韩国采购需求：刚玉陶瓷容器和莫来石容器，推荐产品

I'm reaching out regarding a specific material needed for heat treatment of ceramic powder in Busan, Korea. We're looking for mullite-based materials that can withstand temperatures between 900°C and 1000°C. The dimensions we're interested in are 300mm x 300mm x 80mm, with a thickness of 8 to 10mm. Key performance requirements include minimal adhesiveness of the powder before and after treatment and resistance to thermal shock to prevent cracking or breakage. Additionally, we're keen on pricing competitiveness. If you can provide a sample that meets these specifications, we would be happy to evaluate its lifespan and performance through our quality assessment process, which might be lengthy. Looking forward to your response!