Sealing glass powder, sealing glass ceramic powder and application

The invention provides sealing glass powder, which is prepared from glass containing 20 to 40 mol percent of SiO2, 10 to 30 mol percent of B2O3, 10 to 40 mol percent of BaO, 2 to 15 mol percent of MgO, 0.1 to 5 mol percent of La2O3, 2 to 10 mol percent of Y2O3, 1 to 5 mol percent of ZrO, 0 to 15 mol percent of SrO and 0 to 30 mol percent of CaO. The invention also provides a method for forming sealing glass by sintering the glass powder. In addition, the invention provides glass ceramic powder and the method for forming the sealing glass ceramic by sintering the powder. Furthermore, the invention provides the application of the sealing glass and the sealing glass ceramic. The glass powder and the glass ceramic powder in the invention are simple in adopted raw materials and manufacturing process, low in cost and good in wetting quality and compatibility with connected parts and have the advantages of adjustable thermal expansion coefficient and good thermal stability.