高里存
,
毛向阳
,
张永治
,
刘金华
,
孙义
硅酸盐通报
doi:10.3969/j.issn.1001-1625.2006.02.006
以锆英石、电熔PSZ-Mg,电熔PSZ-Ca为原料,Y2O3为添加剂,试制出高致密体的ZrSiO4-ZrO2质中间包上水口,研究了颗粒级配、成型压力和Y2O3添加剂对ZrSiO4-ZrO2质中间包上水口性能的影响,并利用XRD进行物相分析,利用SEM和EDS进行显微结构分析.实验结果表明:选用合理的级配和成型压力能够获得高性能的材料,Y2O3对锆质材料具有烧结剂的作用,同时也能促进ZrSiO4的分解.
关键词:
中间包上水口
,
ZrSiO4
,
ZrO2
,
热震稳定性
Mustafa BOZ
,
Adem KURT
材料科学技术（英文）
Friction-wear properties of the ZrSiO4 reinforced samples were measured and compared with those of plain bronze based ones. For this purpose, density, hardness, friction coefficient wear behaviour of the samples were tested. Microstructures of samples before and after sintering and worn surfaces were also investigated by scanning electron microscopy (SEM), and the wear types were determined. The optimum friction-wear behaviour was obtained in the sample compacted at 500 MPa and sintered at 820oC. Density of the final samples decreased with increasing the amount of reinforcing elements (ZrSiO4) before pre-sintering. However after sintering, there is no change in density of the samples including reinforcing elements (ZrSiO4). With increasing friction surface temperature, a reduction in the friction coefficient of the samples was observed. However, the highest reductions in the friction coefficients were observed in the as-received samples containing 0, 5% reinforced ZrSiO4. The SEM images of the sample indicated that while bronze-based break lining material without ZrSiO4showed abrasive wear behaviour, increasing the amount of ZrSiO4resulted a change in abrasive to adhesive wear mechanism. All samples exhibited friction-wear values, which were within the values shown in SAE-J661 standard. With increasing the amount of reinforcing ZrSiO4, wear resistance of the samples was increased. However samples reinforced with 5% and 6% ZrSiO4showed the best results.
关键词:
Friction materials
,
null
,
null
,
null
,
null
喻佑华
,
刘建磊
,
熊甜甜
硅酸盐通报
以碳酸锆铵((NH4)2ZrO(CO3)2)和硅酸钠(Na2SiO3·9H2O)为原料,十二烷基硫酸钠(C12H25 SO4Na)为分散剂,LiF作矿化剂,采取溶胶-凝胶分步包裹法制备ZrSiO4包裹Ce2S3色料.本文研究了制备工艺条件对其合成的影响,并利用X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)、综合热分析(DTA-TG)等测试手段对实验样品进行表征及分析.实验结果表明:溶胶-凝胶分步包裹法能对Ce2 S3色料形成较致密的ZrSiO4包裹层,在750℃的弱还原气氛中煅烧30 min,能合成桃红色的ZrSiO4包裹Ce2S3色料且能使该包裹色料的热稳定性提高到1200℃以上.
关键词:
溶胶-凝胶分步包裹法
,
硅溶胶
,
硅酸锆
,
硫化铈
,
氟化锂
张筱君
,
陈婷
,
江伟辉
,
刘健敏
,
查剑锐
人工晶体学报
采用正硅酸乙酯为碳源和硅源,四氯化锆为锆源,LiF为矿化剂,通过非水解溶胶-凝胶法(NHSG)制备了硅酸锆包裹炭黑(C@ZrSiO4)色料.通过XRD和SEM研究了前驱体和矿化剂浓度对硅酸锆合成及显微形貌的影响,同时采用CIE-L*a+b+色度仪考察了该色料的色度.实验结果表明,正硅酸乙酯中的乙氧基原位炭化成细小的碳粒作为发色基团,同时与氯化锆通过非水解溶胶-凝胶反应生成硅酸锆均匀包裹于炭黑颗粒表面.随着前驱体浓度的增大原位碳含量增加,C@ZrSiO4色料黑度提高;前驱体浓度高于3mol·L-1时样品颗粒团聚严重,同时过厚的包裹层不利于色料发色.经氮气气氛900℃热处理2h,空气气氛800℃热处理2h后制备出的C@ZrSiO4黑色包裹色料具有良好的色度值,L* =44.54,a*=0.82,b*=2.84,施于透明基础釉中经1200℃煅烧仍能保持优异的呈色能力.
关键词:
黑色色料
,
非水解溶胶-凝胶法
,
硅酸锆
,
正硅酸乙酯
王坚青
,
卢建树
,
冯燕
材料导报
用溶胶-凝胶法在低温下制备了ZrSiO4粉体,研究了锆/硅/锂原子比及热处理温度对于合成硅酸锆粉体的影响.试验结果表明,Si(OC4H9)4、ZrOCl2和LiCl的最佳物质的量比为1.2:1:0.5,所得凝胶在800℃热处理条件下煅烧3h,可制得高纯度的硅酸锆粉体.
关键词:
溶胶-凝胶法
,
低温
,
硅酸锆
