Method for preparing borosilicate foam glass

A foam glass and borosilicate technology, applied in a field, can solve the problems of poor acid corrosion resistance, difficulty in obtaining closed-cell structure foam glass, poor uniformity of apparent bubbles in foam glass, etc.

Inactive Publication Date: 2009-09-16
BEIJING UNIV OF TECH
View PDF0 Cites 44 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the composition system of these glasses mainly belongs to the soda-lime glass system. For the foam glass used for heat preservation, it is expected that the bubble structure is a closed-cell structure, which reduces and reduces the water absorption rate of the foam glass and improves the thermal insulation performance of the foam glass. However, this type of foam glass Common defects: First, the acid corrosion resistance is poor. Under the condition of 40% sulfuric acid c

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing borosilicate foam glass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The present invention is described based on the embodiments, and Table 1 is the composition and performance of the embodiments of the present invention and comparative examples.

[0048] . First, select raw materials according to the composition of borosilicate glass in Example 1 in Table 1, so that the ingredients meet the chemical composition of borosilicate glass in Example 1, and then use a 1L platinum crucible to melt at 1520° C. for 24 hours. After melting, a small amount of it was shaped into a bulk glass material and then annealed for expansion coefficient measurements. The rest are rolled into 0.3-1.5mm glass flakes. The borosilicate foam glass ingredient formula is: add 0.25g carbon black and 0.5g antimony oxide to every 100g borosilicate glass raw material. Grinding, the particle size reaches 325 mesh, put it into a heat-resistant steel mold, the foaming temperature is 940°C, and the foaming time is 45 minutes. After foaming, foam glass is formed. The foam g...

Embodiment 2

[0056] The composition of borosilicate foam glass is selected according to the composition of borosilicate glass in Example 2 of Table 1, so that the ingredients meet the chemical composition of borosilicate glass in Example 2, and the preparation process of the raw materials in Example 1 is adopted. The borosilicate foam glass ingredient formula is: add 0.25g carbon black and 0.5g antimony oxide to every 100g borosilicate glass raw material. Grinding, the particle size reaches 325 mesh, put it into a heat-resistant steel mold, the foaming temperature is 920°C, and the foaming time is 40 minutes. After foaming, foam glass is formed. The apparent density, bubble appearance uniformity, and Mass water absorption, acid weight loss, compressive strength, flexural strength and other properties. From the relevant performance parameters in Example 2 in Table 1, the thermal shock stability reaches 196.3°C, and the bubble uniformity is 100cm 2 There are 0 air bubbles exceeding the diam...

Embodiment 3

[0058] The composition of borosilicate foam glass is selected according to the composition of borosilicate glass in Example 3 in Table 1, so that the ingredients meet the chemical composition of borosilicate glass in Example 3, and the preparation process of the raw materials in Example 1 is adopted. The borosilicate foam glass ingredient formula is: add 0.25g silicon carbide and 0.5g antimony oxide to every 100g borosilicate glass raw material. Grinding, the particle size reaches 325 mesh, put it into a heat-resistant steel mold, the foaming temperature is 960 ° C, and the foaming time is 50 minutes. After foaming, foam glass is formed. The apparent density, bubble appearance uniformity, and Mass water absorption, acid weight loss, compressive strength, flexural strength and other properties. From the relevant performance parameters in Example 3 in Table 1, the thermal shock stability reaches 381.6°C, and the bubble uniformity is 100cm 2 There are 0 bubbles exceeding the dia...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Compressive strengthaaaaaaaaaa
Flexural strengthaaaaaaaaaa
Compressive strengthaaaaaaaaaa
Login to view more

Abstract

The invention relates to a method for preparing borosilicate foam glass, comprising the following steps: glass raw materials, foaming agent and blowing promoter are finely ground and evenly mixed to form batch mixture; the batch mixture is placed in a heat resistant mould; the batch mixture is prepared into multiaperture glass materials after the processes of preheating, sintering, frothing, annealing and the like; the method is characterized in that the chemical composition(wt%) of the glass materials is: SiO2: 55-78, B2O3: 0.5-25, Al2O3: 2-8, Li2O: 0.1-0.5, Na2O: 5-14, K2O: 0.5-6.5, MgO: 1-5, CaO: 3-8, BaO: 0-3, TiO2: 0.5-4, SO3: 0.02-0.45, Fe2O3: 0.2-1.0, MnO2: 0-2.5. the glass material belongs to the system of borosilicate glass and can be prepared into foam glass product featuring good acid fastness, good thermal shock stability, high mechanical strength, good scour resistance, low heat conducting coefficient and even aerated structure by adopting carbon blowing agents(carbon black, graphite, carborundum) and blowing promoter material.

Description

technical field [0001] The invention relates to a method for preparing borosilicate foam glass. The product adopts a borosilicate glass raw material and an appropriate amount of foaming agent and foaming aid to obtain foam glass with excellent performance under a suitable temperature system. The foam Glass has high chemical stability, especially acid resistance and good mechanical strength. It can be used as foam glass raw material to produce good acid resistance, good thermal shock stability, high mechanical strength, good erosion resistance, low thermal conductivity and uniform pore structure. foam glass products. Background technique [0002] Foam glass is made of quantitative glass raw materials, foaming agent and foaming aids, etc., which are finely pulverized and mixed uniformly to form batch materials, which are put into heat-resistant steel molds, and then preheated, sintered, foamed, and annealed. Made of porous glass material. Foam glass is composed of a large nu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C03C11/00
Inventor 田英良孙诗兵
Owner BEIJING UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap