A Study On The Improving The Attrition Resistance Of The Gold-paste Layer Fused To Ni-Gr Alloy Through Blending Ultra-fine ZrO₂

[ObjectiveJ To explore the technology by which ZrO2 particles are diffused in alcohol and to improve the attrition resistance of the layer blending ultra-fine zircomoa power into the gold-paste.[Materials and Methods] The ZrO2 particles were observed by TEM after they had been constanly abraded for 4 hours by hand in alcohol and controlled the PH value at 5-5.5, 6-6.5, 7-7.5 and 8-8.5 and vibrated by ultrasound for 4 circles. The gold particles were observed by TEM after they had been diffused in alcohol Prepare the gold paste being mixed 1 to 5 percent of ultra-fine zircomoa power separately,then blush and fuse them to Ni-Gr alloy.Test the attrition resistance of the gold-paste layer with an attrition jet test apparatus after polishing. The values of attrition resistance were analysed by ANOVA.[results] The zircomoa power prepared under the condition of PH=8-8.5 well dispersed and the diameter of particles was 70nm to 200nm and in which the proportion of less than 100nm was only 30 percent. The diameter of gold particles was 0.025μm to 1.7μm. Most of gold particles was 0.2-0.3μm.The mixture of gold and zircomoa power was uniform and well dispersed. After blending 2-4% zircomoa power into the gold-paste, the attrition resistance rose obviously. The...