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Amorphous kaolinite derivatives were prepared through mixing kaolinite with HCOOK and KOH solution. Ki-netics of kaolinite being turned into amorphous derivatvies was investigated by XRD. It showed that the transfor-mation included dynamic and diffuse controlling stages. And the active energy E1=26.8kJ·mol-1; E2=12.2 kJ·mol-1. TEM and SEM images showed that particle size of the amorphous derivatives was about 50nm. And the amorphous derivatives seemed like alumnsilicate gel, accompanied by some aggregates. 相似文献
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采用熔体冷却法制备了xTeO2-(98-x) PbO-2Bi2O3(x=40mol;、45mol;、50mol;、55mol;、60mol;)玻璃试样,利用红外和拉曼光谱对玻璃结构随TeO2含量的变化进行了分析,同时研究了TeO2含量对玻璃软化温度(Tf)、热膨胀系数(α)及化学稳定性(DR)的影响;将以上玻璃粉与银粉以及有机载体按一定比例配制成银浆,在硅基片正面经丝网印刷和快速烧结制得正面电极,研究了玻璃粉对硅基片表面所镀减反膜的腐蚀效果以及正面电极附着力(T)和电阻率(p)的影响.结果表明:随着TeO2含量的增加,玻璃主要结构单元逐渐由[TeO3]三角锥和[PbO4]四方锥体转变为[TeO4]三角双锥,当x=55mol;时,主要结构单元为[TeO3]三角锥和[TeO4]三角双锥,此时碲酸盐玻璃的综合性能良好:r =540℃,α=16×10-6/℃,DR=6.5605×10-8 g·cm-2·min-1玻璃粉对减反膜的腐蚀作用较明显,正面电极与硅基片附着力较大,电阻率较低,T=4.4 N,ρ=2.617μΩ·cm. 相似文献
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