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PROBLEM TO BE SOLVED: To provide a carbon electrode for quartz glass melting, capable of suppressing the occurrence of foam in quartz glass (a transparent layer), suppressing the cutting off of arc discharge during the arc discharge and forming uniform quartz glass.SOLUTION: A carbon electrode 1 for quartz glass melting includes an electrode base material having a bulk density of 1.72-1.75 g/cmand carbon having a specific resistance of 7-8 μΩm and is suitably used, for example, when a quartz glass crucible 11 is manufactured. The carbon electrode 1 (an electrode base material) is carbon formed by a general manufacturing method using carbon particles being a mixture obtained by carbonizing a raw material of coke, etc., for example, a binder, such as coal based pitch coke and coal tar pitch.SELECTED DRAWING: Figure 2
【課題】石英ガラス（透明層）内の泡の発生を抑制できると共に、アーク放電中のアーク放電切れを抑制でき、均一な石英ガラスを形成できる石英ガラス溶融用カーボン電極の提供。【解決手段】電極基材がかさ密度１．７２〜１．７５ｇ／ｃｍ３で、かつ固有抵抗が７〜８μΩｍのカーボンから構成されている石英ガラス溶融用カーボン電極１。例えば石英ガラスルツボ１１を製造する際、好適に用いられる石英ガラス溶融用カーボン電極１。カーボン電極１（電極基材）はカーボン粒子がコークス等の原料、例えば石炭系ピッチコークスとコールタールピッ等の結合材等の炭化した混練物を用いて、一般的製造方法で形成するカーボンである。【選択図】図２
PROBLEM TO BE SOLVED: To provide a carbon electrode for quartz glass melting, capable of suppressing the occurrence of foam in quartz glass (a transparent layer), suppressing the cutting off of arc discharge during the arc discharge and forming uniform quartz glass.SOLUTION: A carbon electrode 1 for quartz glass melting includes an electrode base material having a bulk density of 1.72-1.75 g/cmand carbon having a specific resistance of 7-8 μΩm and is suitably used, for example, when a quartz glass crucible 11 is manufactured. The carbon electrode 1 (an electrode base material) is carbon formed by a general manufacturing method using carbon particles being a mixture obtained by carbonizing a raw material of coke, etc., for example, a binder, such as coal based pitch coke and coal tar pitch.SELECTED DRAWING: Figure 2
【課題】石英ガラス（透明層）内の泡の発生を抑制できると共に、アーク放電中のアーク放電切れを抑制でき、均一な石英ガラスを形成できる石英ガラス溶融用カーボン電極の提供。【解決手段】電極基材がかさ密度１．７２〜１．７５ｇ／ｃｍ３で、かつ固有抵抗が７〜８μΩｍのカーボンから構成されている石英ガラス溶融用カーボン電極１。例えば石英ガラスルツボ１１を製造する際、好適に用いられる石英ガラス溶融用カーボン電極１。カーボン電極１（電極基材）はカーボン粒子がコークス等の原料、例えば石炭系ピッチコークスとコールタールピッ等の結合材等の炭化した混練物を用いて、一般的製造方法で形成するカーボンである。【選択図】図２
CARBON ELECTRODE FOR QUARTZ GLASS MELTING
石英ガラス溶融用カーボン電極
KUDO MIKU (author)
2017-04-06
Patent
Electronic Resource
Japanese
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