密度
体积电阻率
fast fired at low temperature
rate of water absorption
volume density
volume resistivity
