Radiation shielding window (RSW) glass for nuclear reactor is primarily required for protecting the operating personnel from harmful radioactive rays produced during nuclear energy generation in nuclear hot cells. In this respect, the production of high lead (>70% PbO) containing RSW glass is generally made using platinum pot through bottom pouring flow casting technique. However, owing to low capacity (40 L max.) of high cost platinum pot, the production of glass slab is limited to a maximum dimension of 400×400×100 mm³. Therefore, an alternate cost effective technology is highly required for making higher dimension glass slabs. To fulfill the requirement, low cost and higher volume refractory pot based tilt casting technology can be adopted. In this regard, the refractory pot is to be developed with adequate thermal, chemical and mechanical stabilities towards sustaining high corrosive lead oxide containing molten glass at 1100°-1200°C. For this purpose, a clay based alumino-silicate pot material enriched with mullite has been developed and characterized systematically. The rectangular bars have been fabricated by slip casting technique and the fabricated bars have been fired between 1450° and 1550° C. The fired materials have been characterized in terms of bulk density, apparent porosity, cold and hot modulus of rupture, etc. The RSW glass with more than 70% lead oxide content has successfully been melted in the pot. The quality of RSW glass produced using the pot has also been studied. In an optimized composition of the pot, the formation of higher content of mullite phase having high thermal shock and corrosion resistance with the desired mechanical stability is the key factor behind the stability of the refractory pot for making defect free RSW glass slabs. This cost effective refractory pot technology can substitute the platinum pot technology for producing larger dimension RSW glass slabs.

核反应堆辐射屏蔽窗（RSW）玻璃主要用于保护操作人员免受核热室核能发电过程中产生的有害放射线的伤害。在这方面，含高铅 (>70% PbO) 的 RSW 玻璃的生产通常使用铂罐通过底部浇注流动铸造技术进行。然而，由于高成本铂罐的容量低（最大40升），玻璃板的生产被限制在400×400×100 mm ³的最大尺寸. 因此，制造更高尺寸的玻璃板非常需要替代的成本效益技术。为满足这一要求，可以采用低成本和更高容量的基于耐火材料的倾斜铸造技术。在这方面，耐火罐的开发具有足够的热稳定性、化学稳定性和机械稳定性，以在 1100°-1200°C 下承受含有高腐蚀性氧化铅的熔融玻璃。为此，系统开发并表征了富含莫来石的粘土基铝硅酸盐锅材料。矩形棒材采用粉浆浇铸技术制造，所制造的棒材在 1450°C 和 1550°C 之间烧制。烧制材料已在体积密度、表观孔隙率、冷热断裂模量等方面进行表征。氧化铅含量超过 70% 的 RSW 玻璃已成功在锅中熔化。还研究了使用该罐生产的 RSW 玻璃的质量。在锅的优化组成中，具有高抗热震性和耐腐蚀性且具有所需机械稳定性的更高含量的莫来石相的形成是制造无缺陷RSW玻璃板的耐火锅稳定性背后的关键因素。这种具有成本效益的耐火罐技术可以替代铂罐技术来生产更大尺寸的 RSW 玻璃板。形成更高含量的莫来石相，具有高抗热震性和耐腐蚀性，并具有所需的机械稳定性，这是制造无缺陷 RSW 玻璃板的耐火锅稳定性背后的关键因素。这种具有成本效益的耐火罐技术可以替代铂罐技术来生产更大尺寸的 RSW 玻璃板。形成更高含量的莫来石相，具有高抗热震性和耐腐蚀性，并具有所需的机械稳定性，这是制造无缺陷 RSW 玻璃板的耐火锅稳定性背后的关键因素。这种具有成本效益的耐火罐技术可以替代铂罐技术来生产更大尺寸的 RSW 玻璃板。