CaF_2含量对熔融态高炉渣微晶玻璃析晶及性能的影响
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摘要
利用液态高炉渣为主要原料,采用熔融法制备了微晶玻璃。借助DSC、XRD、SEM等分析测试方法研究了CaF_2含量对高炉渣微晶玻璃析晶及性能的影响。试验结果表明,CaF_2能够有效降低微晶玻璃的形核析晶温度,促进微晶玻璃析晶。微晶玻璃中晶体含量随着CaF_2含量的增加而增加。当CaF_2含量小于4%时,微晶玻璃的晶相为透辉石、普通辉石和钙镁黄长石;当CaF_2含量大于4%时,析出了新晶相枪晶石。最终确定CaF_2的最佳添加量为6%,此时微晶玻璃结晶度高,平均晶粒粒度100 nm,体积密度2.81 g/cm3,吸水率0.04%,耐酸腐蚀性98.92%,耐碱腐蚀性99.98%,抗弯强度173.41 MPa。
The glass-ceramics were obtained successfully with molten blast furnace slag as the main raw materials by the melting method. Effect of CaF_2 on the crystallization temperature,crystal phase,microstructure and properties of glass-ceramics samples were analyzed by means of DSC,XRD,SEM and other methods as well. The results showed that the CaF_2 is not only helpful to decrease the nucleation and crystallization temperature for preparing glass-ceramics,but also promote to crystallize. The contents of crystals increased with the increase of CaF_2. The crystalline phases of the glass-ceramics were diopside,augite and akermanite-gehlenite with the content of CaF_2 less than 4%. Increasing the content of CaF_2to4%,a new phase-cuspidine generated in the glass-ceramics,and the content of cuspidine increased with the CaF_2 increasing. The glass-ceramics samples with good crystallinity, small grain size( average100nm),bulk density( 2. 81 g / cm3),water absorption( 0. 04%),acid corrosion( 98. 92%),alkali corrosion( 99. 98%) and bending strength( 173. 41 MPa) were prepared with 6% CaF_2.
The glass-ceramics were obtained successfully with molten blast furnace slag as the main raw materials by the melting method. Effect of CaF_2 on the crystallization temperature,crystal phase,microstructure and properties of glass-ceramics samples were analyzed by means of DSC,XRD,SEM and other methods as well. The results showed that the CaF_2 is not only helpful to decrease the nucleation and crystallization temperature for preparing glass-ceramics,but also promote to crystallize. The contents of crystals increased with the increase of CaF_2. The crystalline phases of the glass-ceramics were diopside,augite and akermanite-gehlenite with the content of CaF_2 less than 4%. Increasing the content of CaF_2to4%,a new phase-cuspidine generated in the glass-ceramics,and the content of cuspidine increased with the CaF_2 increasing. The glass-ceramics samples with good crystallinity, small grain size( average100nm),bulk density( 2. 81 g / cm3),water absorption( 0. 04%),acid corrosion( 98. 92%),alkali corrosion( 99. 98%) and bending strength( 173. 41 MPa) were prepared with 6% CaF_2.
引文
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[16]关振铎,张中太,焦金生.无机材料物理性能[M].北京:清华大学出版社,2011.
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[3]Ye C Q,He H,Shu H,et al.Preparation and properties of sintered glass-ceramics containing Au-Cu tailing waste[J].Material&Design,2015,86(5):782-787.
[4]Liu H Y,Lu H X,Chen D L,et al.Preparation and properties of glass-ceramics derived from blast-furnace slag by a ceramic-sintering process[J].Ceramics International,2009,35(8):3181-3184.
[5]Ozturk Z B,Gultekin E E.Preparation of cceramic wall tiling derived from blast furnace slag[J].Ceramics International,2015,41(9):12020-12026.
[6]Ding L F,Ning W,Wang Q W,et al.Preparation and characterization of glass-ceramic foams from blast furnace slag and waste glass[J].Materials Letters,2015,141:327-329.
[7]曹超,彭同江,丁文金.晶化温度对Ca O-Al2O3-Si O2-Fe2O3系粉煤灰微晶玻璃析晶及性能的影响[J].硅酸盐学报,2013,41(1):122-128.
[8]罗果萍,于文武,王艺慈,等.P2O5对包钢高炉渣微晶玻璃析晶行为的影响[J].硅酸盐通报,2013,32(2):283-288.
[9]Khater G A.Influence of Cr2O3,Li F,Ca F2and Ti O2nucleants on the crystallization behavior and microstructure of glass-ceramics based on blast-furnace slag[J].Ceramics International,2011,37(7):2193-2199.
[10]Mukherjee D P,Das S K.Si O2-Al2O3-Ca O glass-ceramics:Effects of Ca F2on crystallization,microstructure and properties[J].Ceramics international,2013,39(1):571-578.
[11]Bourtsalas A,Vandeperre L J,Grimes S M,et al.Production of pyroxene ceramics from the fine fraction of incinerator bottom ash[J].Waste Management,2015,45:217-225.
[12]Zhao L H,Li Y,Zhou Y Y,et al.Preparation of novel ceramics with high Cao content from steel slag[J].Materials&Design,2014,64:608-613.
[13]李保卫,王芳,陈建华,等.Cr2O3对白云鄂博西尾矿微晶玻璃显微结构及性能的影响[J].人工晶体学报,2014,43(3):642-67.
[14]李保卫,欧阳顺利,张雪峰,等.温度对Ca O-Mg O-Al2O3-Si O2系纳米晶玻璃陶瓷结构影响的拉曼光谱研究[J].光谱学与光谱分析,2014,34(7):1869-1872.
[15]Khater G A.Influence of Cr2O3,Li F,Ca F2and Ti O2nucleants on the crystallization behavior and microstructure of glass-ceramics based on blast-furnace slag[J].Ceramics International,2011,37(7):2193-2199.
[16]关振铎,张中太,焦金生.无机材料物理性能[M].北京:清华大学出版社,2011.