Borate bonding porcelain and preparation method thereof

The invention relates to borate bonding porcelain for improving bonding strength of titanium-porcelain, in order to effectively improve titanium-porcelain bonding strength. The porcelain comprises the following components in percentages by mol: 50-81% of B2O3, 5-25% of La2O3, 0-25% of SrO, 0-25% of CaO, 0-10% of Na2O, 0-5% of K2O, 0-5% of Li2O, 0-10% of ZrO2, 0-10% of SnO2, and 0-25% of Al2O3. The sum of SrO and CaO is 5-25%. The borate bonding porcelain has the advantages of high titanium-porcelain bonding strength, and high chemical stability, and the thermal expansion coefficient is matched with titanium. At the same time, the borate bonding porcelain has low melting point and good mechanical performance. After sintering, the thermal expansion coefficient is 8.6-9.4x10 DEG C, and titanium-porcelain bonding strength is 36-52MPa. 本发明涉及种用于提高钛-瓷结合强度的硼酸盐粘结瓷，其可有效提高钛-瓷结合强度，以摩尔百分比计包括：50～81％BO、5～25％LaO、0～25％SrO、0～25％CaO、0～10％NaO、0～5％KO、0～5％LiO、0～10％ZrO、0～10％SnO、0～25％AlO。其中，SrO和CaO之和为5～25％。本发明的硼酸盐粘结瓷钛-瓷结合强度高