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    • 83. 发明公开
    • A GLASS -CERAMIC MATERIAL AND ITS PRODUCTION METHOD
    • GLAS-KERAMIK-MATERIAL UND VERFAHREN ZU SEINER HERSTELLUNG
    • EP2763940A1
    • 2014-08-13
    • EP12772475.5
    • 2012-08-27
    • Pinarci, Tamer
    • DOLEKCEKIC, Emrah
    • C03C1/00C03C10/12C03B32/02
    • C03B32/02C03B19/02C03B2201/00C03C1/00C03C3/097C03C10/0027C03C10/0054
    • This invention relates to a glass-ceramic material and its production method wherein glass ceramics having low expansion coefficient are produced ecologically and whereby said method comprises the steps of raw material batch preparation (101), melting (102), batch compensation to final composition (103), refining of the gas bubbles (104), shaping process (105) and ceramization (106). Preferably, the glass-ceramic comprises in wt %: 60-70 SiO2, 15-25 AI2O3, 0.5-5 B2O3, 3-8 Li2O, 0.5-2 Na2O, 0.1-0.8 K2O, 0.1-1.5 BaO, 0-0.5 CaO, 1-2.5 ZnO, 1-4 TiO2, 1-4 ZrO2, 0.1-2.5 P2O5, 0-0.5 MgO. The batch compensation step (103) consists in adding 0.5-5 wt % B2O3 and 0.1-2.5 wt % P2O5 during the melting process (102). Instead of oxide raw materials, carbonates (e.g. Li2CO3), nitrates (e.g. KNO3), or sulphates are used.
    • 本发明涉及玻璃陶瓷材料及其生产方法,其中生产具有低膨胀系数的玻璃陶瓷,其中所述方法包括以下步骤:原料分批制备(101),熔融(102),最终组合物的批量补偿 103),气泡(104)的精制,成型工艺(105)和陶瓷化(106)。 优选地,玻璃陶瓷包含重量%:60-70SiO 2,15-25Al 2 O 3,0.5-5B 2 O 3,3-8 Li 2 O,0.5-2 Na 2 O,0.1-0.8K 2 O,0.1-1.5 BaO,0-0.5 CaO ,1-2.5 ZnO,1-4TiO 2,1-4 ZrO 2,0.1-2.5P 2 O 5,0-0.5 MgO。 批量补偿步骤(103)包括在熔融过程(102)期间添加0.5-5重量%的B2O3和0.1-2.5重量%的P2O5。 代替氧化物原料,使用碳酸盐(例如Li 2 CO 3),硝酸盐(例如KNO 3)或硫酸盐。
    • 88. 发明公开
    • ALKALI FREE GLASS AND METHOD FOR PRODUCING ALKALI FREE GLASS
    • ALKALIFREIES GLAS U​​ND VERFAHREN ZUR HERSTELLUNG VON ALKALIFREIEM GLAS
    • EP2650262A1
    • 2013-10-16
    • EP11847758.7
    • 2011-12-02
    • Asahi Glass Company, Limited
    • TSUJIMURA TomoyukiNISHIZAWA ManabuKOIKE Akio
    • C03C3/087C03C1/00C03C3/091C03C3/093
    • C03C3/091C03C3/087
    • The present invention relates to an alkali-free glass having a strain point of 725°C or higher, an average thermal expansion coefficient at from 50 to 300°C of from 30×10 -7 to 40×10 -7 /°C, a temperature T 2 at which a glass viscosity is 10 2 dPa·s of 1,710°C or lower, and a temperature T 4 at which a glass viscosity is 10 4 dPa·s of 1,320°C or lower, the alkali-free glass including, in terms of mol% on the basis of oxides, SiO 2 : 66 to 70, Al 2 O 3 : 12 to 15, B 2 O 3 : 0 to 1.5, MgO: more than 9.5 and 13 or less, CaO: 4 to 9, SrO: 0.5 to 4.5, BaO: 0 to 1, and ZrO 2 : 0 to 2, in which MgO+CaO+SrO+BaO is from 17 to 21, MgO/(MgO+CaO+SrO+BaO) is 0.4 or more, MgO/(MgO+CaO) is 0.4 or more, MgO/(MgO+SrO) is 0.6 or more, and the alkali-free glass does not substantially contain an alkali metal oxide.
    • 本发明涉及应变点为725℃以上,50〜300℃的平均热膨胀系数为30×10 -7〜40×10 -7 /℃的无碱玻璃, 玻璃粘度为10 2 dPa·s为1710℃以下的温度T 2,玻璃粘度为10 4 dPa·s的温度T 4为1320℃以下,无碱玻璃 包括以氧化物为基准的摩尔%,SiO 2:66〜70,Al 2 O 3:12〜15,B 2 O 3:0〜1.5,MgO:9.5以上13以下,CaO: 4〜9,SrO:0.5〜4.5,BaO:0〜1,ZrO 2:0〜2,MgO + CaO + SrO + BaO为17〜21,MgO /(MgO + CaO + SrO + BaO) 为0.4以上,MgO /(MgO + CaO)为0.4以上,MgO /(MgO + SrO)为0.6以上,无碱玻璃基本不含有碱金属氧化物。