Preparation method of high-density platinum-rhodium alloy ingot for TFT platinum channel

The invention relates to a preparation method of a high-density platinum-rhodium alloy ingot for a TFT platinum channel, and belongs to the technical field of metal materials. The platinum-rhodium alloy ingot with low porosity, no shrinkage porosity and high density is obtained by a smelting exhaust method of vacuuming, induction melting, deoxidizer adding, slowly solidifying, argon filling, vacuuming, induction melting and multiple cycles under the condition of only providing an ordinary mechanical pump. The preparation method effectively improves the density of a platinum-iridium product, thereby avoiding the uneven heating due to pores of the platinum-iridium product when the platinum-iridium product is electrified and heated. 本发明涉及种TFT铂金通道用高致密度铂铑合金铸锭制备方法，属于金属材料技术领域。其通过抽真空、感应熔化、加入脱氧剂、缓慢凝固、充氩气、抽真空、感应熔化并多次循环的熔炼排气方法，在仅具有普通机械泵的条件下得到低气孔率、无缩松、高致密度的铂铑合金铸锭。本发明有效提高了铂铑制品的致密度，从而避免了铂铑制品在通电加热时因气孔导致的加热不均。