No-lead RE doped sealing glass powder with low smelting point and its production process

A rare earth element and sealing glass technology, applied in the field of P2O5-SnO-ZnO lead-free low-melting glass powder, can solve the problems of difficult preparation, high sealing temperature of sealing glass powder, poor chemical stability, etc., and reduce expansion Coefficient, increase production efficiency, improve the effect of chemical stability

Active Publication Date: 2007-11-07
CHINA BUILDING MATERIALS ACAD
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Problems solved by technology

[0009] In order to solve the problems of high sealing temperature, poor chemical stability, and difficulty in preparation in the prior art, the object of the present invention is to provide a low sealing temperature, good chemical stability, and easy to prepare rare earth element-doped Oxide P 2 o 5 -SnO-ZnO lead-free low-melting sealing glass powder

Method used

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  • No-lead RE doped sealing glass powder with low smelting point and its production process

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Embodiment 1

[0034] Step 1: calculate according to the composition of example 1 in table 1 and take by weighing raw material compound (gram), P 2 o 5 38.5, SnO 70.0, ZnO 8.5, MgO 10.0, B 2 o 3 25.0, Al 2 o 3 5.0, Sb 2 o 3 20.0, Li 2 O 12.0, Na 2 O 15.0, K 2 O 10.0, CaO 8.0, SrO 6.0, BaO 16.0, Fe 2 o 3 8.0, WO 3 5.0, La 2 o 3 1.0, Y 2 o 3 , 8.0, Nd 2 o 3 6.0.

[0035] Step 2: Mix the above-mentioned weighed raw materials evenly, dry them at 280°C, grind and pulverize (about 200 mesh) after treatment, and mix 0.3 g of carbon powder as a reducing agent (0.1 g of the total amount of raw materials in step 1 can be selected. ~0.3wt%), melted at 1100°C for 2 hours, cooled on an iron plate, then crushed, ground, and sieved (200 mesh to 220 mesh) to form glass powder.

[0036] Step 3: using three types or four types of quartz glass prefabricated rods to prepare quartz glass powder fillers, grinding, pulverizing, and sieving (200 mesh to 220 mesh) to obtain fillers.

[003...

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Abstract

The present invention discloses one kind of no-lead RE doped sealing glass powder with low smelting point for vacuum glass sealing and its preparation process. The no-lead sealing glass powder has P2O5, SnO and ZnO as basic glass oxides and mixed RE oxide of La, Yt and Nd added, with the weight ratio between the basic glass oxides and the mixed RE oxide being (30.0-381.5) to (0.12-19.0). The no-lead sealing glass powder of the present invention with doping mixed RE oxide has lowered glass smelting and sealing temperature, raised chemical stability and lowered thermal expansion coefficient of glass as well as lowered environmental pollution. It is used in sealing electronic device and element and vacuum glass.

Description

technical field [0001] The invention belongs to the technical field of glass production. Specifically relates to a kind of glass powder, specifically a kind of P doped with rare earth elements and applied to vacuum glass sealing 2 o 5 - SnO-ZnO lead-free low-melting glass powder and a method for producing the glass powder. Background technique [0002] Glass powder with low melting point and low expansion coefficient is the sealing material usually used in the production process of vacuum glass products. [0003] At present, most of the materials selected for vacuum glass sealing are lead-containing sealing glass, such as PbO-B 2 o 3 -SiO 2 system or PbO-ZnO-B 2 o 3 Department of glass. The softening temperature of these glasses is less than 400°C, and the coefficient of thermal expansion is 90-100×10 -7 / °C, a good sealing material (particle size 10-40 μm) can flow for a long time during the sealing process without complete crystallization. But the lead oxide cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C8/24
CPCC03C3/247C03C3/16C03C3/17C03C3/19C03C3/21C03C8/00C03C12/00
Inventor 黄幼榕李长久崔竹高锡平
Owner CHINA BUILDING MATERIALS ACAD
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