经久耐用石墨坩埚尺寸表单位：毫米规格上口外径外型高度1＃70782＃871083＃1021204＃1121315＃1211416＃1211548＃13716910＃14818612＃15619216＃16421220＃18323225＃19625030＃20826940＃23929250＃25731460＃27032770＃28036080＃296336100＃321379120＃345388150＃362429200＃395483250＃430557300＃455610400＃526661500＃531713600＃580600750＃600650800＃6107301000＃6208001500＃7208002500＃8751000坩埚理化指标标准参数测试数据耐火度≥1680℃耐火度≥1685℃碳含量≥38%碳含量≥41.46%显气孔率≤35%显气孔率≤32%体积密度≥1.6g/cm3体积密度≥1.71g/cm3)