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Potassium sodium phosphate glass with high chemical stability and high dielectric constant

A phosphate glass, chemical stability technology, applied in the field of glass materials, can solve the problems that lead-containing materials do not meet environmental protection requirements and development trends, and achieve the effects of easy promotion and implementation of industrial production, convenient operation, and simple production process

Active Publication Date: 2015-12-30
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditionally, the use temperature of barium titanate dielectric materials does not exceed 125 degrees due to the limitation of phase transition temperature; while lead titanate materials have a high phase transition temperature (490 degrees), but lead-containing materials do not meet environmental protection requirements and development trends

Method used

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  • Potassium sodium phosphate glass with high chemical stability and high dielectric constant
  • Potassium sodium phosphate glass with high chemical stability and high dielectric constant
  • Potassium sodium phosphate glass with high chemical stability and high dielectric constant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0035] Fixed Na 2 O and K 2 The molar ratio of O is 1:1, and the molar percentage is 15%; Nb 2 o 5 The molar percentages are 20, 25, 30, 35, 40 in turn; the corresponding P 2 o 5 The molar percentages are 50, 45, 40, 35, and 30 in turn, and the performance test results are shown in Table 1.

[0036] Table 1 Example 1-5 glass performance test results

[0037]

[0038] It can be seen from Table 1 that niobium pentoxide gradually replaces P in the components 2 o 5 When the content is high, the weight loss in boiling water bath of the sample decreases, the chemical stability increases, and the high temperature dielectric constant also increases.

Embodiment 6-11

[0040] Fixed Nb2O5 molar percentage 20%, Na 2 O and K 2 O molar ratio is 1:1; Na 2 O+K 2 The total molar percentage of O takes 20, 26, 36, 40, 46, 50 in turn; the corresponding P 2 o 5 The molar percentages are 60, 54, 44, 40, 34, 30 in sequence, and the performance test results are shown in Table 2.

[0041] Table 2 Example 6-11 glass performance test results

[0042]

[0043] It can be seen from Table 2 that the fixed Nb 2 o 5 20mol%, Na 2 O / K 2 O ratio 1:1, with Na 2 O+K 2 O gradually replaces P in the components 2 o 5 content, the total amount of Na2O+K2O increases from 20 to 50mol%, and the dielectric constant first increases and then decreases; Na 2 O+K 2 The total amount of O is 20, the weight loss is the smallest, the chemical stability is the best, and Na 2 O+K 2 The total amount of O is 36mol%, the weight loss is the largest, and the chemical stability is the worst.

Embodiment 12-15

[0045] Fixed Nb 2 o 5 Mole percent 25%, Na 2 O and K 2 O molar ratio is 1:1; Na 2 O+K 2 The total molar percentage of O takes 20, 26, 36, 40 in turn; the corresponding P 2 o 5 The molar percentages are 55, 49, 39, and 35 in turn, and the performance test results are shown in Table 3.

[0046] Table 3 Example 6-11 glass performance test results

[0047]

[0048] It can be seen from Table 3 that the fixed Nb 2 o 5 25mol%, Na 2 O / K 2 O ratio 1:1, with Na 2 O+K 2 O gradually replaces P in the components 2 o 5 content, the dielectric constant increases; Na 2 O+K 2 When the total amount of O is 20mol%, the weight loss is the largest and the chemical stability is the worst. 2 O+K 2 When the total amount of O is 36 mol%, the weight loss is the smallest and the chemical stability is the best.

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Abstract

The invention provides potassium sodium phosphate glass with high chemical stability and a high dielectric constant. The potassium sodium phosphate glass is characterized by being prepared from the following ingredients in the mole percentage: 10 to 25 percent of Na2O, 10 to 25 percent of K2O, 20 to 40 percent of Nb2O5 and 30 to 50 percent of P2O5. The modification effect of niobium pentoxide on the glass network and the mixed alkali effect generated due to the simultaneous existence of K2O and Na2O are utilized for improving the chemical stability of the glass, and the potassium sodium niobate-containing glass with high dielectric property is provided; through heat treatment, potassium-sodium niobate, or potassium and sodium niobate phosphate crystals are separated out from test specimens, and the dielectric property is improved. The high-chemical-stability and practical phosphate glass provided by the invention has the advantages that ingredients are few; the proportion is reasonable; the production process is simple; the operation is convenient; the industrial production popularization and implementation are easy.

Description

technical field [0001] The invention belongs to the technical field of glass materials, and relates to a dielectric glass material with good chemical stability and high dielectric constant, in particular to potassium sodium phosphate glass with high chemical stability and high dielectric constant. Background technique [0002] Phosphate glass because of its structural unit [PO 4 ] There is a structural asymmetric center, and the general chemical stability is poor; but it has a low melting point and is easy to produce. K 2 O, Na 2 Alkali metal oxides such as O can also reduce the melting temperature of the glass, but also reduce the chemical stability of the glass. Theoretically, by K 2 O, Na 2 When mixed with O at the same time, the mixed alkali effect can improve the chemical stability of the glass. In addition, to make sodium potassium phosphate glass practical, appropriate oxides can also be added to the phosphate system to improve its chemical stability. Such as t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/16
Inventor 刘世权爱特菲
Owner UNIV OF JINAN