Low-temperature sanitary ceramic green body and preparation method therefor, and low-temperature sanitary ceramic

By introducing natural micro- and nano-fibrous tremolite into the low-temperature sanitary ceramic body material, the problems of easy cracking and narrow sintering range during the molding process are solved, realizing efficient molding and stable sintering of low-temperature sanitary ceramic bodies, and promoting energy conservation and emission reduction in the sanitary ceramic industry.

WO2026113228A1PCT designated stage Publication Date: 2026-06-04HUIDA SANITARY WARE
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
HUIDA SANITARY WARE
Filing Date
2025-04-14
Publication Date
2026-06-04

AI Technical Summary

Technical Problem

Existing low-temperature sanitary ceramic blanks are prone to cracking during the molding process, have poor suspension properties, and have a narrow sintering range, resulting in unstable product quality and making it difficult to achieve industrial application.

Method used

Natural micro/nano fibrous tremolite was introduced to replace dolomite as the calcium and magnesium source for the low-temperature synthesis of sodium/calcium feldspar. The low-temperature sintering system of SiO2-Al2O3-CaO-MgO-K2O-Na2O-Li2O-B2O3 was optimized. The molding performance and tensile strength were improved by the fluxing effect of tremolite, the sintering time was shortened and the sintering range was broadened.

Benefits of technology

It improves the tensile strength of wet and dry blanks, solves the cracking problem during the forming process, broadens the low-temperature sintering range, ensures product quality stability, adapts to actual production needs, and achieves energy conservation and emission reduction.

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Abstract

The present application relates to the technical field of the production of sanitary ceramics, and particularly relates to a low-temperature sanitary ceramic green body and a preparation method therefor, and a low-temperature sanitary ceramic. The green body comprises the following raw materials in percentages by mass: 10-20% of ball clay, 10-25% of high-alumina porcelain stone, 5-15% of spodumene tailings or microcline, 25-45% of porcelain clay, 0-10% of potassium feldspar, 5-20% of tremolite, and 5-20% of boron-containing waste glass. Problems in controlling the regularity of mass-produced products are overcome by introducing natural microfibrous / nanofibrous tremolite to replace a calcium- and magnesium-containing raw material, i.e., dolomite, performing low-temperature sintering to form a system comprising multiple mineral phases such as sodium / calcium feldspar, using a key technique capable of achieving steady-state control over the deformation rate during sintering, and broadening the sintering range of a low-temperature sintering green body. Moreover, a low-temperature sintering ceramic slurry is endowed with better forming performance, thereby improving the tensile strength of both wet and dried green bodies, solving quality problems such as susceptibility to cracking during the forming and firing processes of a green body caused by poor suspension properties of a slurry, and meeting the process requirements of mass production.
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