氯钌酸铵的微波介电特性及温升行为

Microwave dielectric properties and temperature increasing behavior of ammonium hexachlororuthenate

为了研究微波煅烧氯钌酸铵制备高纯钌粉的可行性,采用谐振腔微扰法研究了氯钌酸铵—钌粉混合物料的微波介电特性和温升行为。结果表明,氯钌酸铵—钌粉混合物料的微波介电特性与物料的表观密度呈正比;在25~300℃时,混合物料的微波介电特性随温度的升高缓慢增加,而在300~450℃时,混合物料的微波介电特性随温度的升高急剧增大;添加5%钌粉混合物料的吸波性能明显强于氯钌酸铵的;微波场中,氯钌酸铵升温较慢,而氯钌酸铵—钌粉混合物料升温迅速,其升温速率随微波功率和物料量的增大而增大。

In order to study the feasibility of preparing high purity ruthenium powder by microwave calcination of ammonium hexachlororuthenate,the microwave dielectric properties and temperature rise behavior of the mixture of ammonium hexachlororuthenate and ruthenium powder were studied by resonant cavity perturbation method.The results show that the microwave dielectric properties of ammonium hexachlororuthenate and ruthenium powder mixture are proportional to the apparent density.At 25-300℃,the microwave dielectric properties of the mixed materials change slowly with the increase of temperature,while at 300—450℃,the dielectric properties of the mixture increase sharply with the increase of temperature.The wave absorption performance of the mixed material with 5%ruthenium powder is obviously better than that of ammonium hexachlororuthenate.In the microwave field,the temperature of ammonium hexachlororuthenate rises slowly,while the temperature of ammonium hexachlororuthenate and ruthenium mixture powder rises rapidly,the heating rate increases with the increase of microwave power and material amount.