摘要
以锰渣为主要原料,添加适当滑石、铝矾土、石英,在1 100～1 200℃温度内采用固相烧结而合成了钙长石、顽辉石陶瓷。结果表明,单相钙长石在1 100～1 200℃烧结温度内均能生成,而顽辉石相的烧结温度需超过1 140℃,烧结温度达1 200℃则会出现过烧现象。同时,原料中的重金属离子Mn2+能够溶解到产物相的晶体结构中而实现对锰污染的"解毒"。热震测试表明,随热震次数增加,1 160℃温度下烧成的钙长石/顽辉石复相陶瓷的强度先降低,后逐渐回升并趋于稳定。经30次热循环后材料的抗折强度仍高达102.45 MPa,相对于热震前仅减少2.21MPa,损失率仅2.11%。热震类似于淬火强化,材料优良的抗热震性能与钙长石、顽辉石较低的热膨胀系数有关。
Using manganese residue as the main material,along with some talc,bauxite and quartz,the anorthite and enstatite ceramics were produced at 1 100-1 200℃by the solid phase sintering.It is found that the monophased anorthite could be systhesized at 1 100-1 200℃sintering temperatures,but enstatite phase could be fabricated only the sintering temperature exceeding 1 140℃,and the“overburning”would occur once the temperature reaching 1 200℃.Also,the heavy metallic ion Mn 2+in the green compact can dissolve into the crystalline lattice of product,which realizes the“detoxication”to Mn pollution.The thermal shock testing shows that,with the thermal shock number rising,the strength of anorthite/enstatite multiphase ceramics synthesized at 1 160℃lowed down firstly,and then gradually rose again and tended to stability.After 30 thermal cycles,the bending strength of composite still reached 102.45 MPa,only 2.21 MPa decrease and 2.11%loss comparing to before thermal shock.Thermal shock is similar to the quenching strengthening,and the low thermal expansivities of anorthite and enstatite are also responsible for the excellent thermal shock resistance of composite.
作者
宋谋胜
张杰
李勇
王应
SONG Mousheng;ZHANG Jie;LI Yong;WANG Ying(Department of Physics and Electronic Engineering,Tongren University,Tongren 554300,China)
出处
《功能材料》
EI
CAS
CSCD
北大核心
2018年第10期160-165,共6页
Journal of Functional Materials
基金
贵州省自然科学技术联合基金资助项目(2017GZ81277)
贵州省科研创新人才团队资助项目(黔教合人才团队字[2014]40)
关键词
锰渣
钙长石/顽辉石
烧结
热震
机制
manganese residue
anorthite/enstatite
sintering
thermal shock
mechanism
