Roles of CaO, MgO and SiO2 on crystallization and microstructure development in diopside-based glass-ceramic glazes under industrial fast-firing condition

With vanadium tailings and lead-zinc tailings as the main raw materials, gold tailings, waste glass powder, other fluxes and SiC foaming agents are added to prepare foamed ceramics. The effects of Ca and Mg in the fluxes of calcite, talc, and dolomite on the appearance, pore size, porosity, bulk density, and compressive strength of the samples were investigated and the mechanisms of the effects were analyzed. The XRD results showed that the sample consisted primarily of quartz, albite, augite, and a small amount of corundum. Calcite favors the formation of the augite phase, talc favors the formation of the albite phase, and dolomite combines the advantages of both. The formation of albite reduces the viscosity of the melt, and the formation of augite greatly enhances the strength of foamed ceramics. It has been shown that by adding 8% dolomite, a foaming ceramic with a bulk density of .561 g/cm 3 , a porosity of 62.77% and a compressive strength of 10.823 MPa can be prepared, resulting in a low-cost, lightweight and high strength foamed ceramic partition.

Section: Resultsmentioning

confidence: 99%

Section: Effect Of Dolomite Addition On Structure and Properties Of F...mentioning

confidence: 99%

Effect of Ca and Mg on the properties of foamed ceramics prepared with multisolid waste

Cheng

Duan

Liu

et al. 2023

“…1,3 However, unlike a pure glass phase, many glazes contain both glass phase and crystals, and even crystal accounts for more than 20%. 4,5 Therefore, the influence of crystal should be taken into consideration when studying the corrosion resistance of a glaze. 6,7 In addition to the corrosion resistance, the cleanability of glaze also receives increasing attention to protect the environment and save water.…”

Section: Introductionmentioning

confidence: 99%

“…When the glaze is in contact with an alkaline solution, the OH ‐ breaks the Si–O–Si bond, making the dissolution of the network 1,3 . However, unlike a pure glass phase, many glazes contain both glass phase and crystals, and even crystal accounts for more than 20% 4,5 . Therefore, the influence of crystal should be taken into consideration when studying the corrosion resistance of a glaze 6,7 …”

Section: Introductionmentioning

confidence: 99%

Corrosion resistance and cleanability of glazed surface

Wang

et al. 2020

This work aimed to study the effect of surface properties on the corrosion resistance and cleanability of glazed surface. The samples were zircon‐containing raw glaze, zirconium‐based frit glaze, double‐glazed transparent glaze, and raw glaze coated with TiO2 film. The corrosion resistance of the samples in acidic, alkaline, and household detergent solutions was investigated by the changes in contact angle and surface roughness. Besides, the cleanability of the samples before and after corrosion was also compared. It was found that the corrosion resistance of a glaze was affected by the presence of crystals and their distribution, while the corrosion resistance of TiO2 film was closely related to itself and the nature of the substrate. The cleaning test showed that although adding a layer of transparent glaze reduced the surface roughness, it did not improve the cleanability. The TiO2 film had excellent cleaning performance, especially after ultraviolet light irradiation, but it had weak alkali corrosion resistance. Therefore, a zirconium‐based frit glaze is the right choice for sanitary ware in terms of durability and easy cleaning.

“…The quality of crystalline matte glazes is superior to that of the other two glazes in that they have lower porosity and less pinholes, higher stain resistance, better cleaning tendency, and higher microhardness and wear resistance. Since crystallization is required, the glaze should not be overfired, and the proper cooling cycle must be carefully maintained …”

Section: Introductionmentioning

confidence: 99%

Replacing K‐feldspar with a siliceous solid by‐product of zeolite industry for medium‐temperature calcium matte glazes

Cheng

Chun-e

et al. 2019

To recycle a multicomponent siliceous solid waste (MSW), a by-product of the zeolite industry, as a K-feldspar substitute for the preparation of medium temperature calcium matte glazes, the chemical composition, phase evolution, and thermal behavior of the waste versus temperature were characterized using multiple techniques.Based on the TG-DTA results, the waste was thermal treated at an optimum temperature of 1200°C prior to glaze preparation. Then, the calcined MSW was substituted for various amounts of K-feldspar and calcium matte glazes were prepared that produced high-quality smooth surfaces with a velvety appearance after firing at 1200°C. The results indicate that the matting effects originate from the scattering of the incident light by densely populated columnar wollastonite crystals embedded in the glazes with the b-axis parallel to the glaze layer, which facilitates the wellresolved Raman peaks of the calcium matte glazes. K E Y W O R D Scalcium matte glazes, Raman spectroscopy, solid wastes, wollastonite