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用纳米粉制备厚膜敏感陶瓷材料

发布时间:2008/6/5 0:00:00 访问次数:442

王梦魁1,王志凡1,刘文磊2
(1.锦州师范学院物理系,辽宁 锦州 121003;
2.丹东国通电子元件有限公司,辽宁 丹东 118002)

1introduction


with the development of sensing technology,people are more and more demanding about sensors,especially for fitting in computers,high property and miniaturized sensors. thickfilm sensing materials have vast developing prospects,because the technology of making thickfilm sensing materials is easy to learn and a large scale production can be easily realized. in recent years,with the fast development of nanomaterial and nanotechnology,many technological puzzles can be readily solved. for instance,in the past,it was difficult to make ba1-xsrxtio3 base sensitive ceramics into low resistivity thickfilm material,but now they can be made into nanogranules,and the electric polarization strength of the material will be improved obviously. in this way,thickfilm material of low room temperature resistivity and excellent properties will surely be made. the way of preparing ba1-xsrxtio3 and(v1-xcrx)2o3 double base composite material with nanopowders was discussed in this study.

2experimentsand measured results

2.1preparing ba1-xsrxtio3 micro powders through chemical coprecipitation


the materials for making ba1-xsrxtio3 micropowders were barium chloride(bacl2),strontium chloride(srcl2)and titanium chloride(ticl4),oxalic acid was precipitant. the chemical equations were as follows

ticl4+(1-x)bacl2+xsrcl2+2(h2c2o4·2h2o)+2h2o=ba1-xsrxtio(c2o4)2·4h2o+6hcl+h2o (1)

ba1-xsrxtio(c2o4)2·4h2o+o2=ba1-xsrxtio3+4h2o+4co2↑(2)

the equations above were the theoretical basis for calculating the composition and operating the process when preparing the micropowders. the process was shown in fig.1.


the average diameter of the ba1-xsrxtio3 micropowders attained with this method was shorter than 05 μm when they were measured by type wlp208 average granules measuring instrument. the distribution was shown in fig

王梦魁1,王志凡1,刘文磊2
(1.锦州师范学院物理系,辽宁 锦州 121003;
2.丹东国通电子元件有限公司,辽宁 丹东 118002)

1introduction


with the development of sensing technology,people are more and more demanding about sensors,especially for fitting in computers,high property and miniaturized sensors. thickfilm sensing materials have vast developing prospects,because the technology of making thickfilm sensing materials is easy to learn and a large scale production can be easily realized. in recent years,with the fast development of nanomaterial and nanotechnology,many technological puzzles can be readily solved. for instance,in the past,it was difficult to make ba1-xsrxtio3 base sensitive ceramics into low resistivity thickfilm material,but now they can be made into nanogranules,and the electric polarization strength of the material will be improved obviously. in this way,thickfilm material of low room temperature resistivity and excellent properties will surely be made. the way of preparing ba1-xsrxtio3 and(v1-xcrx)2o3 double base composite material with nanopowders was discussed in this study.

2experimentsand measured results

2.1preparing ba1-xsrxtio3 micro powders through chemical coprecipitation


the materials for making ba1-xsrxtio3 micropowders were barium chloride(bacl2),strontium chloride(srcl2)and titanium chloride(ticl4),oxalic acid was precipitant. the chemical equations were as follows

ticl4+(1-x)bacl2+xsrcl2+2(h2c2o4·2h2o)+2h2o=ba1-xsrxtio(c2o4)2·4h2o+6hcl+h2o (1)

ba1-xsrxtio(c2o4)2·4h2o+o2=ba1-xsrxtio3+4h2o+4co2↑(2)

the equations above were the theoretical basis for calculating the composition and operating the process when preparing the micropowders. the process was shown in fig.1.


the average diameter of the ba1-xsrxtio3 micropowders attained with this method was shorter than 05 μm when they were measured by type wlp208 average granules measuring instrument. the distribution was shown in fig
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