ALKALI-FREE GLASS

PROBLEM TO BE SOLVED: To provide an alkali-free glass that has high specific elasticity, high Young's modulus, high glass transition point, and low compaction, and facilitates float molding.SOLUTION: An alkali-free glass has Young's modulus of 90 GPa, compaction C1 of 5 ppm or less, and co...

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Bibliographic Details
Main Authors NOMURA SHUHEI, ONO KAZUTAKA, AKIYAMA JUN
Format Patent
LanguageEnglish
Japanese
Published 25.08.2016
Subjects
CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS
CHEMISTRY
GLASS
JOINING GLASS TO GLASS OR OTHER MATERIALS
METALLURGY
MINERAL OR SLAG WOOL
SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS
SURFACE TREATMENT OF GLASS
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Summary:PROBLEM TO BE SOLVED: To provide an alkali-free glass that has high specific elasticity, high Young's modulus, high glass transition point, and low compaction, and facilitates float molding.SOLUTION: An alkali-free glass has Young's modulus of 90 GPa, compaction C1 of 5 ppm or less, and compaction C2 of 50 ppm or less, and comprises, in mass% on an oxide basis, SiO40-65, AlOover 23.5-30, MgO 2.5-20, and CaO 2-30, where SiO+AlOof 70 or more and 90 or less.SELECTED DRAWING: None 【課題】高比弾性、かつ、高ヤング率であり、ガラス転移点が高く、コンパクションが低く、フロート成形が容易な無アルカリガラスの提供。【解決手段】ヤング率が９０ＧＰａであり、コンパクションＣ１が５ｐｐｍ以下であり、コンパクションＣ２が５０ｐｐｍ以下であり、酸化物基準の質量％表示で、ＳｉＯ2４０〜６５、Ａｌ2Ｏ3２３．５超〜３０、ＭｇＯ ２．５〜２０、ＣａＯ ２〜３０を含有し、ＳｉＯ2＋Ａｌ2Ｏ3が７０以上９０以下である無アルカリガラス。【選択図】なし
Bibliography:Application Number: JP20130134921