3. 2 Effect of temperature on the electrical conductivityIn the previous section, effect of the density of the bulk graphite on its electrical conductivity wasdiscussed. However, all of the results were carried out at room temperature. Here, effect of thetemperature of the sample on its electrical conductivity was investigated. The conductivities of thesamples of different temperatures, ranging from 298-573 K, were measured. Fig. 5(a) shows theconductivity of the bulk graphites obtained from non-sonicated graphites (CC). The dark-filled circles andthe hollow circles refer to the results from the non-sonicated graphites of 10 MPa compression (CC10MPa) and the non-sonicated graphites of 50 MPa compression (CC 50 MPa), respectively. The resultsshow that at all temperatures the electrical conductivity of the CC50MPa is much higher than that of theCC10MPa. For the CC50MPa, the conductivity of the sample 298 K was about 26 S⋅ m−1 and it was up to46 S⋅ m−1 for 573 K. Fig. 5(b) represents the conductivity of the bulk graphites obtained from sonicatedgraphites (SC). Similar to Fig. 5(a), the dark-filled circles and the hollow circles refer to the results fromthe non-sonicated graphites of 10 MPa compression (SC10 MPa) and the non-sonicated graphites of 50MPa compression (SC 50 MPa), respectively. The results were also similar to those of non-sonicatedgraphites (CC). Both compression pressure and temperature significantly affected the electricalconductivity of the samples. For example, the conductivity of the SC50MPa at 298 K was about 42 S⋅ m−1and it was raised up to 54 S⋅ m−1 for 573 K. Fig. 5(c) presents the results obtained from both Fig. 5(a) and(c). It is obvious that the electrical conductivity of the samples depends on compression pressure,
3. 2 Effect of temperature on the electrical conductivity<br>In the previous section, effect of the density of the bulk graphite on its electrical conductivity was<br>discussed. However, all of the results were carried out at room temperature. Here, effect of the<br>temperature of the sample on its electrical conductivity was investigated. The conductivities of the<br>samples of different temperatures, ranging from 298-573 K, were measured. Fig. 5(a) shows the<br>conductivity of the bulk graphites obtained from non-sonicated graphites (CC). The dark-filled circles and<br>the hollow circles refer to the results from the non-sonicated graphites of 10 MPa compression (CC10<br>MPa) and the non-sonicated graphites of 50 MPa compression (CC 50 MPa), respectively. The results<br>show that at all temperatures the electrical conductivity of the CC50MPa is much higher than that of the<br>CC10MPa. For the CC50MPa, the conductivity of the sample 298 K was about 26 S⋅ m−1<br> and it was up to<br>46 S⋅ m−1<br> for 573 K. Fig. 5(b) represents the conductivity of the bulk graphites obtained from sonicated<br>graphites (SC). Similar to Fig. 5(a), the dark-filled circles and the hollow circles refer to the results from<br>the non-sonicated graphites of 10 MPa compression (SC10 MPa) and the non-sonicated graphites of 50<br>MPa compression (SC 50 MPa), respectively. The results were also similar to those of non-sonicated<br>graphites (CC). Both compression pressure and temperature significantly affected the electrical<br>ตัวอย่างการนำ. สำหรับตัวอย่างเช่นที่ 298 การนำของ SC50MPa ได้เกี่ยวกับ K-42 เป็นS⋅ม. 1 <br>และมันเป็นS⋅ 54 จะเพิ่มขึ้นถึง. 1 ม. <br>สำหรับ 573 K. รูป .. 5 (C) ผลที่ได้รับของขวัญ รูปทั้งจาก .. 5 (A) และ<br>(C). มันเป็นสิ่งที่เห็นได้ชัดการนำไฟฟ้าของกลุ่มตัวอย่างขึ้นอยู่กับความดันการบีบอัด
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