High-performance, reaction sintered lithium disilicate glass–ceramics
Source abstract
Abstract
Abstract A novel method of reaction sintering combined with hot-pressing technology was developed to prepare Li 2 Si 2 O 5 glass–ceramics with high flexural strength, hardness and fracture toughness. Li 2 SiO 3 crystal, SiO 2 and Li 2 Si 2 O 5 glass were used as the starting powders. The results show that via an interaction between Li 2 SiO 3 crystals and SiO 2 glass, rod-like Li 2 Si 2 O 5 crystals with length of up to tens microns could be obtained, which were several times longer than those directly crystallized from the Li 2 Si 2 O 5 parent glass. Through adjusting the Li 2 Si 2 O 5 glass content, Li 2 Si 2 O 5 glass–ceramics displayed a denser microstructure with the bimodal distribution consisting of large elongated Li 2 Si 2 O 5 grains formed during the reaction and smaller precipitates of the Li 2 Si 2 O 5 glass powder. Although the crystallinity decreased with increasing the Li 2 Si 2 O 5 glass content, the Li 2 Si 2 O 5 glass–ceramics exhibited high flexural strength (350±13 MPa), high hardness (5.92±0.18 GPa) and fracture toughness (3.3±0.14 MPa m 1/2 ).
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced ceramic materials synthesis · Microwave Dielectric Ceramics Synthesis · Nuclear materials and radiation effects
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