excessive heat treatment meaning in English

过度热处理

After the same heat treatment , the refractive index of various zrcfe content gel glass is also linear with the zroa content , but the excessive heat treatment temperatures ( > 150 ? ) have had no help to refractive index enhancement . by choosing different composition and heat treatment process , zrc > 2 - sio2 gel glasses with various refractive index can be prepared
随着热处理温度的提高，凝胶玻璃的折射率也随之增加，并且在相同的热处理温度条件下，对于不同组成的凝胶玻璃，其折射率仍随zro _ 2含量的增加线性增大，但过高的热处理温度(大于150 )对于折射率提高已无明显作用。