共查询到20条相似文献,搜索用时 93 毫秒
1.
介绍了太阳能电池浆料用无铅电子玻璃粉的研制过程。当Bi2O3的质量分数在60%,B2O3在10%,ZnO在10%,SiO2在15%,其它在5%时,可获得膨胀系数在6.0×10-6/℃,软化点在500~510℃,玻化温度在(600±10)℃,附着力优良的无铅玻璃粉。用该玻璃粉制备的铝电子浆料印刷在125 mm×125 mm单晶硅上,烧结后,开路电压为0.630 V,短路电流为5.640 A,串联电阻为5.5Ω,并联电阻为17.8Ω,漏电流为0.464 mA,填充因子为78.50%,光电转换效率为18.01%,翘曲度不超过1.1 mm,附着力和耐水煮性合格。 相似文献
2.
3.
无铅导电银浆的制备及其烧结工艺的研究 总被引:1,自引:0,他引:1
采用熔融冷却法制备了Bi2O3-SiO2-B2O3-ZnO系无铅低熔玻璃粉,固定浆料配比及制备工艺,将无铅玻璃粉、自制银粉和有机载体混合,经三辊碾磨机轧制成无铅导电银浆料。银浆料通过丝网印刷法印刷在玻璃基体上,在指定温度下保温烧结。采用XRD、DTA和SEM等手段分析了成分变化对无铅低熔玻璃粉软化温度和析晶温度的影响;采用差热分析法(TG、DTA)、SEM、四探针法、焊接法等研究了烧结温度和保温时间对烧成银膜导电性和附着力的影响。结果表明:无铅低熔玻璃粉中n(Bi3+)∶n(Si4+)∶n(B3+)∶n(Zn2+)=40∶20∶30∶10,银浆料的最佳烧结温度为700℃,最佳保温时间为15 min。 相似文献
4.
5.
6.
7.
8.
9.
《现代塑料加工应用》2007,19(6):7-7
据“British Plastics & Rubber,2007,(7/8):11”报道,Basell公司推出高密度聚乙烯(HDPE)新牌号Hostalen ACP6031D,特点为高耐环境应力开裂性(EScR)和高刚性,新牌号是采用Basell公司专有的Hostalen Adranced Cascade工艺制备的树脂,据称采用该工艺生产的HDPE树脂比同样密度的一般HDPE的ESCR高10%。 相似文献
10.
本文通过真空熔炼炉冶炼得到Fe—Ni—Cu合金。测合金的成分和合金的膨胀系数,来研究Cu是否可以取代Ni元素满足低膨胀系数合金的性能要求,从而降低Fe—Ni低膨胀合金的成本。结果表明,Cu元素一定程度会增大低膨胀合金的线膨胀系数,合金的成分为Fe57.67%,Ni37.7%,Cu1.66%时合金在150℃时的膨胀系数为2.9×10^6k^-1,可以考虑以Cu代替部分Ni来降低Fe—Ni合金的成本。 相似文献
11.
12.
The sintering of spherical borosilicate glass powder (particle size 5 to 10 μm) under a uniaxial stress was studied at 800°C. The experiments allowed the measurement of the kinetics of densification and creep, the viscosities for creep and bulk deformation, and the sintering stress which was found to increase with density. The data show excellent qualitative agreement with Scherer's theory of viscous sintering. In addition, the quantitative comparison between theory and experiment shows good agreement; the measured viscosity of the bulk glass was ∽1×109 P (∽1×108 Pa·s) compared to ∽3×109 P (∽3 Pa·s) obtained by fitting the data with Scherer's theory. 相似文献
13.
14.
15.
16.
Summary: Polymeric thermosetting composites can be used as metal substitutes for certain applications if they possess high temperature stability in air, low coefficient of thermal expansion (CTE), and sufficient flexural strength, in combination with competitive costs. Commercial bismaleimide, bisnadimide, and cyanate ester thermosetting materials were selected due to their excellent thermal stability. Low CTEs were achieved by adding high loading levels of fused silica or silicon nitride fillers. Several optimized composites were fabricated by varying the materials, composition, and cure conditions. Characteristic composite properties, such as CTE, thermal stability, glass transition temperature (Tg), flexural strength, and filler distribution were investigated. The best system developed consists of Matrimide 5292, a commercial two‐component bismaleimide resin, filled with 75% Silbond FW100EST, and additionally reinforced with 0.5% Twaron short fibers. This composite is distinguished by a CTE around 15 ppm · K−1, a Tg around 340 °C, flexural strength above 100 MPa, and attractive material costs.
17.
B2O3-BaO-ZnO系统玻璃的形成规律及组成与性能之间的关系研究 总被引:6,自引:1,他引:5
用传统熔体冷却方法制得B2O3-BaO-ZnO三元系统玻璃,考察了该系统玻璃的形成规律,并且探索了该系统玻璃的组成与性能之间的关系.结果表明:该系统玻璃的形成范围较宽,但B2O3的引入摩尔分数最高不能超过75%,最低不能少于25%.B2O3的含量过高,熔体冷却时容易分相,而B2O3的含量过低时,则熔体在冷却时容易结晶.获得玻璃的线胀系数在(6~10)×10-6K-1之间;转变温度在530~580℃之间;室温下电阻率在(2~5)×1010Ω·m之间;密度值较大. 相似文献
18.
A pointwise mathematical model of sintering of a compact of an ultrafine metal powder in the thermal explosion mode is developed. A condition for occurrence of this reaction mode is found. The model is verified by results on the delay and temperature of the beginning of Ptblack powder sintering. 相似文献
19.
作为绿色环保材料,无铅低熔点玻璃已经在电子元器件的封装和涂层等领域得到了广泛应用。以P2O5-ZnO-B2O3体系为基础玻璃,通过外加法研究氧化物添加剂(Fe2O3、MnO2、CuO、CeO2和Y2O3)对玻璃密度(ρ)、热膨胀系数(α)、特征温度(Tg和Td)及化学稳定性的影响。实验结果表明:使用适量的添加剂可以增大玻璃密度;除Y2O3外,其它添加剂提高玻璃的热膨胀系数;MnO2、CuO和Y2O3显著降低玻璃的特征温度,但Fe2O3和CeO2的影响较小;加入适量添加剂能显著改善玻璃的化学稳定性,其中加Y2O3的耐酸性最好,加CeO2的耐碱性最好。 相似文献
20.
Cordierite ceramics were prepared by using talc, bauxite and kaolin clay as starting materials. According to the detected resuh of XRD step-scanning from 25° to 35° by a high temperature X-ray diffractometer, 20 and d values of five peaks of cordierite crystal were ascer- rained. Then the least squares technique was used to cal- culate the crystal parameters : at 25 ℃ , a = b = O. 981 8 nm, c =0. 927 4 nm, V=O. 774 3 nm3 ; at 600 ℃ , a =b =O. 982 0 nm, c=0.9252 nm, V=O. 773 5 nm3. The crystal volumetric coefficient of thermal expansion (CTE) and linear CTE along a and c axes were calcu- lated, αv = 2. 33 × 10-6℃-1, αa = αb, = 3. 27 × 10-6℃ -1 , αc = -4.19 ×10-6℃ -1. The average CTE of cordierite crystal is as low as O. 78 × 10-6℃ -1 相似文献