CAJ | 학술논문

为了研究物料在微波干燥过程中的动态吸波效率，文中将反射损耗理论引入其中，计算了2．45 GHz微波频率下，20℃时含水率为1％-5％以及含水率为4％的氯化钠在20-100℃的反射损耗系数。计算结果显示，厚度为0．014 m含水率4％的氯化钠在60℃取得最大的微波吸收效率，达到-68 dB；不同含水率的氯化钠反射损耗系数随着厚度的增加，会按照含水率由高到低的顺序依次出现吸波峰。研究结果表明，只有在对应小于1/8波长的吸收峰偏移的较小厚度下，氯化钠才能在整个微波干燥过程中一直取得较高的吸波效率。
위료연구물료재미파간조과정중적동태흡파효솔，문중장반사손모이론인입기중，계산료2．45 GHz미파빈솔하，20℃시함수솔위1％-5％이급함수솔위4％적록화납재20-100℃적반사손모계수。계산결과현시，후도위0．014 m함수솔4％적록화납재60℃취득최대적미파흡수효솔，체도-68 dB；불동함수솔적록화납반사손모계수수착후도적증가，회안조함수솔유고도저적순서의차출현흡파봉。연구결과표명，지유재대응소우1/8파장적흡수봉편이적교소후도하，록화납재능재정개미파간조과정중일직취득교고적흡파효솔。
The concept of reflection loss was introduced to study the dynamic absorption efficiency of materials.The microwave reflection loss (RL)of sodium chloride was calculated in the moisture content ranged from 1%to 5%at 20 ℃ and sodium chloride (moisture content 4%)at 20-100 ℃ and 2.45 GHz.The calculated reflection losses show that the maximum microwave absorption with RL of -68 dB can be obtained for sodium chloride (moisture content 4%)with a thickness of 0.014 m at 60 ℃.With increasing thickness,the RL of sodium chloride appears microwave absorption peak following the order of the moisture content from high to low in turn.The results demonstrate that higher microwave absorption throughout the heating process can only be achieved in sodium chloride with a small thickness in which a slight absorption peak shift (less than one-eighth wavelength in sodium chloride)occurs.