共查询到20条相似文献,搜索用时 103 毫秒
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
将金属Ni加入到(Ba,Sr)TiO3陶瓷基质中来制备低阻复合PTC材料.复合材料在石墨粉形成的弱还原气氛下烧成后,Ni主要以单质态存在.研究了添加Al2O3-SiO2-TiO2 (AST)与PbO-B2O3-ZnO-SiO2玻璃料对复合材料微观结构和电性能的影响.与AST一样,玻璃料可作为复合材料的烧结助剂,更突出的是玻璃料能实现金属Ni在陶瓷基质中的均匀分布.从烧结助剂引起的陶瓷基质和金属分布两方面的变化来讨论复合材料的电性能.采用玻璃料作为烧结助剂,复合材料获得了较低的室温电阻率和较高的升阻比. 相似文献
12.
多层陶瓷电容器(MLCC)端电极低温烧结技术仍是目前研究的重点与难点。为了改善MLCC低温烧结铜端电极的烧结形貌与质量,开发出适用于低温烧结的端电极铜浆的新型玻璃粉,探讨了玻璃粉的转变温度、含量、粒径以及玻璃粉与陶瓷基片的烧结润湿性与铜浆烧结特性之间的关系。此外,研究了铜粉形貌、粒径等对端电极烧结特性的影响。结果表明:当玻璃粉转变温度为577.6℃,铜浆中玻璃粉含量为质量分数10%(D50=2.0μm),类球形铜粉Cu-2和板状铜粉Cu-4的质量比为6∶4(D50=1.4μm)时,得到烧结质量最佳的MLCC铜端电极,其致密度高达99.87%。 相似文献
13.
14.
15.
16.
17.
从排胶和共烧两方面 ,研究了氮化铝 ( Al N) /玻璃复合材料的低温共烧。排胶研究结果表明 :流延坯片和银浆的排胶特性不同 ,氧化性气氛有利于两者的排胶。共烧研究表明 :Al N/玻璃复合系统的烧结为液相烧结 ;引入微氧烧结气氛将改变界面状况 ,有利于 Al N/玻璃复合材料和银共烧的实现 相似文献
18.
19.
Tatsuya Sakamoto Tsutomu Iida Yasuhiko Honda Mitsuhiro Tada Takeshi Sekiguchi Keishi Nishio Yasuo Kogo Yoshihumi Takanashi 《Journal of Electronic Materials》2012,41(6):1805-1810
The electrical and thermoelectric characteristics of n-type Mg2Si equipped with electrodes of Ni and the transition-metal silicides CoSi2, CrSi2, TiSi2, and NiSi were examined. To form the electrodes on the Mg2Si matrix, a monobloc sintering method, i.e., simultaneous sintering of the electrode material during Mg2Si sintering, was used. To obtain dense electrodes and to keep an appropriately low sintering temperature for the Mg2Si matrix, a Ni binder was used for the CoSi2, CrSi2, and TiSi2 monobloc sintering. The mixture ratio between the transition-metal silicide and the Ni was 50:50 in wt.%. The room-temperature I?CV characteristics of the fabricated CoSi2, CrSi2, and TiSi2 electrodes with the Ni binder and NiSi electrodes were considered to be adequate for practical applications in as much as ohmic contacts were obtained. The contact resistance at the Mg2Si/electrode interface decreased by 35% and 28%, respectively, for the CoSi2 and CrSi2 electrodes compared with our standard Ni electrode. The thermoelectric power output was measured at the practical operating temperature of 600?K, with ??T?=?500?K. The observed output powers for 3.0?mm?×?3.0?mm?×?7.5?mm samples equipped with CoSi2, CrSi2, and NiSi electrodes were 153?mW, 149?mW, and 125?mW, respectively, representing increases of 27%, 24%, and 4%, respectively, compared with the 120?mW measured for the sample with Ni electrodes. 相似文献
20.
采用传统陶瓷制备工艺制备了CaO掺杂的低温烧结(Ni0.2Cu0.2Zn0.6)1.02(Fe2O3)0.98(NiCuZn)系铁氧体材料,研究了CaO掺杂量对NiCuZn铁氧体电磁性能和微观结构的影响。结果表明:适量的CaO掺杂可以显著改善NiCuZn铁氧体的烧结性能和微观结构,进而影响其电磁性能。在CaO掺杂量为质量分数0.4%时,经885℃烧结3 h制得的NiCuZn铁氧体内部结构均匀致密并具有最佳的综合电磁性能,其起始磁导率、电阻率和功率损耗分别为354,5.6×1011.cm和214.5 kW/m3,另外,其与Ag电极的共烧匹配性良好。 相似文献