硅碳棒

硅碳棒的电气性能
硅碳棒具有较大的比电阻，在空气中通电加热，发热部表面温度1050±50℃时，电阻率为600-1400Ω-mm2/M.硅碳棒的电阻随温度升高而变化，从室温到800℃。电阻-温度特征曲线为负值，温度高于800℃为正值。

硅碳棒表面负荷
硅碳棒表面负荷=额定功率/发热部表面积（W/cm2）
硅碳棒表面负荷大小与其使用寿命长短关系很大，因此，在通电加热时要严格控制在允许负荷范围之内，切忌超负荷使用。
硅碳棒发热部表面温度与相应炉温下，发热部单位表面允许负荷如上表。
气氛对硅碳棒的影响
炉内气氛对硅碳棒电热元件的使用寿命有重要影响，硅碳棒在使用过程中逐步氧化产生SiO2，分隔SiC结晶颗粒，局部电阻增大、体积膨胀，直至最后断裂。
硅碳棒电热元件在干燥洁净空气中连续使用（1450℃）寿命可达2000小时。
气  氛元件最高使用温度（℃）
空  气1600
真  空1000-1200
氮  气1350
氢  气1200
烃  气1250
硅碳棒参考数据
直径(mm)长度 (mm)发热区表面积(cm2)标准负荷(at 1050℃)
Hot endCold endtotal电压 V功率W电阻Ω
1215015045056418961.85
200200600755012002.10
250200650946315042.62
3002007001137518083.15
14200200600884114081.22
2502507501105117601.50
3002508001326221121.80
3502007501547324642.14
4002509001768228162.40
163002508001506224001.60
35035010501767028161.75
40035011002008032002.00
4502509502259036002.25
500250100025010040002.50
600250110030012048003.00
2030040011001885930081.14
40035011002517640161.45
50040013003149750561.85
600400140037611460162.15
700400150043913870242.7
800300140050214875302.9
900300150056516284753.1
253003009002365337760.75
40045013003147150244
50040013003929062721.3
600400140047010875201.55
700400150055012082501.75
800400160062713494051.9
9003001500705151105752.16
10003001600785168117752.4
3040030010003806357000.7
50030011004708070500.9
60040014005709285501
700450160066010999001.2
8005001800750125112501.4
9004001700850140127501.53
10003001600940153141001.65
110030017001035168155251.82
3540040012004406766000.68
50040013005508482500.85
600400140066010099001.02
7004001500770117115501.19
8004001600880134132001.36
9004001700990151148501.53
100040018001100167165001.69
110040019001210184181501.87
120040030001320201198002.04
130040021001430218214502.21
140040022001540234231002.38
150040023001650251247502.55
160030022001760263255202.72
170030023001870280271152.89
4050040013006287594200.6
600400140075390112950.72
7004001500880105132000.84
80040016001005118145730.96
90040017001130133163851.08
100040018001255148181981.2
110040019001381163200251.32
120040020001506177218371.44
130040021001630192236351.56
140040022001760207255201.68
150040023001880222272601.8
160030022002010236291451.91
170030023002140250310302.02
45508280106770861106250.36
559394134678068116900.4
610305121985174127600.43
660293124592181138050.47
711394149999287149700.51
7623941549106393159350.55
8133941600113499170000.59
86439416511205104180700.61
91439417021275112191150.65
96539417531346118201800.7
99141918291382120207250.69
101639418031417122212500.7
111841919561560136233800.8
121943220831700148254900.87
127039420571772155265600.92
129538120571806155270820.89
132139421081843161276250.95
137239421591914168286901
142239422101984173297401.03
147339422612055180308051.07
152439423112126186318701.1
157541924132197192329401.15
162639424132268197340051.17
167642025152338205350501.24
182928023882551218382501.24
243742032773401291509851.66