简介：SpecimensofPbTesinglefilmaredepositedonGesubstratesbyvacuumthermalevaporation.Duringthetemperaturerangeof80–300K,thetransmittanceofaPbTefilmwithin2–15μmismeasuredevery20KbythePerkinElmerFouriertransforminfraredspectroscopycryogenictestingsystem.Then,therelationshipbetweentherefractiveindexandwavelengthwithin7–12μmatdifferenttemperaturesisreceivedbythefullspectruminversionmethodfitting.ItcanbeseenthattherelationshipconformstotheCauchyformula,whichcanbefitted.Then,therelationshipbetweentherefractiveindexofthePbTefilmandthetemperature/wavelengthcanbeexpressedasn(λ,T)=5.82840-0.00304T+4.61458×10~(-6)T~2+8.00280∕λ~2+0.21544∕λ~4,whichisobtainedbythefittingmethodbasedontheCauchyformula.Finally,thedesignedvalueobtainedbytheformulaandthemeasuredspectrumarecomparedtoverifytheaccuracyoftheformula.

简介：Thereisawidespreadinterestinleadtelluride(PbTe)asagoodthermoelectricmaterial.WereportthetemperaturedependenceofthermopowerS(T)andresistanceR(T)forPbTeatthedifferentpressuresoffrom1.8GPato5GPaobtainedbyusingthecubicanvilhighpressureapparatus.Withincreasingpressure,R(T)andS(T)decrease.TheeffectofpressureonR(T)islargerthanthatonS(T).Thepowerfactorthatisdeterminedbythermopowerandresistivityincreaseswithincreasingpressure.Thismethodisanefficienttoolforsynthesizinggoodthermoelectricmaterialsathighpressureandhightemperature.

简介：采用真空蒸发法制备相同厚度的PbTe薄膜，再利用RF磁控溅射法在上面制备不同厚度的Ag反射膜，采用XRD、SEM、FTIR和四探针法分别对制备样品的物相组成、表面形貌、透射率和电阻率进行测试，结果显示，所制备的薄膜具有明显的〈100〉方向择优取向，呈多晶结构，随着反射膜厚度的增加，薄膜结晶性能先降低后增加；晶粒尺寸增加，表面粗糙程度先降低后增加；薄膜光学性能在一定膜厚范围内，随着反射膜厚度的增加透射率降低，超过一定膜厚时，透射率降为零；随着反射膜厚度的增加，电阻率呈先急剧降低后缓慢降低的趋势。