なぜEガラスは900℃で機能しないのか？

<span style='box-sizing: border-box; margin: 0px; padding: 0px; color-scheme: light; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; color: rgb(0, 0, 0); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; font-size: 14px; text-align: left; background-color: rgb(255, 255, 255); float: none; display: inline !important;'>なぜEガラスは900°Cでは機能しないのでしょうか？ <br style='box-sizing: border-box; margin: 0px; padding: 0px; color-scheme: light; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; color: rgb(0, 0, 0); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; font-size: 14px; text-align: left; background-color: rgb(255, 255, 255);'><span style='box-sizing: border-box; margin: 0px; padding: 0px; color-scheme: light; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; color: rgb(0, 0, 0); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; font-size: 14px; text-align: left; background-color: rgb(255, 255, 255); float: none; display: inline !important;'>このガラス繊維は550°Cまでしか耐えられません。それ以上の温度になると、個々の繊維が互いに溶け合い、編み目が一つの塊のガラスになってしまいます。それでもガラスの中に編み目の構造がまだ確認できるのは、なかなか美しいものです。