查詢結果分析
來源資料
頁籤選單縮合
題 名 | 低熔磷酸鉛銅玻璃之熔製與性質研究=The Preparation and Properties of Low-melting Lead-Copper-Phosphate Glasses |
---|---|
作 者 | 施並裕; | 書刊名 | 聯合學報 |
卷 期 | 16 1999.01[民88.01] |
頁 次 | 頁151-158 |
分類號 | 440.33 |
關鍵詞 | 磷酸鉛銅玻璃; 玻璃轉移溫度; 化學耐久性; Lead-copper-phosphate glasses; Glass transition temperature; XPS; Chemical durability; |
語 文 | 中文(Chinese) |
中文摘要 | 三成份系低熔磷酸鉛銅[60P�烙��-(40-x)PbO-xCuO]玻璃已成功製得。本系玻璃之 玻璃轉移溫度( Tg )在 320 ℃以下; 在 30 ℃去離子水中之溶解速率可降至 9.5 × 10 ���� g/cm �插D min。 其中 60P �� O �� - 20PbO-20CuO 玻璃的 Tg 最低,化學耐久性最 佳。本系玻璃之 Tg、密度和莫耳體積隨著 CuO 含量之增加(≦ 20mol% )而降低,同時化 學耐久性亦獲得改善。當 CuO 含量為 20mol% 時,玻璃之 Tg、莫耳體積和溶解速率均達最 低值。 由 O 1s XPS 分析之結果,證實 P-O-Cu 與 P-O-Pb 鍵聯之存在。當適量 CuO (≦ 20mol% )取代 PbO 時,將促使 Pb 進入玻璃網絡中,並產生更多 P-O-Cu 及 P-O-Pb 鍵聯 ,以取代原本之 P-O 和 P=O,但對 P-O-P 鍵不產生影響。因此,提高了玻璃網架之交聯程 度,而使化學耐久性獲得改善。當 CuO 含量為 20 mol% 時,玻璃結構中非對稱性架橋氧之 含量最高,而非架橋氧之含量最低。 CuO 和 PbO 在本玻璃物系中,係扮演著玻璃網絡形成 劑及修飾劑雙重角色。 |
英文摘要 | Ternary lead-copper-phosphate [60P�烙��-(40-x)PbO-xCuO] glasses were prepared. This glass system has glass transition temperature (Tg) below 320 ℃, and the dissolution rate in 30 ℃ deionized water can be lowered to about 9.5 × 10 ���� g/cm ��.min. The glass with composition of 60P �� O �� -20PbO-20CuO has lowest Tg and best chemical durability in the studied glass system. The density, molar volume, and Tg decrease, and chemical durability increases with the increasing CuO content (≦ 20 mol%). Tg, molar volume, and dissolution rate reach a minimum as the glass with 20 mol% CuO. The analyses of O ls XPS indicate the formation of P-O-Cu and P-O-Pb linkages in the glass network. An appreciable amount of CuO (≦ 20 mol%) prompts more Pb into the glass network, and leading to increase the fraction of P-O-Cu and P-O-Pb linkages which will replace P-O and P=O bonds, while the fraction of P-O-P remains unchanged. Thus, the chemical durability improved due to increasing the crosslinking density of the glasses. The fraction of asymmetric bridging oxygen reaches a maximum in the glass with 20 mol% CuO. Both CuO and PbO play dual structural roles, as a network former and a network modifier in the studied lead-copper-phosphate glasses. |
本系統中英文摘要資訊取自各篇刊載內容。