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采用中和结晶-煅烧法制备Ta2O5粉末,分别考察了中和结晶过程中钽液浓度、钽液起始pH值、结晶温度、氨水浓度、氨水流速和搅拌速度等六个因素对Ta2O5粉末粒度的影响。试验结果表明,在钽液浓度c(Ta2O5)为95g/L,钽液起始pH=1.80,水浴温度60℃,氨水浓度8.0 mol/L,氨水流速1.0 mL/min,搅拌速度40 r/min的条件下,制得的Ta2O5粉末最大平均粒径可达1.80μm,完全满足生产需求。
The Ta2O5 powder was prepared by neutralization crystallization-calcination method. The effects of tantalum solution concentration, initial pH of tantalum solution, crystallization temperature, ammonia concentration, ammonia flow rate and stirring speed on the particle size of Ta2O5 influences. The experimental results showed that when the concentration of tantalum c (Ta2O5) was 95g / L, the initial pH of tantalum was 1.80, the temperature of water bath was 60 ℃, the concentration of ammonia water was 8.0 mol / L, the flow rate of ammonia water was 1.0 mL / min and the stirring rate was 40 r / min , The maximum average particle size of Ta2O5 powder can reach 1.80μm, which can fully meet the production requirements.